Gene Report

Basic Information

Approved Symbol	MAPK14
Approved Name	mitogen-activated protein kinase 14
Previous Symbol	CSPB1, CSBP1, CSBP2
Symbol Alias	PRKM14, p38, Mxi2, PRKM15
Name Alias	"p38 MAP kinase"
Location	6p21.3-p21.2
Position	chr6:36076225-36079013 (+)
External Links	Entrez Gene: 1432 Ensembl: ENSG00000112062 UCSC: uc003olq.3 HGNC ID: 6876
No. of Studies (Positive/Negative)	1(1/0)
Type	Literature-origin

Positive relationships between MAPK14 and MDD (count: 1)

Name in Literature	Reference	Research Type	Statistical Result	Relation Description
MAPK14	Jansen R, 2015	patients and normal controls	P-value=0.0003;FDR=0.0981;beta=0.223	we found 129 genes (142 probesets) differentially expressed ...... we found 129 genes (142 probesets) differentially expressed between the control and current MDD groups (FDR<0.1) More...

Positive relationships between MAPK14 and other components at different levels (count: 0)

Positive relationship network of MAPK14 in MK4MDD

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Note:
1. The different color of the nodes denotes the level of the nodes.

Genetic/Epigenetic Locus	Protein and Other Molecule	Cell and Molecular Pathway	Neural System	Cognition and Behavior	Symptoms and Signs	Environment	MDD

2. Besides the component related relationships from literature, gene mapped protein and protein mapped gene are also shown in the network. If the mapped gene or protein is not from literature, square node would be used instead of Circle node. Accordingly, the relationship is marked with dot line.
2. User can drag the nodes to rearrange the layout of the network. Click the node will enter the report page of the node. Right-click will show also the menus to link to the report page of the node and remove the node and related edges. Hover the node will show the level of the node and hover the edge will show the evidence/description of the edge.
3. The network is generated using Cytoscape Web

Negative relationships between MAPK14 and MDD (count: 0)

Negative relationships between MAPK14 and other components at different levels (count: 0)

MAPK14 related SNPs in MK4MDD (count: 0)

MAPK14 related proteins in MK4MDD (count: 0)

MAPK14 related GO terms (count: 98)

ID	Name	Type	Evidence
Literature-origin GO terms
GO:0006915	apoptotic process	biological process	IEA

ID	Name	Type	Evidence
Gene mapped GO terms
GO:0051525	NFAT protein binding	molecular function	ISS
GO:0071222	cellular response to lipopolysaccharide	biological process	IDA[23776175]
GO:0048011	neurotrophin TRK receptor signaling pathway	biological process	TAS
GO:0019903	protein phosphatase binding	molecular function	IPI[21283629]
GO:0032553	ribonucleotide binding	molecular function	IEA
GO:0014835	myoblast differentiation involved in skeletal muscle regeneration	biological process	IEA
GO:0051146	striated muscle cell differentiation	biological process	IEA
GO:0000922	spindle pole	cellular component	IEA
GO:0005524	ATP binding	molecular function	IEA
GO:0090400	stress-induced premature senescence	biological process	IMP[20160708]
GO:0034146	toll-like receptor 5 signaling pathway	biological process	TAS
GO:0034142	toll-like receptor 4 signaling pathway	biological process	TAS
GO:0051090	regulation of sequence-specific DNA binding transcription factor activity	biological process	TAS
GO:0034138	toll-like receptor 3 signaling pathway	biological process	TAS
GO:0045944	positive regulation of transcription from RNA polymerase II promoter	biological process	IEA
GO:0004674	protein serine/threonine kinase activity	molecular function	TAS
GO:0042770	signal transduction in response to DNA damage	biological process	IMP[20160708]
GO:0006006	glucose metabolic process	biological process	IEA
GO:0019395	fatty acid oxidation	biological process	IEA
GO:1901741	positive regulation of myoblast fusion	biological process	ISS
GO:0060045	positive regulation of cardiac muscle cell proliferation	biological process	IEA
GO:0046777	protein autophosphorylation	biological process	IEA
GO:0002755	MyD88-dependent toll-like receptor signaling pathway	biological process	TAS
GO:0002756	MyD88-independent toll-like receptor signaling pathway	biological process	TAS
GO:0030316	osteoclast differentiation	biological process	ISS
GO:0035924	cellular response to vascular endothelial growth factor stimulus	biological process	IMP[18440775]
GO:0031281	positive regulation of cyclase activity	biological process	IMP[22027397]
GO:0007596	blood coagulation	biological process	TAS
GO:0010831	positive regulation of myotube differentiation	biological process	ISS
GO:0045648	positive regulation of erythrocyte differentiation	biological process	IMP[23483889]
GO:0035556	intracellular signal transduction	biological process	IDA[10838079]
GO:0005654	nucleoplasm	cellular component	IDA; TAS
GO:0090090	negative regulation of canonical Wnt signaling pathway	biological process	IEA
GO:0005634	nucleus	cellular component	ISS
GO:0006996	organelle organization	biological process	TAS
GO:0005737	cytoplasm	cellular component	ISS
GO:0042307	positive regulation of protein import into nucleus	biological process	IEA
GO:0008022	protein C-terminus binding	molecular function	IEA
GO:0070935	3'-UTR-mediated mRNA stabilization	biological process	TAS[20932473]
GO:0007265	Ras protein signal transduction	biological process	TAS
GO:0031663	lipopolysaccharide-mediated signaling pathway	biological process	IEA
GO:0071479	cellular response to ionizing radiation	biological process	IMP[20160708]
GO:0042692	muscle cell differentiation	biological process	TAS
GO:0035994	response to muscle stretch	biological process	IEA
GO:0051149	positive regulation of muscle cell differentiation	biological process	TAS
GO:0043488	regulation of mRNA stability	biological process	TAS
GO:0018105	peptidyl-serine phosphorylation	biological process	ISS
GO:0006351	transcription, DNA-templated	biological process	IEA
GO:0000187	activation of MAPK activity	biological process	TAS
GO:0000077	DNA damage checkpoint	biological process	IEA
GO:0005829	cytosol	cellular component	TAS
GO:0070062	extracellular exosome	cellular component	IDA[23376485]
GO:0010467	gene expression	biological process	TAS
GO:0034166	toll-like receptor 10 signaling pathway	biological process	TAS
GO:0001525	angiogenesis	biological process	IEA
GO:0005739	mitochondrion	cellular component	IEA
GO:0045663	positive regulation of myoblast differentiation	biological process	ISS
GO:0002224	toll-like receptor signaling pathway	biological process	TAS
GO:0051403	stress-activated MAPK cascade	biological process	TAS
GO:2001184	positive regulation of interleukin-12 secretion	biological process	IMP[25754930]
GO:0009749	response to glucose	biological process	IEA
GO:0002062	chondrocyte differentiation	biological process	IEA
GO:0032553	ribonucleotide binding	molecular function	IEA
GO:0004707	MAP kinase activity	molecular function	IDA[7997261\|10330143\|20932473]
GO:0007005	mitochondrion organization	biological process	TAS
GO:0007178	transmembrane receptor protein serine/threonine kinase signaling pathway	biological process	IEA
GO:0001890	placenta development	biological process	IEA
GO:0034134	toll-like receptor 2 signaling pathway	biological process	TAS
GO:0019899	enzyme binding	molecular function	IPI[23483889]
GO:1900015	regulation of cytokine production involved in inflammatory response	biological process	IDA[15251176]
GO:0000902	cell morphogenesis	biological process	IEA
GO:0034162	toll-like receptor 9 signaling pathway	biological process	TAS
GO:0038124	toll-like receptor TLR6:TLR2 signaling pathway	biological process	TAS
GO:0045087	innate immune response	biological process	TAS
GO:0038066	p38MAPK cascade	biological process	ISS
GO:0007166	cell surface receptor signaling pathway	biological process	TAS[10706854]
GO:0005515	protein binding	molecular function	IPI[9792677\|10415025\|10601328\|11238443\|16189514\|16751104\|17255097\|17255949\|17380123\|17380128\|18624398\|20347885\|20368287\|20871633\|20936779\|21283629\|21900206\|21908610\|21911040\|21988832\|22521293\|23397142\|23455922\|23560844\|23602568\|25241761\|25852190\|26496610]
GO:0038123	toll-like receptor TLR1:TLR2 signaling pathway	biological process	TAS
GO:0048010	vascular endothelial growth factor receptor signaling pathway	biological process	IMP[18440775]; TAS
GO:0006935	chemotaxis	biological process	TAS[10706854]
GO:0032495	response to muramyl dipeptide	biological process	IEA
GO:2000379	positive regulation of reactive oxygen species metabolic process	biological process	IMP[20160708]
GO:0006928	movement of cell or subcellular component	biological process	TAS[10912793]
GO:0001502	cartilage condensation	biological process	IEA
GO:0007519	skeletal muscle tissue development	biological process	IEA
GO:0046326	positive regulation of glucose import	biological process	IEA
GO:0098586	cellular response to virus	biological process	IMP[25754930]
GO:0006357	regulation of transcription from RNA polymerase II promoter	biological process	ISS
GO:0032553	ribonucleotide binding	molecular function	IEA
GO:0030168	platelet activation	biological process	TAS
GO:0035666	TRIF-dependent toll-like receptor signaling pathway	biological process	TAS
GO:0032553	ribonucleotide binding	molecular function	IEA
GO:0090336	positive regulation of brown fat cell differentiation	biological process	IEA
GO:0010628	positive regulation of gene expression	biological process	IMP[25754930]
GO:0007165	signal transduction	biological process	TAS[10706854]
GO:0004708	MAP kinase kinase activity	molecular function	TAS[10706854]
GO:0043536	positive regulation of blood vessel endothelial cell migration	biological process	IMP[18440775]

MAPK14 related KEGG pathways (count: 14)

ID	Name	Brief Description	Full Description
Literature-origin KEGG pathway
hsa04914	progesterone mediated_oocyte_maturation	Progesterone-mediated oocyte maturation	Xenopus oocytes are naturally arrested at G2 of meiosis I. E...... Xenopus oocytes are naturally arrested at G2 of meiosis I. Exposure to either insulin/IGF-1 or the steroid hormone progesterone breaks this arrest and induces resumption of the two meiotic division cycles and maturation of the oocyte into a mature, fertilizable egg. This process is termed oocyte maturation. The transition is accompanied by an increase in maturation promoting factor (MPF or Cdc2/cyclin B) which precedes germinal vesicle breakdown (GVBD). Most reports point towards the Mos-MEK1-ERK2 pathway and the polo-like kinase/CDC25 pathway as responsible for the activation of MPF in meiosis, most likely triggered by a decrease in cAMP. More...

ID	Name	Brief Description	Full Description
Gene mapped KEGG pathways
hsa05140	leishmania infection	Leishmania infection	Leishmania is an intracellular protozoan parasite of macroph...... Leishmania is an intracellular protozoan parasite of macrophages that causes visceral, mucosal, and cutaneous diseases. The parasite is transmitted to humans by sandflies, where they survive and proliferate intracellularly by deactivating the macrophage. Successful infection of Leishmania is achieved by alteration of signaling events in the host cell, leading to enhanced production of the autoinhibitory molecules like TGF-beta and decreased induction of cytokines such as IL12 for protective immunity. Nitric oxide production is also inhibited. In addition, defective expression of major histocompatibility complex (MHC) genes silences subsequent T cell activation mediated by macrophages, resulting in abnormal immune responses. More...
hsa04670	leukocyte transendothelial_migration	Leukocyte transendothelial migration	Leukocyte migaration from the blood into tissues is vital fo...... Leukocyte migaration from the blood into tissues is vital for immune surveillance and inflammation. During this diapedesis of leukocytes, the leukocytes bind to endothelial cell adhesion molecules (CAM) and then migrate across the vascular endothelium. A leukocyte adherent to CAMs on the endothelial cells moves forward by leading-edge protrusion and retraction of its tail. In this process, alphaL /beta2 integrin activates through Vav1, RhoA, which subsequently activates the kinase p160ROCK. ROCK activation leads to MLC phosphorylation, resulting in retraction of the actin cytoskeleton. Moreover, Leukocytes activate endothelial cell signals that stimulate endothelial cell retraction during localized dissociation of the endothelial cell junctions. ICAM-1-mediated signals activate an endothelial cell calcium flux and PKC, which are required for ICAM-1 dependent leukocyte migration. VCAM-1 is involved in the opening of the endothelial passage through which leukocytes can extravasate. In this regard, VCAM-1 ligation induces NADPH oxidase activation and the production of reactive oxygen species (ROS) in a Rac-mediated manner, with subsequent activation of matrix metallopoteinases and loss of VE-cadherin-mediated adhesion. More...
hsa05014	amyotrophic lateral_sclerosis_als	Amyotrophic lateral sclerosis (ALS)	Amyotrophic lateral sclerosis (ALS) is a progressive, lethal...... Amyotrophic lateral sclerosis (ALS) is a progressive, lethal, degenerative disorder of motor neurons. The hallmark of this disease is the selective death of motor neurons in the brain and spinal cord, leading to paralysis of voluntary muscles. Mutant superoxide dismutase 1 (SOD1), as seen in some familial amyotrophic lateral sclerosis (FALS) cases, may be toxic because it is unstable, forming aggregates in the motor neuron cytoplasm, axoplasm and mitochondria. Within mitochondria, mutant SOD1 may interfere with the anti-apoptotic function of Bcl-2, affect mitochondrial import by interfering with the translocation machinery (TOM/TIM), and generate toxic free radicals (ROS) via aberrant superoxide chemistry. These changes may then result in abnormal mitochondrial energy metabolism, Ca2+ handling, and release of pro-apoptotic factors. Reactive oxygen species (ROS), produced within mitochondria, inhibit the function of EAAT2, the main glial glutamate transporter protein, responsible for most of the reuptake of synaptically released glutamate. Glutamate excess causes neurotoxicity by increasing intracellular calcium, which enhances oxidative stress and mitochondrial damage. Mutant SOD1 can also trigger oxidative reactions by various means including by increasing levels of peroxynitrite, which can then cause damage through the formation of hydroxyl radicals or via nitration of tyrosine residues on proteins. Nitration may target neurofilament proteins, disrupting their phosphorylation and affecting axonal transport. Collectively, these mechanisms (or a combination thereof) are predicted to disturb cellular homeostasis (within glial and/or motor neurons), ultimately triggering motor neuron death. More...
hsa04621	nod like_receptor_signaling_pathway	NOD-like receptor signaling pathway	Specific families of pattern recognition receptors are respo...... Specific families of pattern recognition receptors are responsible for detecting various pathogens and generating innate immune responses. The intracellular NOD-like receptor (NLR) family contains more than 20 members in mammals and plays a pivotal role in the recognition of intracellular ligands. NOD1 and NOD2, two prototypic NLRs, sense the cytosolic presence of the bacterial peptidoglycan fragments that escaped from endosomal compartments, driving the activation of NF-{kappa}B and MAPK, cytokine production and apoptosis. On the other hand, a different set of NLRs induces caspase-1 activation through the assembly of multiprotein complexes called inflammasomes. These NLRs include NALP1, NALP3 and Ipaf. The inflammasomes are critical for generating mature proinflammatory cytokines in concert with Toll-like receptor signaling pathway. More...
hsa04622	rig i_like_receptor_signaling_pathway	RIG-I-like receptor signaling pathway	Specific families of pattern recognition receptors are respo...... Specific families of pattern recognition receptors are responsible for detecting viral pathogens and generating innate immune responses. Non-self RNA appearing in a cell as a result of intracellular viral replication is recognized by a family of cytosolic RNA helicases termed RIG-I-like receptors (RLRs). The RLR proteins include RIG-I, MDA5, and LGP2 and are expressed in both immune and nonimmune cells. Upon recognition of viral nucleic acids, RLRs recruit specific intracellular adaptor proteins to initiate signaling pathways that lead to the synthesis of type I interferon and other inflammatory cytokines, which are important for eliminating viruses. More...
hsa04660	t cell_receptor_signaling_pathway	T cell receptor signaling pathway	Activation of T lymphocytes is a key event for an efficient ...... Activation of T lymphocytes is a key event for an efficient response of the immune system. It requires the involvement of the T-cell receptor (TCR) as well as costimulatory molecules such as CD28. Engagement of these receptors through the interaction with a foreign antigen associated with major histocompatibility complex molecules and CD28 counter-receptors B7.1/B7.2, respectively, results in a series of signaling cascades. These cascades comprise an array of protein-tyrosine kinases, phosphatases, GTP-binding proteins and adaptor proteins that regulate generic and specialised functions, leading to T-cell proliferation, cytokine production and differentiation into effector cells. More...
hsa05120	epithelial cell_signaling_in_helicobacter_pylori_infection	Epithelial cell signaling in Helicobacter pylori infection	Two major virulence factors of H. pylori are the vacuolating...... Two major virulence factors of H. pylori are the vacuolating cytotoxin (VacA) and the cag type-IV secretion system (T4SS) and its translocated effector protein, cytotoxin-associated antigen A (CagA). VacA binds to lipid rafts and glycosylphosphatidylinositol-anchored proteins (GPI-APs) of the target cell membrane. After insertion into the plasma membrane, VacA channels are endocytosed and eventually reach late endosomal compartments, increasing their permeability to anions with enhancement of the electrogenic vacuolar ATPase (v-ATPase) proton pump. In the presence of weak bases, osmotically active acidotropic ions will accumulate in the endosomes. This leads to water influx and vesicle swelling, an essential step in vacuole formation. In addition, it is reported that the VacA cleavage product binds to the tyrosine phosphatase receptor zeta (Ptprz) on epithelial cells and the induced signaling leads to the phosphorylation of the G protein-coupled receptor kinase-interactor 1 (Git1) and induces ulcerogenesis in mice. The other virulence factor cag T4SS mediates the translocation of the effector protein CagA, which is subsequently phosphorylated by a Src kinase. Phosphorylated CagA interacts with the protein tyrosine phosphatase SHP-2, thus stimulating its phosphatase activity. Activated SHP-2 is able to induce MAPK signalling through Ras/Raf-dependent and -independent mechanisms. Deregulation of this pathway by CagA may lead to abnormal proliferation and movement of gastric epithelial cells. More...
hsa04722	neurotrophin signaling_pathway	Neurotrophin signaling pathway	Neurotrophins are a family of trophic factors involved in di...... Neurotrophins are a family of trophic factors involved in differentiation and survival of neural cells. The neurotrophin family consists of nerve growth factor (NGF), brain derived neurotrophic factor (BDNF), neurotrophin 3 (NT-3), and neurotrophin 4 (NT-4). Neurotrophins exert their functions through engagement of Trk tyrosine kinase receptors or p75 neurotrophin receptor (p75NTR). Neurotrophin/Trk signaling is regulated by connecting a variety of intracellular signaling cascades, which include MAPK pathway, PI-3 kinase pathway, and PLC pathway, transmitting positive signals like enhanced survival and growth. On the other hand, p75NTR transmits both positive and nagative signals. These signals play an important role for neural development and additional higher-order activities such as learning and memory. More...
hsa04912	gnrh signaling_pathway	GnRH signaling pathway	Gonadotropin-releasing hormone (GnRH) secretion from the hyp...... Gonadotropin-releasing hormone (GnRH) secretion from the hypothalamus acts upon its receptor in the anterior pituitary to regulate the production and release of the gonadotropins, LH and FSH. The GnRHR is coupled to Gq/11 proteins to activate phospholipase C which transmits its signal to diacylglycerol (DAG) and inositol 1,4,5-trisphosphate (IP3). DAG activates the intracellular protein kinase C (PKC) pathway and IP3 stimulates release of intracellular calcium. In addition to the classical Gq/11, coupling of Gs is occasionally observed in a cell-specific fashion. Signaling downstream of protein kinase C (PKC) leads to transactivation of the epidermal growth factor (EGF) receptor and activation of mitogen-activated protein kinases (MAPKs), including extracellular-signal-regulated kinase (ERK), Jun N-terminal kinase (JNK) and p38 MAPK. Active MAPKs translocate to the nucleus, resulting in activation of transcription factors and rapid induction of early genes. More...
hsa04370	vegf signaling_pathway	VEGF signaling pathway	There is now much evidence that VEGFR-2 is the major mediato...... There is now much evidence that VEGFR-2 is the major mediator of VEGF-driven responses in endothelial cells and it is considered to be a crucial signal transducer in both physiologic and pathologic angiogenesis. The binding of VEGF to VEGFR-2 leads to a cascade of different signaling pathways, resulting in the up-regulation of genes involved in mediating the proliferation and migration of endothelial cells and promoting their survival and vascular permeability. For example, the binding of VEGF to VEGFR-2 leads to dimerization of the receptor, followed by intracellular activation of the PLCgamma;PKC-Raf kinase-MEK-mitogen-activated protein kinase (MAPK) pathway and subsequent initiation of DNA synthesis and cell growth, whereas activation of the phosphatidylinositol 3' -kinase (PI3K)-Akt pathway leads to increased endothelial-cell survival. Activation of PI3K, FAK, and p38 MAPK is implicated in cell migration signaling. More...
hsa04664	fc epsilon_ri_signaling_pathway	Fc epsilon RI signaling pathway	Fc epsilon RI-mediated signaling pathways in mast cells are ...... Fc epsilon RI-mediated signaling pathways in mast cells are initiated by the interaction of antigen (Ag) with IgE bound to the extracellular domain of the alpha chain of Fc epsilon RI. The activation pathways are regulated both positively and negatively by the interactions of numerous signaling molecules. Mast cells that are thus activated release preformed granules which contain biogenic amines (especially histamines) and proteoglycans (especially heparin). The activation of phospholipase A2 causes the release of membrane lipids followed by development of lipid mediators such as leukotrienes (LTC4, LTD4 and LTE4) and prostaglandins (especially PDG2). There is also secretion of cytokines, the most important of which are TNF-alpha, IL-4 and IL-5. These mediators and cytokines contribute to inflammatory responses. More...
hsa04010	mapk signaling_pathway	MAPK signaling pathway	The mitogen-activated protein kinase (MAPK) cascade is a hig...... The mitogen-activated protein kinase (MAPK) cascade is a highly conserved module that is involved in various cellular functions, including cell proliferation, differentiation and migration. Mammals express at least four distinctly regulated groups of MAPKs, extracellular signal-related kinases (ERK)-1/2, Jun amino-terminal kinases (JNK1/2/3), p38 proteins (p38alpha/beta/gamma/delta) and ERK5, that are activated by specific MAPKKs: MEK1/2 for ERK1/2, MKK3/6 for the p38, MKK4/7 (JNKK1/2) for the JNKs, and MEK5 for ERK5. Each MAPKK, however, can be activated by more than one MAPKKK, increasing the complexity and diversity of MAPK signalling. Presumably each MAPKKK confers responsiveness to distinct stimuli. For example, activation of ERK1/2 by growth factors depends on the MAPKKK c-Raf, but other MAPKKKs may activate ERK1/2 in response to pro-inflammatory stimuli. More...
hsa04620	toll like_receptor_signaling_pathway	Toll-like receptor signaling pathway	Specific families of pattern recognition receptors are respo...... Specific families of pattern recognition receptors are responsible for detecting microbial pathogens and generating innate immune responses. Toll-like receptors (TLRs) are membrane-bound receptors identified as homologs of Toll in Drosophila. Mammalian TLRs are expressed on innate immune cells, such as macrophages and dendritic cells, and respond to the membrane components of Gram-positive or Gram-negative bacteria. Pathogen recognition by TLRs provokes rapid activation of innate immunity by inducing production of proinflammatory cytokines and upregulation of costimulatory molecules. TLR signaling pathways are separated into two groups: a MyD88-dependent pathway that leads to the production of proinflammatory cytokines with quick activation of NF-{kappa}B and MAPK, and a MyD88-independent pathway associated with the induction of IFN-beta and IFN-inducible genes, and maturation of dendritic cells with slow activation of NF-{kappa}B and MAPK. More...

MAPK14 related BioCarta pathways (count: 25)

ID	Name	Brief Description	Full Description
Literature-origin BioCarta pathway
NTHI_PATHWAY	nthi pathway	NFkB activation by Nontypeable Hemophilus influenzae	The role of Hemophilus influenzae in ear infections and chro...... The role of Hemophilus influenzae in ear infections and chronic obstructive pulmonary disease includes the induction of an inflammatory response through activation of the transcription factor NF-kB. In addition to activation of inflammatory cytokine genes like IL-1 and TNF, H. influenzae activates TLR2 expression and genes involved in mucus production. Hemophilus influenzae activates NF-kB by multiple mechanisms, starting with activation of the Toll-like receptor 2 (TLR2) by the p16 protein in the H. influenzae outer membrane. TLR2 plays a key role in innate immune responses and is expressed in high levels in lymphoid cells as well as low levels in epithelial cells. The role of TLR2 was supported by blocking NF-kB activation with a dominant negative TLR2 and increasing it with transfection of a normal TLR2 gene. TLR2 in turn activates TAK1, which activates two divergent signaling pathways. One of these pathways leads to IkB kinase activation, IkB phosphorylation and degradation, releasing the NF-kB heterodimer to translocate into the nucleus and activate transcription of target genes. In the alternate pathway, TAK1 also activates NF-kB through a Map kinase pathway, activating p38 and NF-kB in a nuclear translocation independent manner. Investigation of the mechanisms of H. influenzae signaling involved in NF-kB activation may provide the information needed to develop better treatments for inflammatory conditions caused by this pathogen. Other pathways modulate the role of NF-kB in H. influenzae pathogenesis. Glucocorticoids widely used as anti-inflammatory drugs increase TLR2 activation by H. influenzae through the NIK/I-kB kinase pathway, while they repress the p38 dependent activation of NF-kB. The repression of the p38 pathway by glucocorticoids occurs through activation of the MAP kinase phosphatase-1 (MKP-1) which dephosphorylates and deactivates p38. Another aspect of the inflammatory response to H. influenzae infection is the production of excessive mucus, contributing to the overall symptoms of infection. NF-kB activation of the Muc2 gene contributes to mucus overproduction, in addition to H. influenzae activation of the TGF-beta receptor, activating SMAD transcription factors SMAD3 and SMAD4. Understanding mechanisms that modify H. influenzae signaling will contribute to further understanding the pathogenesis and treatment of ear infections and chronic obstructive pulmonary disease. More...

ID	Name	Brief Description	Full Description
Gene mapped BioCarta pathways
FMLP_PATHWAY	fmlp pathway	fMLP induced chemokine gene expression in HMC-1 cells	Neutrophils respond to bacterial infection by releasing reac...... Neutrophils respond to bacterial infection by releasing reactive oxygen species that kill bacteria and by expressing chemokines that attract other immune cells to the site of infection. The multisubunit enzyme NADPH oxidase expressed by neutrophils produces reactive oxygen species rapidly released in what is known as the respiratory burst. Activity of the NADPH oxidase is induced by fMLP receptor ligands, formylated peptides from bacteria. The fMLP receptor is a G-protein coupled receptor, FPR-1, that activates Map kinase pathways and phospholipase C. Phospholipase C activation releases IP3 and calcium, activating protein kinase C and also activating the transcription factor NFAT, which contributes to activation of chemokine genes. One of the components of the NADPH oxidase is p47phox. PKC activation phosphorylates p47phox to activate NADPH oxidase activity. Activation of Map kinase cascades leads to Erk1/Erk2 dependent p47phox phosphorylation as well as activation of the Elk-1 transcription factor and chemokine gene expression. Inhibition of p38 did not affect p47phox phosphorylation, indicating that p38 is not involved in Erk1/2 activation of the NADPH oxidase. Inhibition of p38 did inhibit NADPH oxidase though, indicating that other pathways contribute to activation of this enzyme. The pathways involved in neutrophils activation are important to understand innate immune responses to bacterial infection. More...
BIOPEPTIDES_PATHWAY	biopeptides pathway	Bioactive Peptide Induced Signaling Pathway	Many different peptides act as signaling molecules, includin...... Many different peptides act as signaling molecules, including the proinflammatory peptide bradykinin, the protease enzyme thrombin, and the blood pressure regulating peptide angiotensin. While these three proteins are distinct in their sequence and physiology, and act through different cell surface receptors, they share in a common class of cell surface receptors called G-protein coupled receptors (GPCRs). Other polypeptide ligands of GPCRs include vasopressin, oxytocin, somatostatin, neuropeptide Y, GnRH, leutinizing hormone, follicle stimulating hormone, parathyroid hormone, orexins, urotensin II, endorphins, enkephalins, and many others. GPCRs are a broad and diverse gene family that respond not only to peptide ligands but also small molecule neurotransmitters (acetylcholine, dopamine, serotonin and adrenaline), light, odorants, taste, lipids, nucleotides, and ions. The main signaling mechanism used by GPCRs is to interact with G-protein GTPase proteins coupled to downstream second messenger systems including intracellular calcium release and cAMP production. The intracellular signaling systems used by peptide GPCRs are similar to those used by all GPCRs, and are typically classified according to the G-protein they interact with and the second messenger system that is activated. For Gs-coupled GPCRs, activation of the G-protein Gs by receptor stimulates the downstream activation of adenylate cyclase and the production of cyclic AMP, while Gi-coupled receptors inhibit cAMP production. One of the key results of cAMP production is activation of protein kinase A. Gq-coupled receptors stimulate phospholipase C, releasing IP3 and diacylglycerol. IP3 binds to a receptor in the ER to cause the release of intracellular calcium, and the subsequent activation of protein kinase C, calmodulin-dependent pathways. In addition to these second messenger signaling systems for GPCRs, GPCR pathways exhibit crosstalk with other signaling pathways including tyrosine kinase growth factor receptors and map kinase pathways. Transactivation of either receptor tyrosine kinases like the EGF receptor or focal adhesion complexes can stimulate ras activation through the adaptor proteins Shc, Grb2 and Sos, and downstream Map kinases activating Erk1 and Erk2. Src kinases may also play an essential intermediary role in the activation of ras and map kinase pathways by GPCRs. More...
GATA3_PATHWAY	gata3 pathway	GATA3 participate in activating the Th2 cytokine genes expression	CD4+ helper T cells differentiate into distinct subtypes, Th...... CD4+ helper T cells differentiate into distinct subtypes, Th1 and Th2 cells. Th2 cells are involved in the response to extracellular helminthe parasites and allergic responses and secrete a distinct set of cytokines including IL-4, IL-5 and IL-13. The development and differentiation of T cells is influenced by many factors, including transcription factors such as GATA-3, a transcription factor associated with induction of Th2 cells. Factors that increase cAMP levels in Th2 cells activate p38 kinase, which phosphorylates and activates GATA-3 independently of PKA. Cells expressing GATA-3 develop the profile of Th2 cells, secreting IL-4, IL-5 and IL-13. These cytokines are found in a gene cluster together and are regulated coordinately by GATA-3. Binding of GATA-3 in the regulatory regions of these genes alters chromatin structure, increasing accessibility to other transcription factors. Activation of the T cell receptor through interaction with antigen on antigen presenting cells activates NFAT and other transcription factors that cooperate with GATA-3 in inducing Th2 cell differentiation. Dominant negative GATA-3 can repress the secretion of these cytokines and block the airway inflammation that causes asthma. Blocking GATA-3 action such as through antisense treatment has been suggested as a therapeutic strategy to treat asthma. GATA-3 has also been implicated in developmental processes such as the development of the inner ear. More...
P38MAPK_PATHWAY	p38mapk pathway	p38 MAPK Signaling Pathway	p38 MAPKs are members of the MAPK family that are activated ...... p38 MAPKs are members of the MAPK family that are activated by a variety of environmental stresses and inflammatory cytokines. Stress signals are delivered to this cascade by members of small GTPases of the Rho family (Rac, Rho, Cdc42). As with other MAPK cascades, the membrane-proximal component is a MAPKKK, typically a MEKK or a mixed lineage kinase (MLK). The MAPKKK phosphorylates and activated MKK3/5, the p38 MAPK kinase. MKK3/6 can also be activated directly by ASK1, which is stimulated by apoptotic stimuli. P38 MAK is involved in regulation of Hsp27 and MAPKAP-2 and several transcription factors including ATF2, STAT1, THE Max/Myc complex, MEF-2, ELK-1 and indirectly CREB via activation of MSK1. More...
CREB_PATHWAY	creb pathway	Transcription factor CREB and its extracellular signals	The transcription factor CREB binds the cyclic AMP response ...... The transcription factor CREB binds the cyclic AMP response element (CRE) and activates transcription in response to a variety of extracellular signals including neurotransmitters, hormones, membrane depolarization, and growth and neurotrophic factors. Protein kinase A and the calmodulin-dependent protein kinases CaMKII stimulate CREB phosphorylation at Ser133, a key regulatory site controlling transcriptional activity. Growth and neurotrophic factors also stimulate CREB phosphorylation at Ser133. Phosphorylation occurs at Ser133 via p44/42 MAP Kinase and p90RSK and also via p38 MAP Kinase and MSK1. CREB exhibit deficiencies in spatial learning tasks, while flies overexpressing or lacking CREB show enhanced or diminished learning, respectively. More...
EIF4_PATHWAY	eif4 pathway	Regulation of eIF4e and p70 S6 Kinase	eIF-4F and p70 S6 kinase play critical roles in translationa...... eIF-4F and p70 S6 kinase play critical roles in translational regulation. eIF-4F is a complex whose functions include the recognition of the mRNA 5' cap structure (eIF-4E), delivery of an RNA helicase to the 5' region (eIF-4A), bridging of the mRNA and the ribosome (eIF-4G), and circularization of the mRNA via interaction between eIF-4G and the poly(A) binding protein (PABP). Several stimuli, including growth factors and cytokines, regulate the eIF-4 complex and p70 S6 kinase by initiating a phosphorylation cascade involving the sequential activation of PI3-K, PDK1/2, Akt/PKB, and FRAP/mTOR kinase. FRAP/mTOR, together with an unidentified kinase, phosphorylates 4E-BP, leading to its dissociation from and activation of eIF-4E. MNK1/2, activated by ERK and p38 MAPK, phosphorylates and activates eIF-4E. Both processes contribute to the association of eIF-4E and eIF-4G to form the active eIF-4F complex, a necessary component of the 48S initiation complex. Phosphorylation of ribosomal protein S6 by p70 S6 kinase stimulates the translation of mRNAs with a 5' oligopyrimidine tract which typically encode components of the protein synthesis. More...
IL12_PATHWAY	il12 pathway	IL12 and Stat4 Dependent Signaling Pathway in Th1 Development	Interleukin-12 (IL-12) promotes cell-mediated immunity by in...... Interleukin-12 (IL-12) promotes cell-mediated immunity by inducing Th1 cell differentiation and activation of both T cells and NK cells. Dendritic cells and macrophages in peripheral tissues act as antigen presenting cells and secrete IL-12 as one component of the antigen response, Th1 differentiation. The role of IL-12 in cellular immunity is largely mediated by the STAT-4 transcription factor. STAT-4 is essential for IL-12 activity and the phenotype of mice lacking STAT-4 is very similar to the phenotype of mice lacking the IL-12 receptor or IL-12. The role of IL-12 in Th1 differentiation may not be to induce the Th1 cell fate, but to stimulate growth of cells determined for the Th1 cell fate by the T-bet transcription factor. Several signaling pathways contribute to IL-12 activation of STAT-4 to regulate cell-mediated immune responses. The JAK kinases such as JAK2 and TYK2 interact with the activated IL-12 receptor and tyrosine phosphorylate the IL-12 receptor and STAT-4. IL-12 also activates a map kinase pathway activating the map kinase kinase MKK6 and p38. Phosphorylation of STAT-4 on serine 721 by p38 contributes to the full transcriptional activation of genes by STAT-4. Some of the events downstream of IL-12 appear to include genes activated indirectly by STAT-4, such as genes activated by the transcription factor ERM. ERM is in the Ets family of transcription factors, is activated by IL-12 and activates IL-12 inducible genes such as Interferon-gamma that are not activated by STAT-4 itself. Interferon-gamma transcription in T cells is also activated by other signals such as from the T cell receptor. Other proteins activated transcriptionally downstream of IL-12 and STAT-4 include the chemokine receptor CCR5 and IL-18 and its receptor. Some viruses, including HIV, repress cell-mediated immunity by blocking IL-12 signaling. More...
CCR5_PATHWAY	ccr5 pathway	Pertussis toxin-insensitive CCR5 Signaling in Macrophage	The chemokine receptors CCR5 and CXCR4 in macrophages are ac...... The chemokine receptors CCR5 and CXCR4 in macrophages are activated by their peptide ligands and also by the HIV envelope protein GP120 during HIV infection. One mechanism of signaling by these GPCRs is through activation of Gi signaling. These chemokine receptors can also signal through a Gi-independent pertussis toxin-insensitive pathway. This pathway elevates calcium influx into the cell through CRAC channels, ion channels that are activated by calcium release. Elevated calcium from CRAC is required for downstream activation of Pyk2, a focal adhesion-associated protein kinase. Non Gi signaling by these chemokine receptors also involves the Jnk and p38 Map kinase pathways leading to AP-1 activation and activation of genes such as MIP-1 and MCP-1. This pathway may be involved in the role of macrophages in the pathogenesis of AIDS. More...
MAPK_PATHWAY	mapk pathway	MAPKinase Signaling Pathway	The ever evolving mitogen-activated protein kinase (MAP kina...... The ever evolving mitogen-activated protein kinase (MAP kinase) pathways consist of four major groupings and numerous related proteins which constitute interrelated signal transduction cascades activated by stimuli such as growth factors, stress, cytokines and inflammation. The four major groupings are the Erk (red), JNK or SAPK (blue), p38 (green) and the Big MAPK or ERK5 (light blue) cascades. Signals from cell surface receptors such as GPCRs and growth factor receptors are transduced, directly or via small G proteins such as ras and rac, to multiple tiers of protein kinases that amplify these signals and/or regulate each other. The diagram is organized to illustrate the cascades by the background colors and also the tiers of kinases as indicated down the left hand side and separated by the horizontal dashed lines. In some cascades the first activation tier involves the MAPKKKKs, MAP kinase kinase kinase kinases or MAP4K proteins. The next tier are the serine/threonine MAPKKKs, MAP kinase kinase kinase or MAP3Ks such as RAF, TAK, ASK, and MEKK1. This level has the greatest amount of cross-communication curently known. The serine/threonine/tyrosine MAPKKs, MAP Kinase kinases or MAP2Ks, such as the MKK and MEK kinases, are one step up from the MAP kinase cascade, phosphorylating and activating these kinases. The focal tier, the MAPKs or MAP kinases includes JNK1, p38, and ERKs, and are the kinases that give each cascade its name BR>The endpoints of these cascades, shown in the bottom tier, includes the MAPK activated protein kinases (MAPKAPK) and some of the numerous transcription factors that regulate genes involved in apoptosis, inflammation, cell growth and differentiation NOTES:- The shared color and the bold arrows show the major flow of each cascade. - The smaller arrows indicate cross communication between cascades. In many cases this is restricted to certain cell types or requires additional factors. - Kinases that have been identified as MAP kinases based on sequence or structural homolgies but have not yet been assigned to a cascade have been placed out side the grouping backrgounds. - The PAKs (p21 associated kinases) are not MAPKs but participate in the transduction to the JNK cascade are included for this reason.) - MEK4 appears to function in both the JNK and p38 cascades and so has a mixed color. MEK4 signal is much stronger in the JNK than the p38 cascade and so the bold arrow towards the JNK and the dashed arrow towards the p38 cascade indicate the relative strengths of signaling. - For space and readability concerns not all interactions and stimuli are indicated and the scaffold and phosphatase proteins are not shown. More...
PYK2_PATHWAY	pyk2 pathway	Links between Pyk2 and Map Kinases	This diagram is a compilation of Pyk2 effort cascades. In sp...... This diagram is a compilation of Pyk2 effort cascades. In specific cell types the receptor and effoectors will vary. Binding of a transmembrane receptor triggers the activation of Ca2+ signaling and PKC. The signal is then transmitted to Pyk2 and further to the small G protein Rac1. In turn, Rac1 initiatates the JNK cascade, starting with PAK follwed by MEKK1, SEK1, and JNK. JNK activation causes induction of c-Jun gene binding. Pyk2 stimulation has also been shown to activate MKK3 leading to activation of p38. The other major mitogen activated kinase cascade for ERK1/2 is stimulated via RAS, RAF and MEKK1/2. More...
KERATINOCYTE_PATHWAY	keratinocyte pathway	Keratinocyte Differentiation	The epidermis, which provides a protective barrier that unde...... The epidermis, which provides a protective barrier that undergoes a constant renewal, is a multi-layered tissue with the proliferating cells located in the basal layer. As cells leave the basal layer the underog significant differentiation, biochemical and morphological remodeling. The final differentiation results in the formation of corneocytes. In vitro keratinocytes mimic this process. Several genes mark keratinocyte specific differentiation. Among the most frequently tracked markers are Transglutaminase, Cystatin and Involucrin. The keratinocyte differentiation studies have identified and provided significant detail regarding the involvement of three of the 4 major MAP kinase pathways from several diverse stimuli such as EGF, FAS, TNF and Calicium influx. The p38 cascade is represented twice since both p38alpha (p38) and p38delta (MAPK13) are involved. The keratinocyte differentiation cascased also provide for detailed study of the functions of individual PKC isoforms. It is interesting to note the contrasting functions of the PKC isoforms in this process. In recent studies it has been determined that the cPKC (conventional/classical Protein Kinase C) isoforms, which are calcium-, phospholipid-, and diacylglycerol-dependent are inhibitory where as the nPKC (novel Protein Kinase C) isoforms which are calcium independent are stimulatory for keratinocyte differentiation markers. On the right hand side is an earlier step showing the upregulation loop of TRAF2. This step occurs prior to the activation os ASK1 and the p38 cascade. More...
SARS_PATHWAY	sars pathway	The SARS-coronavirus Life Cycle	Severe Acute Respiratory Syndrome (SARS) has affected thousa...... Severe Acute Respiratory Syndrome (SARS) has affected thousands of individuals, causing fever, and pneumonia with a mortality rate estimated at 10-18%. A novel coronavirus has been identified as the cause agent and its genome has been sequenced. Human coronaviruses cause mild respiratory illness and accounts for about a third of all cases of the common cold. The enveloped SARS virus contains a large + strand RNA genome, approximately 30,000 nucleotides. Examination of the SARS coronavirus sequences reveals that rep gene covers over 20,000 nucleotides and encodes two overlapping polyproteins cleaved by viral proteases into smaller protein products. Translation of the longer polyprotein encoded by the rep gene requires a ribosomal frameshift. Other viral genes are predicted to encode the transmembrane spike protein S involved in viral fusion with host cells, the envelope protein E, the membrane protein M and the nucleocapsid protein N that binds to the RNA genome as well as several additional open reading frames with unknown functions. Viral entry into the cell is followed by translation of the viral rep gene, which codes for a viral protease within the polyprotein, Mpro or 3CLpro. The SARS 3CLpro has also been verified in vitro to cleave after the Gln residue at Leu-Gln-(Ser, Ala, Gly),. Polypeptides released from the polyproteins by the main viral protease Mpro or 3CLpro include the viral polymerase and a protease. Both products are essential for viral replication and transcription. Structural crystals of a porcine coronavirus protease with a transition state inhibitor suggest that inhibitors of the distantly related rhinovirus protease like the drug AG7088 may be modified to produce drugs that block the SARS protease and viral replication. Blocking entry of the SARS virus into cells, involving recognition of cellular receptors by the S spike protein, may provide another strategy for the development of drugs to treat SARS. More...
41BB_PATHWAY	41bb pathway	The 4-1BB-dependent immune response	The activation of T cells requires a co-stimulatory signal w...... The activation of T cells requires a co-stimulatory signal with T cell receptor activation, provided in many cases by activation of CD28 in resting T cells. 4-1BB (CD137) is a member of the TNF receptor gene family that provides another T cell co-stimulatory signal. 4-1BB is expressed by activated cytotoxic and helper T cells and its expression is induced by a variety of T cell stimuli, including activation of the T cell receptor or stimulation with mitogens. The ligand for 4-1BB (4-1BBL) is induced on activated antigen-presenting cells including macrophages, activating T cells expressing 4-1BB. Mice lacking 4-1BB survive and have an altered though functional immune response. T cells of mice lacking 4-1BB proliferate more rapidly than normal T cells, but have reduced cytokine secretion. The costimulatory signal provided by 4-1BB may act in combination with CD28 activation to prolong the T cell response, and may also act independently of CD28. Stimulation of T cells with the 4-1BB ligand may provide a therapeutic immune response in the treatment of cancer or viral infection. 4-1BB in T cells activates several signaling pathways. Like other members of the TNF receptor family, the 4-1BB receptor does not have an intrinsic kinase activity. TRAF2 is a signaling adapter that mediates signaling by other members of the TNF receptor family and that also binds to the cytoplasmic domain of ligand activated 4-1BB to activate intracellular kinase cascades. TRAF1 also binds to the cytoplasmic domain of 4-1BB although with lower affinity than TRAF2. One downstream effector activated by 4-1BB through TRAF2 is the transcription factor NF-kB. 4-1BB also activates map kinase pathways, including p38 and JNK activation. ASK1 dependent pathways can activate both p38 and JNK, and dominant negative ASK1 blocks their activation. Other kinase pathways may also be involved in 4-1BB activation of p38 and JNK, such as activation of germinal center kinase (GCK) or related kinases involved in activation of JNK and p38 by TNF. Map kinase activation along with NF-kB activation results in transcriptional activation of cytokine genes involved in T cell activation and signaling. The co-stimulatory signaling provided by 4-1BB shares some features with CD28 signaling, providing an explanation for the ability of 4-1BB to replace the CD28 costimulatory signal in some settings. More...
HCMV_PATHWAY	hcmv pathway	Human Cytomegalovirus and Map Kinase Pathways	To replicate in the host cell, viruses commandeer cellular s...... To replicate in the host cell, viruses commandeer cellular signaling pathways. Cytomegalovirus (CMV) is a DNA virus with that is widespread in the population but usually causes disease only in immunocompromised individuals and is also a viral cause of birth defects. One of the actions of CMV in the host cell is to stimulate MAP kinase pathways. Both p38 and ERK kinases are activated by CMV infection through activation map kinase kinases and inhibition of phosphatases. One result of Map kinase activation by CMV is activation of transcription of viral genes, increasing the production of viral gene products. Both p38 and ERK kinases contribute to the activation of viral genes by cellular transcription factors acting through the viral UL4 promoter at upstream and basal transcription elements. Another target of prolonged p38 activation during infection is Rb, contributing to viral replication. Activation of MKK1 and MKK2 leads to Erk1 and Erk2 activation, and phosphorylation of downstream targets. The MEKK1 kinase regulates the immediate early promoter indirectly through downstream kinase signaling and perhaps more directly through activation of NF-kB. Map kinase pathways activated by CMV converge on increased transcription of viral genes and increased replication of the viral genome. Better understanding of the mechanisms involved in the interaction of CMV with cellular signaling machinery will provide improved ways to treat CMV-mediated disease. More...
TALL1_PATHWAY	tall1 pathway	TACI and BCMA stimulation of B cell immune responses.	TACI and BCMA signal transduction pathway that enhances cell...... TACI and BCMA signal transduction pathway that enhances cell survival APRIL and BAFF (also called TALL-I and BLyS) are TNF family members that act as ligands for the BCMA and TACI receptors. Both APRIL and BAFF bind to both the BCMA and TACI receptors to activate the humoral immune response, stimulating B cell immunoglobulin production and proliferation. BAFF is found as a membrane bound form in T cells and a soluble form that is released from the cell to stimulate B cell proliferation and differentiation. As members of the TNF receptor gene family, BCMA and TACI interact with TRAF family members to transduce signals downstream to NF-kappaB activation and MAP kinase pathways. Abnormally active BAFF or APRIL signaling may play a role in autoimmune disorders such as lupus. More...
STRESS_PATHWAY	stress pathway	TNF/Stress Related Signaling	TNF acts on several different signaling pathways through two...... TNF acts on several different signaling pathways through two cell surface receptors, TNFR1 and TNFR2 to regulate apoptotic pathways, NF-kB activation of inflammation, and activate stress-activated protein kinases (SAPKs). Interaction of TNFR1 with TRADD leads to activation of NF-kB and apoptosis pathways, while interaction with TRAF2 has generally been thought to be involved in stress kinase and NF-kB activation but is not required for TNF to induce apoptosis. Activation of NF-kB is mediated by TRAF2 through the NIK kinase and also by RIP but the observation that TNF activates NF-kB in mice lacking TRAF2 indicates that TRAF-2 does not play an essential role in this process. Stress-activated protein kinases, also called JNKs, are a family of map kinases activated by cellular stress and inflammatory signals. Binding of TNF to the TNFR1 receptor activates the germinal center kinase (GCK) through the TNF adaptor Traf2, activating the map kinase MEKK1. Both GCK and MEKK1 interact with Traf2, and GCK is required for MEKK1 activation by TNF, but GCK kinase activity does not appear to be required for MEKK1 activation. Instead, GCK activates MEKK1 by causing MEKK1 oligomerization and autophosphorylation. Tank increases the affinity of Traf2 for GCK to increase Map kinase activation by TNF. Once activated, MEKK1 stands at the top of a map kinase pathways leading to transcriptional regulation, including JNK phosphorylation of c-Jun to stimulate transcriptional activation by AP-1, a heterodimer of c-jun and fos or ATF proteins. The activation of the p38 Map kinase also contributes to AP-1 activation leading to the transcriptional activation of many stress and growth related genes. RIP has been suggested as a component of the p38 pathway in addition to playing a role in NF-kB activation. MEKK1 knockout mice support the role of MEKK1 in JNK activation in some cells but did not support MEKK1 dependent activation of NF-kB. Alternative redundant mechanisms may obscure the role of MEKK1 in NF-kB mechanisms. TNF activation of stress kinase pathways and downstream transcription factors may help to modulate the apoptotic pathways also activated by TNF. More...
BCR_PATHWAY	bcr pathway	BCR Signaling Pathway	Significant progress has been made towards delineation of th...... Significant progress has been made towards delineation of the intrinsic molecular processes that regulate B lymphocyte immune function. Recent observations have provided a clearer picture of the interactive signaling pathways that emanate from the mature B cell antigen receptor (BCR) complex and the different precursor complexes that are expressed during development. Studies have also revealed that the net functional response to a given antigenic challenge is affected by the combined action of BCR-dependent signaling pathways, as well as those originating from various coreceptors expressed by B cells (e.g. CD19, CD22, FcgRIIb and PIR-B). It is now well established that reversible tyrosine phosphorylation plays an important role in regulating B cell biology. In particular, binding of antigen to the BCR promotes the activation of several protein tyrosine kinases (PTK) that, in conjunction with protein tyrosine phosphatases (PTP), alter the homeostasis of reversible tyrosine phosphorylation in the resting B cell. The net effect is a transient increase in protein tyrosine phosphorylation that facilitates the phosphotyrosine dependent formation of effector protein complexes, promotes targeting of effector proteins to specific microenvironments within the B cell and initiates the catalytic activation of downstream effector proteins. Studies have demonstrated that Src family PTKs are activated initially and serve to phosphorylate CD79a and CD79b thereby creating phosphotyrosine motifs that recruit downstream signaling proteins. In particular, phosphorylation of the BCR complex leads to the recruitment and activation of the PTK Syk, which in turn promotes phosphorylation of PLCg, Shc and Vav. Additionally, the Tec family member Btk is recruited to the plasma membrane where it is involved in activation of PLCg. Initiation of B lymphocyte activation is dependent on the tyrosine phosphorylation-dependent formation of multi-molecular effector protein complexes that activate downstream signaling pathways. The formation of such complexes was initially hypothesized to occur primarily via effector protein binding to the BCR complex itself. However, recent studies have demonstrated that productive signaling via the BCR is in fact dependent on tyrosine phosphorylation of one or more adapter proteins that play a crucial role in recruitment and organization of effector proteins at the plasma membrane. The SLP-65/BLNK adapter protein has recently been shown to play a crucial role in recruitment and activation of key signal transducing effector proteins in the B cell. After the BCR has been engaged by antigen and the activation response has been initiated, numerous second messengers and intermediate signal transducing proteins are activated. These include the production of lipid second messengers by phosphatidylinositol 3-kinase, and the PLC-dependent hydrolysis of phosphatidylinositol 4,5-bisphosphate to yield diacylglycerol and 1,4,5-inositoltrisphosphate (IP3). DAG is important for activation of PKC whereas IP3 promote release of calcium from the endoplasmic reticulum and the subsequent influx Ca2+ from the extracellular space. Numerous intermediate signaling proteins are also activated including the Ras and Rap1, which are small molecular weight GTPases and these ultimately lead to the activation of MAP kinases including Erk, JNK and p38. The net effect of second messenger production and activation of intermediate signaling proteins is the concerted regulation of several transcription factors that mediate gene transcription in the B cell. More...
NFAT_PATHWAY	nfat pathway	NFAT and Hypertrophy of the heart (Transcription in the broken heart)	Hypertrophy associated with both hypertension and obstructio...... Hypertrophy associated with both hypertension and obstruction to ventricular outflow leads to pathologic cardiac growth and it is associated with increase morbidity and mortality. Symptomatic ventricular disease takes a growing toll on the health of nations. As other cardiovascular diseases such as stroke and myocardial infraction are in decline as causes of mortality, the heart failure problem becomes increasingly urgent. Congenital heart defects occur in 1% of live births and fetal heart malformations are implicated in many pregnancies that end in still-birth or spontaneous abortion. The current paradigm suggests that the heart adapts to excess of hemodynamic loading by compensatory hypertrophy, which under condition of persistent stress, over time evolves into dysfunction and myocardial failure. There is considerable evidence that direct effects of increased mechanical stress are sensed within the ventricular wall and that signals critical for the generation of growth responses. Despite compelling statistics we still do not understand biochemically why heart defects are so prevalent. A single transcriptional regulator initially associated with the activation of the T-cells More...
EGFR_SMRTE_PATHWAY	egfr smrte_pathway	Map Kinase Inactivation of SMRT Corepressor	Corepressors are coregulators that interact with transcripti...... Corepressors are coregulators that interact with transcriptional silencers in a variety of pathways such as cell proliferation, differentiation and apoptosis. Abnormal corepressor-silencer interactions have been implicated in a variety of human disease pathways including several types of leukemia. The regulation of the SMRT corepressor via the p38 and Mek-1 Kinase pathway is shown in this diagram. The EFG receptor represents one mechanism by which SMRT function is inhibited by the tyrosine kinase signaling pathway. The MEKK1 and p38 pathways are activated by EGF resulting in cross-regulation of SMRT. The induction of SMRT phosphorylation by each pathway is shown, causing SMRT to unbind from the transcription factor complexes represented by RXR, RAR, T3R and PLZF. More...
ARENRF2_PATHWAY	arenrf2 pathway	Oxidative Stress Induced Gene Expression Via Nrf2	Reactive oxygen species (ROS) can damage biological macromol...... Reactive oxygen species (ROS) can damage biological macromolecules and are detrimental to cellular health. Electrophilic compounds, xenobiotics and antioxidants are sources of reactive oxygen species, creating oxidative stress that can harm cells. Enzymes are involved in the Phase II detoxification of xenobiotics to reduce cellular stress include glutathione transferases, quinone reductase, epoxide hydrolase, heme oxygenase, UDP-glucuronosyl transferases, and gamma-glutamylcysteine synthetase. Expression of these genes protects cells from oxidative damage and can prevent mutagenesis and cancer. Transcription of these enzymes is coordinately regulated through antioxidant response elements (AREs). Nrf2 (NF-E2-related factor 2) and Nrf1 are transcription factors that bind to AREs and activate these genes. Inactive Nrf2 is retained in the cytosol by association a complex with the cytoskeletal protein Keap1. Cytosolic Nrf2 is phosphorylated and translocates into the nucleus in response to protein kinase C activation and Map kinase pathways. In the nucleus, Nrf2 activate genes through AREs by interacting with transcription factors in the bZIP family, including CREB, ATF4 and fos or jun. Nrf2 activation of genes is opposed by small maf proteins, including MafG and MafK, maintaining a counterbalance to Nrf2 and balancing the oxidation level of the intracellular environment. More...
TOLL_PATHWAY	toll pathway	Toll-Like Receptor Pathway	The innate immune response responds in a general manner to f...... The innate immune response responds in a general manner to factors present in invading pathogens. Bacterial factors such as lipopolysaccharides (LPS, endotoxin), bacterial lipoproteins, peptidoglycans and also CpG nucleic acids activate innate immunity as well as stimulating the antigen-specific immune response and triggering the inflammatory response. Members of the toll-like receptor (TLR) gene family convey signals stimulated by these factors, activating signal transduction pathways that result in transcriptional regulation and stimulate immune function. TLR2 is activated by bacterial lipoproteins, TLR4 is activated by LPS, and TLR9 is activated by CpG DNA; peptidoglycan recognition protein (PGRP) is activated by peptidoglycan (PGN). The downstream signaling pathways used by these receptors are similar to that used by the IL-1 receptor, activating the IL-1 receptor associated kinase (IRAK) through the MyD88 adaptor protein, and signaling through TRAF-6 and protein kinase cascades to activate NF-kB and Jun. NF-kB and c-Jun activate transcription of genes such as the proinflammatory cytokines IL-1 and IL-12. Several recent reports have suggested that the functional outcomes of signaling via TLR2, TLR4 and PGRP are not equivalent. For example, while the LPS-induced, p38-dependent response was dependent upon PU.1 binding, the PGN-induced, p38 response was not. The intracelular receptor for PGN, PGRP is conserved from insects to mammals. In insects, PGRP activates prophenoloxidase cascade, a part of the insect antimicrobial defense system. Because mammals do not have the prophenoloxidase cascade, its function in mammals is unknown. However, it was suggested that an identical protein Tag7 was a tumor necrosis factor-like (TNF-like) cytokine. PGRP/Tag7 possesses cytotoxicity and triggers intranucleosomal DNA fragmentation in target cells in the same way as many known members of the TNF family. Fragmentation of DNA is one of the characteristics of apoptosis. The possibility that in another system, PGRP/Tag7 would induce NF-kB activation, as observed for TRAIL (TNF-related apoptosis-inducing ligand) receptors canot be ruled out. More...
IL1R_PATHWAY	il1r pathway	Signal transduction through IL1R	Interleukin-1 (IL-1) is a pro-inflammatory cytokine that sig...... Interleukin-1 (IL-1) is a pro-inflammatory cytokine that signals primarily through the type 1 IL-1 receptor (IL-1R1). The activities of IL-1 include induction of fever, expression of vascular adhesion molecules, and roles in arthritis and septic shock. The inflammatory activities of IL-1 are partially derived by transcriptionally inducing expression of cytokines such as TNF-alpha and interferons, as well as inducing the expression of other inflammation-related genes. There are two forms of IL-1 encoded by distinct genes, IL-1 alpha and IL-1 beta. IL-1 beta is produced as a 269 amino acid precursor that is cleaved by IL-1beta converting enzyme (ICE) to the active IL-1 beta form that is secreted. IL-1 signaling is opposed by the naturally occurring peptide IL-1 receptor antagonist which is a therapeutic agent for the treatment of arthritis. The type 1 IL-1 receptor protein binds IL-1 beta but requires the IL-1 receptor accessory protein (IL-1RAcP) to transduce a signal. IL-1 binding causes activation of two kinases, IRAK-1 and IRAK-2, associated with the IL-1 receptor complex. IRAK-1 (IL-1 Receptor Associated Kinase) activates and recruits TRAF6 to the IL-1 receptor complex. TRAF6 activates two pathways, one leading to NF-kB activation and another leading to c-jun activation. The TRAF associated protein ECSIT leads to c-Jun activation through the Map kinase/JNK signaling system. TRAF6 also signals through the TAB1/TAK1 kinases to trigger the degradation of I-kB, and activation of NF-kB. The IL-1 signaling cascade represents a highly conserved response to pathogens through evolution, with homologs in insects and even in plants. The signal transduction cascade utilized by IL-1 receptor is similar to that of TNF, resulting in NF-kB activation, and is most similar to that of the Toll-like receptors that also participate in inflammatory signaling responses to pathogen components like endotoxin. More...
HDAC_PATHWAY	hdac pathway	Control of skeletal myogenesis by HDAC and calcium/calmodulin-dependent kinase (CaMK)	The differentiation of muscle cells is transcriptionally reg...... The differentiation of muscle cells is transcriptionally regulated, in part by the myocyte enhancer factor-2, MEF2. During myogenesis MEF2 binds to MyoD and other basic helix-loop-helix factors to activate transcription of genes involved in muscle cell differentiation. Transcriptional activation by MEF2 is blocked by interaction with HDAC5 and other histone deacetylases. In undifferentiated myoblasts, HDAC5 is present in the nucleus where it binds to MEF2 to block activation of muscle genes. When activated by IGF-1 signaling, CaM kinase phosphorylates HDAC proteins, causing them to be exported from the nucleus, releasing the block on MEF2 transcriptional activation and allowing differentiation to proceed. Transcription cofactors also interact with MEF2 to contribute to gene regulation and myogenesis. The transcriptional regulator NFAT, for example, acts as a cofactor for MEF2 when calcium and calcineurin signaling activate it. There are four members of the Mef2 gene family, Mef2a-2d. Mef2a is expressed in brain, heart and skeletal muscle. Mef2c is involved in myogenesis in cardiac and skeletal muscle. Mef2d is widely expressed, and may be involved in the regulation of T cell function as well as muscle. Several factors regulate Mef2 transcription factors, including Map kinases and histone deacetylase (HDAC) enzymes. Mef2 is phosphorylated by p38 map kinase, and phosphorylation of Mef2c by p38 contributes to skeletal muscle differentiation. BMK-1 (also called Erk5) is another member of the Map kinase family that regulates the activity of Mef2 family members and is unique in that it appears itself to possess a transcriptional activation domain and act as a transcriptional coactivator. Mekk3 disruption prevented normal cardiovascular development in mice and appears to signal through p38 and Mef2c in normal cardiovascular development. More...
RB_PATHWAY	rb pathway	RB Tumor Suppressor/Checkpoint Signaling in response to DNA damage	Cell cycle checkpoint controls at the G1 to S transition and...... Cell cycle checkpoint controls at the G1 to S transition and the G2 to M transition prevent the cell cycle from progressing when DNA is damaged. The ATM protein kinase detects DNA damage and in response to this activates DNA repair factors and inhibits cell cycle progression. Two of the proteins that ATM phosphorylates in response to DNA damage are the tumor suppressor p53 and the checkpoint kinase chk1. In turn, the tumor suppressor p53 interacts with p21 to block the activity of cdk2 (cyclin dependent kinase 2) preventing passage from G1 to S phase and harmful replication of damaged DNA. One of the targets of cdk2 is the Rb gene product, another tumor suppressor. When dephosphorylated, Rb interacts with E2F transcription factors and prevents transcription of genes required for progression through the cell cycle. When phosphorylated by cell cycle dependent kinases like cdk2 and cdk4, Rb no longer interacts with E2F and the cell cycle proceeds through the G1-S checkpoint. DNA damage also regulates the G2-M phase transition by acting on the cell cycle regulator cdc2. More...

MAPK14 related Reactome pathways (count: 23)

ID	Name	Description
Gene mapped Reactome pathways
REACT_12033	signalling to_ras	Signalling through Shc adaptor proteins appears to be identi...... Signalling through Shc adaptor proteins appears to be identical for both NGF and EGF. It leads to a fast, but transient, MAPK/ERK activation, which is insufficient to explain the prolonged activation of MAPK found in NGF-treated cells. More...
REACT_6966	toll receptor_cascades	In human, ten members of the Toll-like receptor (TLR) family...... In human, ten members of the Toll-like receptor (TLR) family (TLR1-TLR10) have been identified (TLR11 has been found in mouse, but not in human). All TLRs have a similar Toll/IL-1 receptor (TIR) domain in their cytoplasmic region and an Ig-like domain in the extracellular region, where each is enriched with a varying number of leucine-rich repeats (LRRs). Each TLR can recognize specific microbial pathogen components. The binding pathogens component of the TLRs initializes signaling pathways that lead to induction of Interferon alpha/beta. There are three main signaling pathways: the first is a MyD88-dependent pathway that is common to all TLRs, except TLR3; the second is a TRAM-dependent pathway that is peculiar to TLR3 and TLR4 and is mediated by TRIF and RIP1; and the third is a TRAF6-mediated pathway peculiar to TLR3. More...
REACT_12065	p38mapk events	NGF induces sustained activation of p38, a member of the MAP...... NGF induces sustained activation of p38, a member of the MAPK family. Both p38 and the ERKs appear to be involved in neurite outgrowth and differentiation caused by NGF in PC12 cells. As a matter of fact, PC12 cell differentiation appears to involve activation of both ERK/MAPK and p38. Both ERK/MAPK and p38 pathways contribute to the phosphorylation of the transcription factor CREB and the activation of immediate-early genes. p38 activation by NGF may occur by at least two mechanisms, involving SRC or MEK kinases. More...
REACT_19140	adp signalling_through_p2y_purinoceptor_1	Co-activation of P2Y1 and P2Y12 is necessary for complete pl...... Co-activation of P2Y1 and P2Y12 is necessary for complete platelet activation. P2Y1 is coupled to Gq and helps trigger the release of calcium from internal stores, leading to weak and reversible platelet aggregation. P2Y12 is Gi coupled, and required for the amplification of aggregation induced by all platelet agonists including collagen, thrombin, thromboxane, adrenaline and serotonin. P2Y12 activation leads to irreversible platelet aggregation. More...
REACT_21326	activation of_the_ap1_family_of_transcription_factors	Activator protein-1 (AP-1) is a collective term referring to...... Activator protein-1 (AP-1) is a collective term referring to a group of transcription factors that bind to promoters of target genes in a sequence-specific manner. AP-1 family consists of hetero- and homodimers of bZIP (basic region leucine zipper) proteins, mainly of Jun-Jun, Jun-Fos or Jun-ATF. AP-1 members are involved in the regulation of a number of cellular processes including cell growth, proliferation, survival, apoptosis, differentiation, cell migration. The ability of a single transcription factor to determine a cell fate critically depends on the relative abundance of AP-1 subunits, the composition of AP-1 dimers, the quality of stimulus, the cell type, the co-factor assembly. AP-1 activity is regulated on multiple levels; transcriptional, translational and post-translational control mechanisms contribute to the balanced production of AP-1 proteins and their functions. Briefly, regulation occurs through: effects on jun, fos, atf gene transcription and mRNA turnover. AP-1 protein members turnover. post-translational modifications of AP-1 proteins that modulate their transactivation potential (effect of protein kinases or phosphatases). interactions with other transcription factors that can either induce or interfere with AP-1 activity. More...
REACT_604	hemostasis	Two principal mechanisms limit blood loss after vascular inj...... Two principal mechanisms limit blood loss after vascular injury. Initially, platelets are activated, adhere to the site of the injury, and aggregate into a plug that limits blood loss. Proteins and small molecules released from activated platelets stimulate the plug formation process, and fibrinogen from the plasma forms bridges between activated platelets. These events allow the initiation of the clotting cascade, the second mechanism to limit blood loss. Negatively charged phospholipids exposed on cell surfaces at the site of injury and on activated platelets interact with tissue factor, setting off a cascade of reactions leading to generation of fibrin and the formation of an insoluble fibrin clot that strengthens the platelet plug. More...
REACT_12599	erk mapk_targets	ERK/MAPK kinases have a number of targets within the nucleus...... ERK/MAPK kinases have a number of targets within the nucleus, usually transcription factors or other kinases. The best known targets, ELK1, ETS1, ATF2, MITF, MAPKAPK2, MSK1, RSK1/2/3 and MEF2 are annotated here. More...
REACT_622	platelet activation_triggers	In the initial response to injury, platelets adhere to damag...... In the initial response to injury, platelets adhere to damaged blood vessels, responding to the exposure of collagen from the vascular epithelium. Once adhered they degranulate, releasing agents such as serotonin and ADP and synthesize Thromboxane A2, all of which amplify the response, recruiting further platelets to the area and promoting platelet aggregation. More...
REACT_12056	trka signalling_from_the_plasma_membrane	Trk receptors signal from the plasma membrane and from intra...... Trk receptors signal from the plasma membrane and from intracellular membranes, particularly from early endosomes. Signalling from the plasma membrane is fast but transient; signalling from endosomes is slower but long lasting. Signalling from the plasma membrane is annotated here. TRK signalling leads to proliferation in some cell types and neuronal differentiation in others. Proliferation is the likely outcome of short term signalling, as observed following stimulation of EGFR (EGF receptor). Long term signalling via TRK receptors, instead, was clearly shown to be required for neuronal differentiation in response to neurotrophins. More...
REACT_20524	signal amplification	In the initial response to injury, platelets adhere to damag...... In the initial response to injury, platelets adhere to damaged blood vessels, responding to the exposure of collagen from the vascular epithelium. Once adhered they degranulate, releasing agents such as serotonin and ADP and synthesize Thromboxane A2, all of which amplify the response, recruiting further platelets to the area and promoting platelet aggregation. More...
REACT_12433	nuclear events_kinase_and_transcription_factor_activation	An important function of the kinase cascade triggered by neu...... An important function of the kinase cascade triggered by neurotrophins is to induce the phosphorylation and activation of transcription factors in the nucleus to initiate new programs of gene expression. Transcription factors directly activated by neurotrophin signalling are responsible for induction of immediate-early genes, many of which are transcription factors. These in turn are involved in the induction of delayed-early genes. More...
REACT_6783	toll like_receptor_3_cascade	Toll-like receptor 3 (TLR3) as was shown for mammals is expr...... Toll-like receptor 3 (TLR3) as was shown for mammals is expressed on myeloid dendritic cells, respiratory epithelium, macrophages, and appears to play a central role in mediating the antiviral and inflammatory responses of the innate immunity in combating viral infections. Mammalian TLR3 recognizes dsRNA, and that triggers the receptor to induce the activation of NF-kappaB and the production of type I interferons (IFNs). dsRNA-stimulated phosphorylation of two specific TLR3 tyrosine residues (Tyr759 and Tyr858) is essential for initiating TLR3 signaling pathways. More...
REACT_6782	traf6 mediated_induction_of_the_antiviral_cytokine_ifn_alpha_beta_cascade	In human, together with ubiquitin-conjugating E2-type enzyme...... In human, together with ubiquitin-conjugating E2-type enzymes UBC13 and UEV1A and IKK(NEMO), leading to the activation of the kinases. Xia et all., 2009 demonstrated in vitro that unlike polyubiquitin chains covalently attached to TRAF6 or IRAK, TAB2 and NEMO-associated ubiquitin chains were found to be unanchored and susceptible to N-terminal ubiquitin cleavage. Only K63-linked polyubiquitin chains, but not monomeric ubiquitin, activated TAK1 in a dose-dependent manner.Optimal activation of the IKK complex was achieved using ubiquitin polymers containing both K48 and K63 linkages. Furthermore, the authors proposed that the TAK1 complexes might be brougt in close proximity by binding several TAB2/3 to a single polyubiquitin chain to facilitate TAK1 kinases trans-phosphorylation. Alternativly, the possibility that polyUb binding promotes allosteric activation of TAK1 complex should be considered. More...
REACT_20	formation of_platelet_plug	Hemostasis is a physiological response that culminates in th...... Hemostasis is a physiological response that culminates in the arrest of bleeding from an injured vessel. Acute vessel injury results in its constriction to reduce the loss of blood. Under normal conditions vascular endothelium supports vasodilation, inhibits platelet adhesion and activation, suppresses coagulation, enhances fibrin cleavage and is anti-inflammatory in character. Under acute vascular trauma vasoconstrictor mechanisms predominate and the endothelium becomes prothrombotic, procoagulatory and proinflammatory in nature. This is achieved by a reduction of endothelial dilating agents: adenosine, NO and prostacyclin; and the direct action of ADP, serotonin and thromboxane on vascular smooth muscle cells to elicit their contraction. The chief trigger for the change in endothelial function that leads to the formation of haemostatic thrombus is the loss of the endothelial cell barrier between blood and ECM components. Circulating platelets identify and discriminate areas of endothelial lesions; here, they adhere to the exposed sub endothelium. Their interaction with the various thrombogenic substrates and locally generated or released agonists results in platelet activation. This process is described as possessing two stages, firstly, adhesion - the initial tethering to a surface, and secondly aggregation - the platelet-platelet cohesion. More...
REACT_12058	signalling to_erks	Neurotrophins utilize multiple pathways to activate ERKs (ER...... Neurotrophins utilize multiple pathways to activate ERKs (ERK1 and ERK2), a subgroup of the large MAP kinase (MAPK) family, from the plasma membrane. The major signalling pathways to ERKs are via RAS, ocurring from caveolae in the plasma membrane or from clathrin-coated vesicles, and via RAP1, taking place in early endosomes. Whereas RAS activation by NGF is transient, RAP1 activation by NGF is sustained for hours. More...
REACT_21328	mapk targets_nuclear_events_mediated_by_map_kinases	MAPKs are protein kinases that, once activated, phosphorylat...... MAPKs are protein kinases that, once activated, phosphorylate their specific cytosolic or nuclear substrates at serine and/or threonine residues. Such phosphorylation events can either positively or negatively regulate substrate, and thus entire signaling cascade activity. The major cytosolic target of activated ERKs are RSKs. Other ERK nuclear targets include c-Myc, HSF1 (Heat-Shock Factor-1), STAT1/3 (Signal Transducer and Activator of Transcription-1/3), and many more transcription factors. Activated p38 MAPK is able to phosphorylate a variety of substrates, including transcription factors STAT1, p53, ATF2 (Activating transcription factor 2), MEF2 (Myocyte enhancer factor-2), protein kinases MSK1, MNK, MAPKAPK2/3, death/survival molecules (Bcl2, caspases), and cell cycle control factors (cyclin D1). JNK, once activated, phosphorylates a range of nuclear substrates, including transcription factors Jun, ATF, Elk1, p53, STAT1/3 and many other factors. JNK has also been shown to directly phosphorylate many nuclear hormone receptors. For example, peroxisome proliferator-activated receptor 1 (PPAR-1) and retinoic acid receptors RXR and RAR are substrates for JNK. Other JNK targets are heterogeneous nuclear ribonucleoprotein K (hnRNP-K) and the Pol I-specific transcription factor TIF-IA, which regulates ribosome synthesis. Other adaptor and scaffold proteins have also been characterized as nonnuclear substrates of JNK. More...
REACT_798	platelet activation	Platelet activation begins with the initial binding of adhes...... Platelet activation begins with the initial binding of adhesive ligands and of the excitatory platelet agonists. Intracellular signaling reactions will then enhance the adhesive and procoagulant properties of tethered platelets or of platelets circulating in the proximity. From the subendothelial adhesive substrates, collagen and possibly vWF are the main inducers of platelet activation. GP VI is the most potent collagen receptor initiating signal generation, an ability derived from its interaction with the FcRI gamma chain. This results in the phosphorylation of the gamma-chain by the non-receptor tyrosine kinases of the Src family. The phosphotyrosine motif is recognized by the SH2 domains of Syk, a tyrosine kinase. This association activates the Syk enzyme, leading to activation. Four PARs are identified, of which PARs 1 ,3 and 4 are substrates for thrombin. PAR 1 is the predominant thrombin receptor, PAR 3 is minimally expressed and PAR 4 is less responsive to thrombin. Platelets do not store PAR1, due to limited protein synthesis, they are capable of responding to thrombin only once. Platelet activation further results in the scramblase-mediated transport of negatively-charged phospholipids to the platelet surface. These phospholipids provide a catalytic surface (with the charge provided by phosphatidylserine and phosphatidylethanolamine) for the tenase complex (formed by the activated forms of the blood coagulation factors factor VIII and factor I). More...
REACT_6900	signaling in_immune_system	Humans are exposed to millions of potential pathogens daily,...... Humans are exposed to millions of potential pathogens daily, through contact, ingestion, and inhalation. Our ability to avoid infection depends on the adaptive immune system and during the first critical hours and days of exposure to a new pathogen, our innate immune system. More...
REACT_11061	signalling by_ngf	Neurotrophins (NGF, BDNF, NT-3, NT-4/5) play pivotal roles i...... Neurotrophins (NGF, BDNF, NT-3, NT-4/5) play pivotal roles in survival, differentiation, and plasticity of neurons in the peripheral and central nervous system. They are produced, and secreted in minute amounts, by a variety of tissues. They signal through two types of receptors: TRK tyrosine kinase receptors (TRKA, TRKB, TRKC), which specifically interact with the different neurotrophins, and p75NTR, which interacts with all neurotrophins. TRK receptors are reported in a variety of tissues in addition to neurons. p75NTRs are also widespread. Neurotrophins and their receptors are synthesized as several different splice variants, which differ in terms of their biological activities. The nerve growth factor (NGF) was the first growth factor to be identified and has served as a model for studying the mechanisms of action of neurotrophins and growth factors. The mechanisms by which NGF generates diverse cellular responses have been studied extensively in the rat pheochromocytoma cell line PC12. When exposed to NGF, PC12 cells exit the cell cycle and differentiate into sympathetic neuron-like cells. Current data show that signalling by the other neurotrophins is similar to NGF signalling. More...
REACT_6802	innate immunity_signaling	Innate immunity encompases the nonspecific part of immunity ...... Innate immunity encompases the nonspecific part of immunity tha are part of an individual's natural biologic makeup More...
REACT_21303	myogenessis
REACT_21308	map kinases_activation_in_tlr_cascade	Mitogen activated protein kinase. There are three major grou...... Mitogen activated protein kinase. There are three major groups of MAP kinases the extracellular signal-regulated protein kinases ERK1/2. the p38 MAP kinase. the c-Jun NH-terminal kinases JNK. ERK1 and ERK2 are activated in response to growth stimuli. Both JNKs and p38-MAPK are activated in response to a variety of cellular and environmental stresses. The MAP kinases are activated by dual phosphorylation of Thr and Tyr within the tripeptide motif Thr-Xaa-Tyr. The sequence of this tripeptide motif is different in each group of MAP kinases: ERK (Thr-Glu-Tyr); p38 (Thr-Gly-Tyr); and JNK (Thr-Pro-Tyr). MAPK activation is mediated by signal transduction in the conserved three-tiered kinase cascade: MAPKKKK (MAP4K or MKKKK or MAPKKK Kinase) activates the MAPKKK. The MAPKKKs then phosphorylates a dual-specificity protein kinase MAPKK, which in turn phosphorylates the MAPK. The dual specificity MAP kinase kinases (MAPKK or MKK) differ for each group of MAPK. The ERK MAP kinases are activated by the MKK1 and MKK2; the p38 MAP kinases are activated by MKK3, MKK4, and MKK6; and the JNK pathway is activated by MKK4 and MKK7. The ability of MAP kinase kinases (MKKs, or MEKs) to recognize their cognate MAPKs is facilitated by a short docking motif (the D-site) in the MKK N-terminus, which binds to a complementary region on the MAPK. MAPKs then recognize many of their targets using the same strategy, because many MAPK substrates also contain D-sites. The upstream signaling events in the TLR cascade that initiate and mediate the ERK signaling pathway remain unclear. More...
REACT_21399	activated tak1_mediates_p38_mapk_activation	p38 mitogen-activated protein kinase (MAPK) belong to a high...... p38 mitogen-activated protein kinase (MAPK) belong to a highly conserved family of serine/threonine protein kinases. The p38 pathway is activated by pro-inflammatory or stressful stimuli. Various stressors, such as ultraviolet (UV) radiation, oxidative injury, heat shock, cytokines, and other pro-inflammatory stimuli, are known to trigger induction of the p38 MAPK-dependent signaling cascade. p38 MAPK exists as four isoforms (alpha, beta, gamma, and delta). Of these, p38alpha and p38beta are ubiquitously expressed while p38gamma and p38delta are differentially expressed depending on tissue type. Each isoform is activated by upstream kinases including MAP kinase kinases (MKK) 3, 4, and 6, which in turn are phosphorylated by activated TAK1 at the typical Ser-Xaa-Ala-Xaa-Thr motif in their activation loop. Once p38 MAPK is phosphorylated it activates numerous downstream substrates, including MAPK-activated protein kinase-2 and 3 (MAPKAPK-2 or 3) and mitogen and stress-activated kinase-1/2 (MSK1/2). MAPKAPK-2/3 and MSK1/2 function to phosphorylate heat shock protein 27 (HSP27) and cAMP-response element binding protein transcriptional factor, respectively. Other transcription factors, including activating transcription factor 2, Elk, CHOP/GADD153, and myocyte enhancer factor 2, are known to be regulated by these kinases. More...

MAPK14 related interactors from protein-protein interaction data in HPRD (count: 84)

Gene	Interactor	Interactor in MK4MDD?	Experiment Type	PMID
MAPK14	MAPK3	No	in vitro;in vivo	12697810
MAPK14	MKNK1	No	in vitro	9155018
MAPK14	SHC1	No	in vivo	15688026
MAPK14	MAFA	No	in vitro;in vivo	11416124
MAPK14	MAP2K3	No	in vitro	7750576 , 8622669
MAPK14	ATF2	No	in vitro;in vivo	7535770 , 12110590 , 11259586 , 10085140
MAPK14	NCOA3	No	in vivo	16135815 , 15383283
MAPK14	DUSP1	No	in vivo	7535770
MAPK14	SMAD7	No	in vitro;in vivo	12589052
MAPK14	SCN8A	No	in vivo	16014723
MAPK14	ELK1	No	in vitro	8622669 , 9130707 , 8548291
MAPK14	GRB2	No	in vitro	8695800
MAPK14	NUP153	No	in vitro	17255949
MAPK14	AIMP1	No	yeast 2-hybrid	9878398
MAPK14	DUSP10	No	in vitro;yeast 2-hybrid	10391943 , 10597297 , 11359773
MAPK14	MAP2K6	No	in vitro;in vivo	8626699 , 7750576 , 8622669 , 16342939 , 9808624
MAPK14	FKBP8	No	yeast 2-hybrid	16169070
MAPK14	CDC25B	No	in vitro	15629715
MAPK14	RET	No	in vitro	16153436
MAPK14	ZNHIT1	No	in vitro;yeast 2-hybrid	17380123
MAPK14	MAP3K7IP1	No	in vitro	11847341
MAPK14	EIF4EBP1	No	in vitro	11777913
MAPK14	TRAF6	No	in vivo	10346818
MAPK14	EEF2K	No	in vitro	12171600
MAPK14	MBP	Yes	in vitro	15728454
MAPK14	DYRK1B	No	in vitro	10910078
MAPK14	PLA2G4A	No	in vivo	9468497
MAPK14	DUSP4	Yes	in vivo	11387337
MAPK14	HNF4A	No	in vitro	16351573
MAPK14	GMFB	No	in vivo	8798479
MAPK14	PML	No	in vitro;in vivo	15273249
MAPK14	ESR1	Yes	in vitro;in vivo	12138194
MAPK14	CDX2	No	in vitro	16027724
MAPK14	RPS6KA4	No	in vitro;in vivo;yeast 2-hybrid	9792677 , 10806207
MAPK14	EEA1	No	in vitro;in vivo	16138080
MAPK14	FLNA	No	in vivo	11390380
MAPK14	MAPK8	Yes	in vivo	15778365
MAPK14	SPAG9	No	in vitro	12391307
MAPK14	MKNK2	No	in vitro	12897141
MAPK14	BCL2	No	in vivo	11495898
MAPK14	MEF2A	No	in vitro;in vivo	10330143 , 9858528 , 10849446
MAPK14	FAM48A	No	in vivo;yeast 2-hybrid	16751104
MAPK14	KRT18	No	in vivo	11788583
MAPK14	CSNK2A2	No	in vivo	10747897
MAPK14	NCF1	No	in vitro	15629715
MAPK14	MAP2K4	No	in vitro;in vivo	7716521 , 9808624
MAPK14	STK39	No	in vitro	10980603
MAPK14	ZFP36L1	No	yeast 2-hybrid	16189514
MAPK14	DUSP7	No	in vivo	9788880
MAPK14	GADD45A	No	in vitro;in vivo	12748288
MAPK14	STAT1	No	in vitro	11226159
MAPK14	MAP3K7	No	in vivo	12589052
MAPK14	DUSP22	No	in vitro;in vivo	11346645
MAPK14	MAX	No	in vitro	7479834
MAPK14	MEF2C	No	in vitro;in vivo	10330143 , 9753748 , 10805738 , 9069290
MAPK14	JDP2	No	in vitro;in vivo	12225289 , 11602244
MAPK14	HTRA2	No	in vivo;yeast 2-hybrid	10644717
MAPK14	MARS	No	in vitro	9878398
MAPK14	MAP2K1	No	in vitro;in vivo	12697810
MAPK14	IRAK1	No	in vitro	10346818
MAPK14	HSF4	No	in vitro	16581800
MAPK14	MAPKAPK3	No	in vitro;in vivo	11157753
MAPK14	ELK3	Yes	in vitro	11042694
MAPK14	CDC25C	No	in vitro	11333986 , 10557092 , 9278512 , 11551930
MAPK14	CREB1	Yes	in vivo	11377386
MAPK14	DUSP2	Yes	in vivo	7535770
MAPK14	MITF	No	in vitro;in vivo	11792706
MAPK14	STAT4	No	in vitro;in vivo	10961885
MAPK14	PPARGC1A	No	in vitro;in vivo	11741533
MAPK14	SMAD3	No	in vitro;in vivo	14512875
MAPK14	JUNB	No	in vitro	9889198 , 8917518
MAPK14	DDIT3	No	in vitro	8650547
MAPK14	MAPK1	Yes	in vitro	12697810 , 17255949
MAPK14	ZFYVE20	No	in vitro;in vivo	16138080
MAPK14	CSNK2B	No	in vivo	10747897
MAPK14	SLC9A1	No	in vitro;in vivo	11604491
MAPK14	DUSP16	No	in vitro;in vivo	11359773 , 11489891 , 14586399
MAPK14	DUSP9	No	yeast 2-hybrid	11988087
MAPK14	PTPN7	No	in vitro	10559944 , 10206983 , 10415025
MAPK14	MAPKAPK5	No	in vitro	9628874
MAPK14	KRT8	No	in vitro;in vivo	11788583 , 11781324 , 9211903
MAPK14	NFATC4	No	in vitro;in vivo	11997522
MAPK14	NFATC1	No	in vitro;in vivo	15304486
MAPK14	MAPKAPK2	No	in vitro;in vivo;yeast 2-hybrid	8846784 , 7592979 , 9768359

Gene Report

Literature-origin GO terms

Gene mapped GO terms

Literature-origin KEGG pathway

Gene mapped KEGG pathways

Literature-origin BioCarta pathway

Gene mapped BioCarta pathways

Gene mapped Reactome pathways