Reactome Pathway Report
Basic Information
| ID |
|
| Name |
rna polymerase_iii_transcription
|
| Description |
RNA polymerase III is one of three types of nuclear RNA polymerases present in eucaryotic cells. About 10% of the total transcription in dividing cells can be attributed to its activity. It synthesizes an eclectic collection of catalytic or structural RNA molecules, some of which are involved in protein synthesis, pre-mRNA splicing, tRNA processing, and the control of RNA polymerase II elongation, whereas some others have still unknown functions. Like other RNA polymerases, RNA polymerase III cannot recognize its target promoters directly. Instead it is recruited to specific promoter sequences through the help of transcription factors. There are three basic types of RNA polymerase III promoters, called types 1, 2, and 3. Although in vivo, RNA polymerase III may be recruited to these promoters as part of a large complex , in vitro the reaction can be divided into several steps. First, the promoter elements are recognized by DNA binding factors, which then recruit a factor known as TFIIIB. TFIIIB itself then directly contacts RNA polymerase III. In human cells but not in S. cerevisiae, there are at least two versions of TFIIIB. One contains TBP, Bdp1, and Brf1.
|
REACT_1371 related genes in MK4MDD (count: 1)
| Approved Symbol |
Approved Name |
Type |
No. of Studies (Positive/Negative) |
| BRF2 |
BRF2, subunit of RNA polymerase III transcription initiation factor, BRF1-like |
Literature-origin
|
1(1/0) |
