CRCP
Function
DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates (PubMed:20413673, PubMed:33558764, PubMed:34675218). Specific peripheric component of RNA polymerase III (Pol III) which synthesizes small non-coding RNAs including 5S rRNA, snRNAs, tRNAs and miRNAs from at least 500 distinct genomic loci. With POLR3H/RPC8 forms a mobile stalk that protrudes from Pol III core and functions primarily in transcription initiation (By similarity) (PubMed:20413673, PubMed:33558764, PubMed:33558766, PubMed:34675218). Pol III plays a key role in sensing and limiting infection by intracellular bacteria and DNA viruses. Acts as nuclear and cytosolic DNA sensor involved in innate immune response. Can sense non-self dsDNA that serves as template for transcription into dsRNA. The non-self RNA polymerase III transcripts, such as Epstein-Barr virus-encoded RNAs (EBERs) induce type I interferon and NF-kappa-B through the RIG-I pathway (PubMed:19609254, PubMed:19631370).
Accessory protein for the calcitonin gene-related peptide (CGRP) receptor. It modulates CGRP responsiveness in a variety of tissues.
Sequence Similarities
Belongs to the eukaryotic RPC9 RNA polymerase subunit family.
Tissue Specificity
Ubiquitous. Most prevalent in testis.
Cellular localization
- Nucleus
- Cell membrane
- Peripheral membrane protein
- Cytoplasmic side
Alternative names
DNA-directed RNA polymerase III subunit RPC9, RNA polymerase III subunit C9, Calcitonin gene-related peptide-receptor component protein, CGRP-RCP, CGRP-receptor component protein, CGRPRCP, HsC17, CRCP