POLR3D

This gene complements a temperature-sensitive mutant isolated from the BHK-21 Syrian hamster cell line. It leads to a block in progression through the G1 phase of the cell cycle at nonpermissive temperatures. [provided by RefSeq]

Full Name

polymerase (RNA) III (DNA directed) polypeptide D, 44kDa

Function

DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. Specific peripheric component of RNA polymerase III which synthesizes small RNAs, such as 5S rRNA and tRNAs. 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 (By similarity).

Biological Process

Defense response to virusIEA:UniProtKB-KW
Innate immune responseIEA:UniProtKB-KW
Positive regulation of innate immune responseManual Assertion Based On ExperimentIDA:UniProtKB
Positive regulation of interferon-beta productionManual Assertion Based On ExperimentIDA:UniProtKB
Transcription by RNA polymerase IIIIEA:InterPro

Cellular Location

Nucleus