Hmdb loader
Identification
HMDB Protein ID HMDBP00752
Secondary Accession Numbers
  • 6027
Name DNA-directed RNA polymerase III subunit RPC2
Synonyms
  1. C128
  2. DNA-directed RNA polymerase III 127.6 kDa polypeptide
  3. DNA-directed RNA polymerase III subunit B
  4. RNA polymerase III subunit C2
Gene Name POLR3B
Protein Type Enzyme
Biological Properties
General Function Involved in DNA-directed RNA polymerase activity
Specific Function DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. Second largest core component of RNA polymerase III which synthesizes small RNAs, such as 5S rRNA and tRNAs. Proposed to contribute to the polymerase catalytic activity and forms the polymerase active center together with the largest subunit. Pol III is composed of mobile elements and RPC2 is part of the core element with the central large cleft and probably a clamp element that moves to open and close the cleft (By similarity). 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.
Pathways
  • Cytosolic DNA-sensing pathway
  • Epstein-Barr virus infection
  • Purine metabolism
  • Pyrimidine metabolism
  • RNA polymerase
Reactions
Nucleoside triphosphate + RNA(n) → Pyrophosphate + RNA(n+1) details
Adenosine triphosphate + RNA → Pyrophosphate + RNA details
Guanosine triphosphate + RNA → Pyrophosphate + RNA details
Cytidine triphosphate + RNA → Pyrophosphate + RNA details
Uridine triphosphate + RNA → Pyrophosphate + RNA details
GO Classification
Biological Process
termination of RNA polymerase III transcription
transcription elongation from RNA polymerase III promoter
positive regulation of innate immune response
positive regulation of interferon-beta production
defense response to virus
innate immune response
transcription, DNA-dependent
Cellular Component
nucleoplasm
Function
binding
catalytic activity
transferase activity
transferase activity, transferring phosphorus-containing groups
nucleoside binding
nucleotidyltransferase activity
nucleic acid binding
dna binding
rna polymerase activity
dna-directed rna polymerase activity
ribonucleoside binding
Molecular Function
ribonucleoside binding
metal ion binding
DNA-directed RNA polymerase activity
DNA binding
Process
macromolecule biosynthetic process
cellular macromolecule biosynthetic process
metabolic process
biosynthetic process
transcription
Cellular Location
  1. Nucleus
Gene Properties
Chromosome Location 12
Locus 12q23.3
SNPs POLR3B
Gene Sequence
>3402 bp
ATGGACGTGCTAGCGGAGGAGTTTGGGAACCTGACTCCGGAGCAGCTGGCGGCGCCGATC
CCGACTGTAGAGGAAAAATGGAGGCTGCTTCCAGCATTTTTAAAGGTGAAAGGCCTTGTG
AAACAGCATATAGATTCATTTAACTATTTCATTAATGTAGAGATAAAGAAGATAATGAAA
GCCAATGAAAAGGTTACAAGTGACGCTGACCCTATGTGGTACTTAAAATATCTTAATATC
TATGTTGGGCTTCCTGATGTTGAAGAAAGCTTCAATGTAACTAGACCAGTGTCCCCTCAT
GAGTGCCGTTTGAGAGACATGACATACTCTGCCCCTATTACAGTGGATATTGAATATACC
CGAGGCAGCCAGAGGATCATCCGCAATGCCTTACCTATCGGCAGAATGCCCATAATGCTA
CGTAGTTCAAACTGTGTTCTTACAGGAAAAACGCCAGCAGAATTTGCCAAACTGAACGAA
TGTCCCTTAGATCCAGGTGGCTACTTCATTGTTAAAGGAGTAGAAAAAGTTATTCTTATC
CAAGAGCAGCTGTCTAAGAACAGGATCATCGTGGAGGCTGATAGAAAAGGGGCTGTTGGA
GCTTCAGTTACCAGCTCTACCCATGAGAAAAAAAGCAGAACCAATATGGCTGTGAAACAA
GGACGATTTTATTTGAGGCATAATACTTTGTCAGAAGATATACCCATTGTCATCATATTT
AAGGCCATGGGTGTTGAGAGTGACCAGGAAATTGTGCAGATGATTGGAACAGAGGAGCAC
GTGATGGCTGCATTTGGGCCCAGTCTGGAAGAGTGCCAGAAAGCTCAGATTTTCACACAG
ATGCAGGCATTAAAATATATAGGGAACAAAGTAAGAAGGCAAAGGATGTGGGGAGGTGGA
CCAAAGAAAACCAAAATAGAAGAAGCAAGAGAGCTCCTGGCTTCCACCATTCTGACCCAT
GTCCCAGTTAAGGAATTCAATTTCCGAGCCAAATGTATCTATACTGCAGTGATGGTGCGA
AGAGTTATTCTGGCCCAAGGAGATAATAAAGTTGACGACAGAGATTATTATGGTAACAAG
CGACTGGAATTGGCAGGACAGCTTTTATCTCTTCTTTTTGAAGACTTGTTCAAAAAATTT
AATTCTGAAATGAAAAAGATTGCCGACCAGGTGATTCCTAAGCAAAGAGCAGCCCAGTTT
GATGTTGTCAAACACATGCGCCAAGACCAGATCACCAATGGCATGGTGAATGCTATTTCT
ACCGGAAATTGGTCTTTAAAGAGATTTAAAATGGACCGCCAGGGTGTAACCCAAGTGCTG
TCTCGCTTGTCATATATATCCGCACTGGGCATGATGACAAGAATCTCTTCCCAGTTTGAA
AAAACGAGAAAAGTGAGTGGTCCTCGCTCCCTCCAGCCATCTCAGTGGGGAATGCTGTGT
CCTTCGGACACTCCTGAAGGAGAGGCATGTGGTTTGGTTAAAAACTTGGCCCTTATGACA
CACATCACAACTGATATGGAAGATGGACCCATTGTTAAATTAGCCAGTAACTTGGGAGTA
GAAGATGTGAATTTATTATGTGGGGAAGAGCTCTCTTACCCAAATGTGTTTCTTGTCTTT
CTTAATGGTAACATCTTAGGTGTCATTCGAGACCACAAAAAGCTAGTGAATACATTTCGA
CTCATGAGAAGAGCAGGATATATCAATGAATTTGTTTCCATCTCAACAAATCTTACAGAT
CGATGTGTCTATATTTCTTCTGATGGGGGAAGGCTATGCAGACCCTACATAATTGTCAAG
AAACAGAAGCCAGCAGTCACAAATAAACATATGGAAGAGCTGGCCCAAGGGTACAGGAAT
TTTGAAGATTTCTTACATGAGAGTCTGGTTGAATATTTAGATGTGAATGAAGAAAATGAT
TGTAACATTGCACTGTACGAACACACAATTAATAAAGACACCACCCACTTGGAGATTGAA
CCCTTCACTCTTCTCGGCGTGTGTGCTGGACTTATCCCATACCCTCACCATAACCAGTCA
CCGAGAAACACTTATCAGTGTGCCATGGGGAAACAAGCCATGGGTACTATAGGATACAAC
CAGCGAAACAGAATTGATACTCTCATGTATCTACTAGCATATCCACAAAAACCCATGGTT
AAGACAAAAACCATTGAATTGATAGAATTTGAGAAACTGCCAGCTGGACAGAATGCAACA
GTTGCTGTGATGAGCTATAGTGGCTATGATATTGAAGATGCTCTTGTTTTAAACAAGGCC
TCTTTAGACAGAGGCTTTGGGCGTTGCCTTGTATATAAAAATGCTAAATGTACGTTGAAA
CGATACACCAATCAGACTTTTGATAAAGTGATGGGGCCCATGTTGGATGCTGCTACAAGG
AAACCTATCTGGCGACATGAAATCTTAGATGCAGATGGTATTTGTTCTCCAGGTGAGAAA
GTAGAAAACAAACAAGTGCTTGTAAATAAGTCCATGCCCACAGTGACTCAGATTCCTTTG
GAAGGAAGTAATGTACCACAGCAACCACAGTACAAAGATGTACCCATAACCTACAAAGGA
GCAACAGACTCATATATTGAAAAAGTGATGATATCTTCAAATGCTGAAGATGCTTTTCTG
ATCAAAATGCTGCTGAGACAGACAAGGCGTCCAGAAATTGGAGACAAATTCAGCAGTCGT
CATGGGCAAAAAGGTGTTTGTGGCTTGATCGTCCCCCAGGAAGACATGCCATTTTGTGAT
TCTGGCATCTGTCCGGACATCATCATGAACCCACACGGCTTCCCATCACGAATGACGGTG
GGGAAGCTCATTGAGCTGCTGGCTGGCAAGGCCGGTGTGCTGGACGGCAGATTCCACTAC
GGCACTGCGTTTGGAGGCAGTAAAGTGAAGGATGTGTGTGAGGACCTCGTTCGCCATGGT
TATAACTACTTGGGGAAAGACTATGTTACATCCGGCATCACAGGTGAGCCCTTAGAAGCA
TACATCTATTTTGGCCCCGTGTACTATCAGAAGCTGAAACACATGGTGCTAGATAAAATG
CATGCCCGGGCCCGGGGCCCACGAGCCGTCCTTACCAGGCAACCCACTGAAGGACGGTCT
CGTGATGGTGGCTTGCGTCTCGGGGAAATGGAACGTGACTGTTTAATCGGTTATGGAGCC
AGTATGCTTTTGCTAGAGAGACTAATGATTTCAAGTGATGCCTTTGAGGTTGATGTCTGT
GGGCAGTGTGGACTTCTGGGGTATTCTGGCTGGTGCCATTACTGCAAGTCATCCTGCCAC
GTGTCTTCCCTCCGTATTCCGTATGCCTGCAAGCTGCTCTTCCAGGAACTACAGTCTATG
AACATCATCCCCAGGTTAAAACTGTCCAAGTACAATGAATGA
Protein Properties
Number of Residues 1133
Molecular Weight 121119.23
Theoretical pI 8.554
Pfam Domain Function
Signals Not Available
Transmembrane Regions Not Available
Protein Sequence
>DNA-directed RNA polymerase III subunit RPC2
MDVLAEEFGNLTPEQLAAPIPTVEEKWRLLPAFLKVKGLVKQHIDSFNYFINVEIKKIMK
ANEKVTSDADPMWYLKYLNIYVGLPDVEESFNVTRPVSPHECRLRDMTYSAPITVDIEYT
RGSQRIIRNALPIGRMPIMLRSSNCVLTGKTPAEFAKLNECPLDPGGYFIVKGVEKVILI
QEQLSKNRIIVEADRKGAVGASVTSSTHEKKSRTNMAVKQGRFYLRHNTLSEDIPIVIIF
KAMGVESDQEIVQMIGTEEHVMAAFGPSLEECQKAQIFTQMQALKYIGNKVRRQRMWGGG
PKKTKIEEARELLASTILTHVPVKEFNFRAKCIYTAVMVRRVILAQGDNKVDDRDYYGNK
RLELAGQLLSLLFEDLFKKFNSEMKKIADQVIPKQRAAQFDVVKHMRQDQITNGMVNAIS
TGNWSLKRFKMDRQGVTQVLSRLSYISALGMMTRISSQFEKTRKVSGPRSLQPSQWGMLC
PSDTPEGEACGLVKNLALMTHITTDMEDGPIVKLASNLGVEDVNLLCGEELSYPNVFLVF
LNGNILGVIRDHKKLVNTFRLMRRAGYINEFVSISTNLTDRCVYISSDGGRLCRPYIIVK
KQKPAVTNKHMEELAQGYRNFEDFLHESLVEYLDVNEENDCNIALYEHTINKDTTHLEIE
PFTLLGVCAGLIPYPHHNQSPRNTYQCAMGKQAMGTIGYNQRNRIDTLMYLLAYPQKPMV
KTKTIELIEFEKLPAGQNATVAVMSYSGYDIEDALVLNKASLDRGFGRCLVYKNAKCTLK
RYTNQTFDKVMGPMLDAATRKPIWRHEILDADGICSPGEKVENKQVLVNKSMPTVTQIPL
EGSNVPQQPQYKDVPITYKGATDSYIEKVMISSNAEDAFLIKMLLRQTRRPEIGDKFSSR
HGQKGVCGLIVPQEDMPFCDSGICPDIIMNPHGFPSRMTVGKLIELLAGKAGVLDGRFHY
GTAFGGSKVKDVCEDLVRHGYNYLGKDYVTSGITGEPLEAYIYFGPVYYQKLKHMVLDKM
HARARGPRAVLTRQPTEGRSRDGGLRLGEMERDCLIGYGASMLLLERLMISSDAFEVDVC
GQCGLLGYSGWCHYCKSSCHVSSLRIPYACKLLFQELQSMNIIPRLKLSKYNE
GenBank ID Protein 238908503
UniProtKB/Swiss-Prot ID Q9NW08
UniProtKB/Swiss-Prot Entry Name RPC2_HUMAN
PDB IDs Not Available
GenBank Gene ID NM_018082.5
GeneCard ID POLR3B
GenAtlas ID POLR3B
HGNC ID HGNC:30348
References
General References
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  3. Molina H, Horn DM, Tang N, Mathivanan S, Pandey A: Global proteomic profiling of phosphopeptides using electron transfer dissociation tandem mass spectrometry. Proc Natl Acad Sci U S A. 2007 Feb 13;104(7):2199-204. Epub 2007 Feb 7. [PubMed:17287340 ]
  4. Hu P, Wu S, Sun Y, Yuan CC, Kobayashi R, Myers MP, Hernandez N: Characterization of human RNA polymerase III identifies orthologues for Saccharomyces cerevisiae RNA polymerase III subunits. Mol Cell Biol. 2002 Nov;22(22):8044-55. [PubMed:12391170 ]
  5. Chiu YH, Macmillan JB, Chen ZJ: RNA polymerase III detects cytosolic DNA and induces type I interferons through the RIG-I pathway. Cell. 2009 Aug 7;138(3):576-91. doi: 10.1016/j.cell.2009.06.015. Epub 2009 Jul 23. [PubMed:19631370 ]
  6. Ablasser A, Bauernfeind F, Hartmann G, Latz E, Fitzgerald KA, Hornung V: RIG-I-dependent sensing of poly(dA:dT) through the induction of an RNA polymerase III-transcribed RNA intermediate. Nat Immunol. 2009 Oct;10(10):1065-72. doi: 10.1038/ni.1779. Epub 2009 Jul 16. [PubMed:19609254 ]