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POLR3A
HPA
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  • POLR3A
PROTEIN SUMMARY GENE INFORMATION RNA DATA ANTIBODY DATA
GENERAL INFORMATIONi

General description of the gene and the encoded protein(s) using information from HGNC and Ensembl, as well as predictions made by the Human Protein Atlas project.

Gene namei

Official gene symbol, which is typically a short form of the gene name, according to HGNC.

POLR3A
Synonyms C160, hRPC155, RPC1, RPC155
Gene descriptioni

Full gene name according to HGNC.

RNA polymerase III subunit A
Protein classi

Assigned HPA protein class(es) for the encoded protein(s).

Disease related genes
Enzymes
Human disease related genes
Metabolic proteins
Plasma proteins
Potential drug targets
RNA polymerase related proteins
Predicted locationi

All transcripts of all genes have been analyzed regarding the location(s) of corresponding protein based on prediction methods for signal peptides and transmembrane regions.

  • Genes with at least one transcript predicted to encode a secreted protein, according to prediction methods or to UniProt location data, have been further annotated and classified with the aim to determine if the corresponding protein(s) are secreted or actually retained in intracellular locations or membrane-attached.

  • Remaining genes, with no transcript predicted to encode a secreted protein, will be assigned the prediction-based location(s).

The annotated location overrules the predicted location, so that a gene encoding a predicted secreted protein that has been annotated as intracellular will have intracellular as the final location.

Intracellular
Protein evidence Evidence at protein level (all genes)
GENE INFORMATIONi

Gene information from Ensembl and Entrez, as well as links to available gene identifiers are displayed here. Information was retrieved from Ensembl if not indicated otherwise.

Chromosome 10
Cytoband q22.3
Chromosome location (bp) 77953148 - 78029522
Number of transcriptsi

Number of protein-coding transcripts from the gene as defined by Ensembl.

2
Ensembl ENSG00000148606 (version 109)
Entrez gene 11128
HGNC HGNC:30074
UniProt O14802 (UniProt - Evidence at protein level)
neXtProt NX_O14802
GeneCards POLR3A
Antibodypedia POLR3A antibodies


PROTEIN FUNCTION
Protein function (UniProt)i

Useful information about the protein provided by UniProt.

Catalytic core component of RNA polymerase III (Pol III), a DNA-dependent RNA polymerase which synthesizes small non-coding RNAs using the four ribonucleoside triphosphates as substrates. Synthesizes 5S rRNA, snRNAs, tRNAs and miRNAs from at least 500 distinct genomic loci 1, 2, 3, 4, 5, 6, 7, 8, 9. Pol III-mediated transcription cycle proceeds through transcription initiation, transcription elongation and transcription termination stages. During transcription initiation, Pol III is recruited to DNA promoters type I, II or III with the help of general transcription factors and other specific initiation factors. Once the polymerase has escaped from the promoter it enters the elongation phase during which RNA is actively polymerized, based on complementarity with the template DNA strand. Transcription termination involves the release of the RNA transcript and polymerase from the DNA 10, 11, 12, 13, 14, 15. Forms Pol III active center together with the second largest subunit POLR3B/RPC2. Appends one nucleotide at a time to the 3' end of the nascent RNA, with POLR3A/RPC1 contributing a Mg(2+)-coordinating DxDGD motif, and POLR3B/RPC2 participating in the coordination of a second Mg(2+) ion and providing lysine residues believed to facilitate Watson-Crick base pairing between the incoming nucleotide and template base. Typically, Mg(2+) ions direct a 5' nucleoside triphosphate to form a phosphodiester bond with the 3' hydroxyl of the preceding nucleotide of the nascent RNA, with the elimination of pyrophosphate 16, 17, 18, 19, 20, 21, 22. Pol III plays a key role in sensing and limiting infection by intracellular bacteria and DNA viruses. Acts as a 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.... show less
Molecular function (UniProt)i

Keywords assigned by UniProt to proteins due to their particular molecular function.

Nucleotidyltransferase, Transferase
Biological process (UniProt)i

Keywords assigned by UniProt to proteins because they are involved in a particular biological process.

Antiviral defense, Immunity, Innate immunity, Transcription
Ligand (UniProt)i

Keywords assigned by UniProt to proteins because they bind, are associated with, or whose activity is dependent of some molecule.

Magnesium, Metal-binding, Zinc
Gene summary (Entrez)i

Useful information about the gene from Entrez

The protein encoded by this gene is the catalytic component of RNA polymerase III, which synthesizes small RNAs. The encoded protein also acts as a sensor to detect foreign DNA and trigger an innate immune response. [provided by RefSeq, Aug 2011]... show less
PROTEIN INFORMATIONi

The protein information section displays alternative protein-coding transcripts (splice variants) encoded by this gene according to the Ensembl database.

The Splice variant identifier links to the Ensembl website protein summary for the selected splice variant. The data in the Swissprot and TrEMBL columns links to corresponding pages in the UniProt database.

The protein classes assigned to this protein are shown if expanding the data in the protein class column. Parent protein classes are in bold font and subclasses are listed under the parent class.

The length of the protein (amino acid residues according to Ensembl), molecular mass (kDalton), predicted signal peptide and number of predicted transmembrane region(s) according to in-house majority decision methods based on sets of predictors are also reported.
Splice variant SwissProt TrEMBL Protein class Gene ontology Length & mass Signal peptide
(predicted)
Transmembrane regions
(predicted)
POLR3A-201
ENSP00000361446
ENST00000372371
O14802
[Direct mapping] DNA-directed RNA polymerase III subunit RPC1
Show all
Enzymes
   ENZYME proteins
   Transferases
Metabolic proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Plasma proteins
RNA polymerase related proteins
Disease related genes
Potential drug targets
Human disease related genes
   Congenital disorders of metabolism
   Congenital disorders of lipid/glycolipid metabolism
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0000428 [DNA-directed RNA polymerase complex]
GO:0002376 [immune system process]
GO:0003677 [DNA binding]
GO:0003682 [chromatin binding]
GO:0003899 [DNA-directed 5'-3' RNA polymerase activity]
GO:0005515 [protein binding]
GO:0005634 [nucleus]
GO:0005654 [nucleoplasm]
GO:0005666 [RNA polymerase III complex]
GO:0005829 [cytosol]
GO:0006351 [DNA-templated transcription]
GO:0016020 [membrane]
GO:0016740 [transferase activity]
GO:0016779 [nucleotidyltransferase activity]
GO:0031981 [nuclear lumen]
GO:0032728 [positive regulation of interferon-beta production]
GO:0034062 [5'-3' RNA polymerase activity]
GO:0045087 [innate immune response]
GO:0046872 [metal ion binding]
GO:0051607 [defense response to virus]
Show all
1390 aa
155.6 kDa
No 0
POLR3A-212
ENSP00000513898
ENST00000698731
Metabolic proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
RNA polymerase related proteins
Human disease related genes
   Congenital disorders of metabolism
   Congenital disorders of lipid/glycolipid metabolism
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0003677 [DNA binding]
GO:0003899 [DNA-directed 5'-3' RNA polymerase activity]
GO:0006351 [DNA-templated transcription]
Show all
1343 aa
150.3 kDa
No 0

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