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    POLR2I RNA polymerase II subunit I [ Homo sapiens (human) ]

    Gene ID: 5438, updated on 8-Jul-2021


    Official Symbol
    POLR2Iprovided by HGNC
    Official Full Name
    RNA polymerase II subunit Iprovided by HGNC
    Primary source
    See related
    Ensembl:ENSG00000105258 MIM:180662
    Gene type
    protein coding
    RefSeq status
    Homo sapiens
    Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
    Also known as
    RPB9; hRPB14.5
    This gene encodes a subunit of RNA polymerase II, the polymerase responsible for synthesizing messenger RNA in eukaryotes. This subunit, in combination with two other polymerase subunits, forms the DNA binding domain of the polymerase, a groove in which the DNA template is transcribed into RNA. The product of this gene has two zinc finger motifs with conserved cysteines and the subunit does possess zinc binding activity. [provided by RefSeq, Jul 2008]
    Ubiquitous expression in testis (RPKM 23.3), brain (RPKM 15.2) and 25 other tissues See more
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    Genomic context

    See POLR2I in Genome Data Viewer
    Exon count:
    Annotation release Status Assembly Chr Location
    109.20210514 current GRCh38.p13 (GCF_000001405.39) 19 NC_000019.10 (36113709..36114875, complement)
    105.20201022 previous assembly GRCh37.p13 (GCF_000001405.25) 19 NC_000019.9 (36604611..36605777, complement)

    Chromosome 19 - NC_000019.10Genomic Context describing neighboring genes Neighboring gene uncharacterized LOC101927572 Neighboring gene THAP domain containing 8 Neighboring gene RNY5 pseudogene 10 Neighboring gene WD repeat domain 62 Neighboring gene ovo like zinc finger 3 Neighboring gene uncharacterized LOC105372385 Neighboring gene tubulin folding cofactor B

    Genomic regions, transcripts, and products


    • Project title: HPA RNA-seq normal tissues
    • Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
    • BioProject: PRJEB4337
    • Publication: PMID 24309898
    • Analysis date: Wed Apr 4 07:08:55 2018

    HIV-1 interactions

    Replication interactions

    Interaction Pubs
    Knockdown of polymerase (RNA) II (DNA directed) polypeptide I (POLR2I, 14.5kDa) by siRNA inhibits the early stages of HIV-1 replication in 293T cells infected with VSV-G pseudotyped HIV-1 PubMed

    Protein interactions

    Protein Gene Interaction Pubs
    Envelope surface glycoprotein gp120 env The transcription factors and kinases c-Jun, JNK, MEK, p38 MAPK, STAT-3, JAK-1, TFII D, TFII F, eIF-4E, and RNA polymerase II are induced by HIV-1 gp120 PubMed
    Tat tat The interaction of Tip110 with HIV-1 Tat leads to a higher efficiency of elongation for RNAPII complexes formed on the LTR promoter PubMed
    tat Expression of both Tip110 and Tat enhances phosphorylation of RNAPII at both serine 2 and serine 5, which account for Tip110 function in transcription activation PubMed
    tat The interaction of Tip110 with HIV-1 Tat and the RNAPII C-terminal domain leads to the recruitment of increased CDK9/CycT1 to the transcription complex PubMed
    tat HIV-1 Tat complexes with RNA polymerase II and cellular transcription factors as part of the HIV-1 transcription preinitiation and elongation complexes and stimulates RNA polymerase II processivity by inducing the phosphorylation of its C-terminal Domain PubMed
    tat A small molecule compound C3 inhibits HIV-1 replication by suppressing HIV-1 Tat-mediated HIV-1 LTR-driven gene expression and phosphorylation of RNAPII through inhibition of Tat binding to CycT1 PubMed
    tat JQ1, a small molecule inhibitor of Brd4, directly dissociates Brd4 from HIV-1 promoter and promotes subsequently HIV-1 Tat binding to HIV-1 promoter, resulting in increased phosphorylation of RNA polymerase II and viral transcription PubMed
    tat HIV-1 Tat 41/44 peptide TAALS from the core domain of Tat inhibits Tat-mediated HIV-1 gene expression and replication by binding the Cdk2/Cyclin E complex and inhibiting the phosphorylation of serine 5 of RNAPII PubMed
    Vpr vpr HIV-1 Vpr interacts with basal transcription complexes such as P-TEFb, TFIIH, TFIID (TBP) and TFIIB which activate RNA polymerase II gene transcription PubMed

    Go to the HIV-1, Human Interaction Database

    Pathways from PubChem


    Products Interactant Other Gene Complex Source Pubs Description

    General gene information



    Gene Ontology Provided by GOA

    Function Evidence Code Pubs
    contributes_to DNA-directed 5'-3' RNA polymerase activity IBA
    Inferred from Biological aspect of Ancestor
    more info
    enables nucleic acid binding IEA
    Inferred from Electronic Annotation
    more info
    enables protein binding IPI
    Inferred from Physical Interaction
    more info
    enables zinc ion binding IEA
    Inferred from Electronic Annotation
    more info
    Component Evidence Code Pubs
    part_of RNA polymerase II, core complex IBA
    Inferred from Biological aspect of Ancestor
    more info
    part_of RNA polymerase II, core complex IDA
    Inferred from Direct Assay
    more info
    located_in nucleolus IEA
    Inferred from Electronic Annotation
    more info
    located_in nucleoplasm IDA
    Inferred from Direct Assay
    more info
    located_in nucleoplasm TAS
    Traceable Author Statement
    more info
    located_in nucleus IDA
    Inferred from Direct Assay
    more info

    General protein information

    Preferred Names
    DNA-directed RNA polymerase II subunit RPB9
    DNA-directed RNA polymerase II 14.5 kDa polypeptide
    DNA-directed RNA polymerase II subunit I
    RNA polymerase II 14.5 kDa subunit
    RNA polymerase II subunit B9
    polymerase (RNA) II (DNA directed) polypeptide I, 14.5kDa
    polymerase (RNA) II subunit I

    NCBI Reference Sequences (RefSeq)

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    RefSeqs maintained independently of Annotated Genomes

    These reference sequences exist independently of genome builds. Explain

    These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

    mRNA and Protein(s)

    1. NM_006233.5NP_006224.1  DNA-directed RNA polymerase II subunit RPB9

      See identical proteins and their annotated locations for NP_006224.1

      Status: REVIEWED

      Source sequence(s)
      Consensus CDS
      ENSP00000221859.3, ENST00000221859.9
      Conserved Domains (2) summary
      RPB9; DNA-directed RNA polymerase, subunit M/Transcription elongation factor TFIIS [Transcription]
      Zn-ribbon_RPB9; C-terminal zinc ribbon domain of RPB9 subunit of RNA polymerase II

    RefSeqs of Annotated Genomes: Homo sapiens Updated Annotation Release 109.20210514

    The following sections contain reference sequences that belong to a specific genome build. Explain

    Reference GRCh38.p13 Primary Assembly


    1. NC_000019.10 Reference GRCh38.p13 Primary Assembly

      36113709..36114875 complement
      GenBank, FASTA, Sequence Viewer (Graphics)
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