Q9IP63 · Q9IP63_9INFA

Function

function

Plays an essential role in transcription initiation and cap-stealing mechanism, in which cellular capped pre-mRNAs are used to generate primers for viral transcription. Recognizes and binds the 7-methylguanosine-containing cap of the target pre-RNA which is subsequently cleaved after 10-13 nucleotides by the viral protein PA. Plays a role in the initiation of the viral genome replication and modulates the activity of the ribonucleoprotein (RNP) complex. In addition, participates in the inhibition of type I interferon induction through interaction with and inhibition of the host mitochondrial antiviral signaling protein MAVS.

Caution

Lacks conserved residue(s) required for the propagation of feature annotation.

Features

Showing features for site.

1759100200300400500600700
TypeIDPosition(s)Description
Site627Mammalian adaptation

GO annotations

all annotationsall molecular functionvirus receptor activitydna bindingrna bindingcytoskeletal motor activitycatalytic activitygtpase activitystructural molecule activitytransporter activitycytoskeletal protein bindinglipid bindingcyclase activityantioxidant activityoxidoreductase activitytransferase activityhydrolase activitylyase activityisomerase activityligase activityprotein tag activitycargo receptor activityhistone bindingprotein folding chaperonetranslation regulator activitynutrient reservoir activityreceptor ligand activitymolecular transducer activitymolecular adaptor activitytoxin activitycell adhesion mediator activitymolecular function regulator activityvirus coreceptor activitycatalytic activity, acting on a proteincatalytic activity, acting on dnacatalytic activity, acting on rnamolecular carrier activitytranscription regulator activitygeneral transcription initiation factor activitymolecular sensor activitymolecular sequestering activityatp-dependent activityother molecular functionall biological processmitotic cell cyclecytokinesiscytoplasmic translationimmune system processmuscle system processcirculatory system processrenal system processrespiratory system processcarbohydrate metabolic processgeneration of precursor metabolites and energydna replicationdna repairdna recombinationchromatin organizationdna-templated transcriptionregulation of dna-templated transcriptiontrna metabolic processprotein foldingprotein glycosylationamino acid metabolic processmodified amino acid metabolic processlipid metabolic processvitamin metabolic processsulfur compound metabolic processintracellular protein transportnucleocytoplasmic transportautophagyinflammatory responsemitochondrion organizationcytoskeleton organizationmicrotubule-based movementperoxisome organizationlysosome organizationchromosome segregationcell adhesionestablishment or maintenance of cell polarityprogrammed cell deathphotosynthesismrna metabolic processsnrna metabolic processvesicle-mediated transportreproductive processdigestive system processsignalingcell differentiationprotein catabolic processextracellular matrix organizationregulatory ncrna-mediated gene silencingtelomere organizationcell junction organizationwound healingribosome biogenesiscilium organizationanatomical structure developmentcell motilitynervous system processendocrine processprotein maturationtransmembrane transportnucleobase-containing small molecule metabolic processhepaticobiliary system processmembrane organizationprotein-containing complex assemblycell wall organization or biogenesisnitrogen cycle metabolic processprotein localization to plasma membranedefense response to other organismdetoxificationmeiotic nuclear divisionmitotic nuclear divisionmitochondrial gene expressioncarbohydrate derivative metabolic processother biological processall cellular componentnuclear chromosomeextracellular regionextracellular spacecell wallnucleusnuclear envelopenucleoplasmchromosomenucleolusmitochondrionlysosomeendosomevacuoleperoxisomeendoplasmic reticulumgolgi apparatuslipid dropletmicrotubule organizing centercytosolribosomecytoskeletonplasma membraneciliumplastidthylakoidexternal encapsulating structureextracellular matrixcytoplasmic vesicleorganelleother cellular component
Cell color indicative of number of GO terms
AspectTerm
Cellular Componenthost cell mitochondrion
Cellular Componenthost cell nucleus
Cellular Componentvirion component
Molecular FunctionRNA binding
Molecular FunctionRNA-dependent RNA polymerase activity
Biological Process7-methylguanosine mRNA capping
Biological Processcap snatching
Biological ProcessDNA-templated transcription
Biological Processsymbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity
Biological Processsymbiont-mediated suppression of host mRNA transcription via inhibition of RNA polymerase II activity
Biological Processviral RNA genome replication
Biological Processvirus-mediated perturbation of host defense response

Keywords

Names & Taxonomy

Protein names

  • Recommended name
    Polymerase basic protein 2
  • Alternative names
    • RNA-directed RNA polymerase subunit P3

Gene names

    • Name
      pb2
    • Synonyms
      PB2

Organism names

  • Taxonomic identifier
  • Strain
    • A/Hong Kong/485/97
  • Taxonomic lineage
    Viruses > Riboviria > Orthornavirae > Negarnaviricota > Polyploviricotina > Insthoviricetes > Articulavirales > Orthomyxoviridae > Alphainfluenzavirus > Alphainfluenzavirus influenzae > Influenza A virus

Accessions

  • Primary accession
    Q9IP63

Subcellular Location

Keywords

Interaction

Subunit

Influenza RNA polymerase is composed of three subunits: PB1, PB2 and PA. Interacts (via N-terminus) with PB1 (via C-terminus). Interacts with nucleoprotein NP (via N-terminus). Interacts (via N-terminus) with host MAVS (via N-terminus); this interaction inhibits host innate immune response.

Family & Domains

Features

Showing features for domain, motif.

TypeIDPosition(s)Description
Domain1-36Influenza RNA polymerase PB2 N-terminal region
Domain37-104Influenza RNA polymerase PB2 second
Domain107-248Influenza RNA polymerase PB2 middle
Domain250-319Polymerase basic protein 2 helical
Domain320-530Influenza RNA polymerase PB2 CAP binding
Domain531-680Influenza RNA polymerase PB2 sixth
Domain683-757Influenza RNA polymerase PB2 C-terminal
Motif736-739Nuclear localization signal

Sequence similarities

Belongs to the influenza viruses PB2 family.

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    759
  • Mass (Da)
    86,122
  • Last updated
    2000-10-01 v1
  • Checksum
    2F995598C9F162AB
MERIKELRDLMSQSRTREILTKTTVDHMAIIKKYTSGRQEKNPALRMKWMMAMKYPITADKRIMEMIPERKEQGQTLWSKTNDAGSDRVMVSPLAVTWWNRNGPTTSTVHYPKVYKTYFEKVERLKHGTFGPVHFRNQVKIRRRVDMNPGHADLSAKEAQDVIMEVVFPNEVGARILTSESQLTITKEKREELKNCNIAPLMVAYMLERELVRKTRFLPVAGGTSSVYIEVLHLTQGTCWEQMYTPGGEVRNDDVDQSLIIAARNIVRRATVSADPLVSLLEMCHSTQIGGVRMVDILKQNPTEEQAVDICKAAMGLKISSSFSFGGFTFKRTKGFSVKREEEVLTGNLQTLKIKVHEGYEEFTMVGRRATAILRKATRRMIQLIVSGRDEQSIAEAIIVAMVFSQEDCMIKAVRGDLNFVNRANQRLNPMHQLLRHFQKDAKVLFQNWGIEPIDNVMGMIGILPDMTPSTEMSLRGVRVSKMGVDEYSSTERVVVSIDRFLRVRDQRGNVLLSPEEVSETQGMEKLTITYSSSMMWEINGPESVLVNTYQWIIRNWETVKIQWSQEPTMLYNKMEFEPFQSLVPKAARSQYSGFVRTLFQQMRDVLGTFDTVQIIKLLPFAAAPPKQSRMQFSSLTVNVRGSGMRILVRGNSPAFNYNKTTKRLTILGKDAGALTEDPDEGTAGVESAVLRGFLILGKEDKRYGPALSINELSNLTKGEKANVLIGQGDVVLVMKRKRDSSILTDSQTATKRIRMAIN

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
AF084263
EMBL· GenBank· DDBJ
AAF74313.1
EMBL· GenBank· DDBJ
Genomic RNA

Similar Proteins

Disclaimer

Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. Our staff consists of biologists and biochemists that are not trained to give medical advice.
We'd like to inform you that we have updated our Privacy Notice to comply with Europe’s new General Data Protection Regulation (GDPR) that applies since 25 May 2018.
FeedbackHelp