RDRP_I96A2
ID RDRP_I96A2 Reviewed; 757 AA.
AC A3DRP8;
DT 05-MAY-2009, integrated into UniProtKB/Swiss-Prot.
DT 20-MAR-2007, sequence version 1.
DT 23-FEB-2022, entry version 49.
DE RecName: Full=RNA-directed RNA polymerase catalytic subunit {ECO:0000255|HAMAP-Rule:MF_04065};
DE EC=2.7.7.48 {ECO:0000255|HAMAP-Rule:MF_04065};
DE AltName: Full=Polymerase basic protein 1 {ECO:0000255|HAMAP-Rule:MF_04065};
DE Short=PB1 {ECO:0000255|HAMAP-Rule:MF_04065};
DE AltName: Full=RNA-directed RNA polymerase subunit P1 {ECO:0000255|HAMAP-Rule:MF_04065};
GN Name=PB1 {ECO:0000255|HAMAP-Rule:MF_04065};
OS Influenza A virus (strain A/USA:Memphis/10/1996 H1N1).
OC Viruses; Riboviria; Orthornavirae; Negarnaviricota; Polyploviricotina;
OC Insthoviricetes; Articulavirales; Orthomyxoviridae; Alphainfluenzavirus.
OX NCBI_TaxID=416730;
OH NCBI_TaxID=8782; Aves.
OH NCBI_TaxID=9606; Homo sapiens (Human).
OH NCBI_TaxID=9823; Sus scrofa (Pig).
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC RNA].
RA Ghedin E., Spiro D., Miller N., Zaborsky J., Feldblyum T., Subbu V.,
RA Shumway M., Sparenborg J., Groveman L., Halpin R., Sitz J., Koo H.,
RA Salzberg S.L., Webster R.G., Hoffmann E., Krauss S., Naeve C., Bao Y.,
RA Bolotov P., Dernovoy D., Kiryutin B., Lipman D.J., Tatusova T.;
RT "The NIAID influenza genome sequencing project.";
RL Submitted (FEB-2007) to the EMBL/GenBank/DDBJ databases.
RN [2]
RP NUCLEOTIDE SEQUENCE [GENOMIC RNA].
RG The NIAID Influenza Genome Sequencing Consortium;
RL Submitted (FEB-2007) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: RNA-dependent RNA polymerase which is responsible for
CC replication and transcription of virus RNA segments. The transcription
CC of viral mRNAs occurs by a unique mechanism called cap-snatching. 5'
CC methylated caps of cellular mRNAs are cleaved after 10-13 nucleotides
CC by PA. In turn, these short capped RNAs are used as primers by PB1 for
CC transcription of viral mRNAs. During virus replication, PB1 initiates
CC RNA synthesis and copy vRNA into complementary RNA (cRNA) which in turn
CC serves as a template for the production of more vRNAs.
CC {ECO:0000255|HAMAP-Rule:MF_04065}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a ribonucleoside 5'-triphosphate + RNA(n) = diphosphate +
CC RNA(n+1); Xref=Rhea:RHEA:21248, Rhea:RHEA-COMP:14527, Rhea:RHEA-
CC COMP:17342, ChEBI:CHEBI:33019, ChEBI:CHEBI:61557, ChEBI:CHEBI:140395;
CC EC=2.7.7.48; Evidence={ECO:0000255|HAMAP-Rule:MF_04065};
CC -!- SUBUNIT: Influenza RNA polymerase is composed of three subunits: PB1,
CC PB2 and PA. Interacts (via N-terminus) with PA (via C-terminus).
CC Interacts (via C-terminus) with PB2 (via N-terminus); this interaction
CC is essential for transcription initiation. {ECO:0000255|HAMAP-
CC Rule:MF_04065}.
CC -!- SUBCELLULAR LOCATION: Host nucleus {ECO:0000255|HAMAP-Rule:MF_04065}.
CC Host cytoplasm {ECO:0000255|HAMAP-Rule:MF_04065}.
CC -!- PTM: Phosphorylated by host PRKCA. {ECO:0000255|HAMAP-Rule:MF_04065}.
CC -!- SIMILARITY: Belongs to the influenza viruses polymerase PB1 family.
CC {ECO:0000255|HAMAP-Rule:MF_04065}.
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DR EMBL; CY019801; ABN50970.1; -; Viral_cRNA.
DR SMR; A3DRP8; -.
DR Proteomes; UP000007557; Genome.
DR GO; GO:0030430; C:host cell cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0042025; C:host cell nucleus; IEA:UniProtKB-SubCell.
DR GO; GO:0000166; F:nucleotide binding; IEA:UniProtKB-UniRule.
DR GO; GO:0003723; F:RNA binding; IEA:InterPro.
DR GO; GO:0003968; F:RNA-directed 5'-3' RNA polymerase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0039523; P:suppression by virus of host mRNA transcription via inhibition of RNA polymerase II activity; IEA:UniProtKB-UniRule.
DR GO; GO:0006351; P:transcription, DNA-templated; IEA:UniProtKB-UniRule.
DR GO; GO:0039694; P:viral RNA genome replication; IEA:UniProtKB-UniRule.
DR GO; GO:0019083; P:viral transcription; IEA:UniProtKB-KW.
DR HAMAP; MF_04065; INFV_RDRP; 1.
DR InterPro; IPR007099; RNA-dir_pol_NSvirus.
DR InterPro; IPR001407; RNA_pol_PB1_influenza.
DR Pfam; PF00602; Flu_PB1; 1.
DR PIRSF; PIRSF000827; RdRPol_OMV; 1.
DR PROSITE; PS50525; RDRP_SSRNA_NEG_SEG; 1.
PE 3: Inferred from homology;
KW Eukaryotic host gene expression shutoff by virus;
KW Eukaryotic host transcription shutoff by virus; Host cytoplasm;
KW Host gene expression shutoff by virus; Host nucleus;
KW Host-virus interaction; Inhibition of host RNA polymerase II by virus;
KW Nucleotide-binding; Nucleotidyltransferase; Phosphoprotein;
KW RNA-directed RNA polymerase; Transferase; Viral RNA replication;
KW Viral transcription.
FT CHAIN 1..757
FT /note="RNA-directed RNA polymerase catalytic subunit"
FT /id="PRO_0000373058"
FT DOMAIN 286..483
FT /note="RdRp catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04065"
FT REGION 53..82
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 249..256
FT /note="Promoter-binding site"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04065"
FT MOTIF 187..195
FT /note="Nuclear localization signal"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04065"
FT MOTIF 203..216
FT /note="Nuclear localization signal"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04065"
SQ SEQUENCE 757 AA; 86540 MW; 44D38265C5D939C6 CRC64;
MDVNPTLLFL KVPAQNAIST TFPYTGDPPY SHGTGTGYTM DTVNRTHQYS ERGRWTKNTE
TGAPQLNPID GPLPKDNEPS GYAQTDCVLE AMAFLEESHP GIFENSCIET MEVVQQTRVD
KLTQGRQTYD WTLNRNQPAA TALANTIEVF RSNDLIANES GRLIDFLKDV MESMDREEVE
ITTHFQRKRR VRDNVTKKMV TQRTIGKKKH KLDKRSYLIR ALTLNTMTKD AERGKLKRRA
IATPGMQIRG FVYFVETLAR SICEKLEQSG LPVGGNEKKA KLANVVRKMM TNSQDTEISF
TITGDNTKWN ENQNPRMFLA MITYITRNQP EWFRNILSIA PIMFSNKMAR LGKGYMFESK
SMKLRTQIPA EMLANIDLKY FNDSTKKKIE KIRPLLIDGT ASLSPGMMMG MFNMLSTVLG
VSILNLGQKR YTKTTYWWDG LQSSDDFALI VNAPNYAGIQ AGVDRFYRTC KLLGINMSKK
KSYINRTGTF EFTSFFYRYG FVANFSMELP SFGVSGVNES ADMSIGVTVI KNNMINNDLG
PATAQMALQL FIKDYRYTYR CHRGDTQIQT RRSFEIKKLW DQTRSKAGLL VSDGGPNLYN
IRNLHIPEVC LKWELMDEDY QGRLCNPLNP FVSHKEIESV NNAVMMPAHG PAKNMEYDAV
ATTHSWVPKR NRSILNTSQR GILEDEQMYQ RCCNLFEKFF PSSSYRRPVG ISSMVEAMVS
RARIDARIDF ESGRIKKEEF SEIMKTCSTI EDLRRQK
