ID F0TV82_9INFA Unreviewed; 757 AA.
AC F0TV82;
DT 03-MAY-2011, integrated into UniProtKB/TrEMBL.
DT 03-MAY-2011, sequence version 1.
DT 24-JAN-2024, entry version 55.
DE RecName: Full=RNA-directed RNA polymerase catalytic subunit {ECO:0000256|HAMAP-Rule:MF_04065};
DE EC=2.7.7.48 {ECO:0000256|HAMAP-Rule:MF_04065};
DE AltName: Full=Polymerase basic protein 1 {ECO:0000256|HAMAP-Rule:MF_04065};
DE Short=PB1 {ECO:0000256|HAMAP-Rule:MF_04065};
DE AltName: Full=RNA-directed RNA polymerase subunit P1 {ECO:0000256|HAMAP-Rule:MF_04065};
GN Name=PB1 {ECO:0000256|HAMAP-Rule:MF_04065,
GN ECO:0000313|EMBL:ADY69956.1};
OS Influenza A virus (A/swine/Hong Kong/32/1977(H1N1)).
OC Viruses; Riboviria; Orthornavirae; Negarnaviricota; Polyploviricotina;
OC Insthoviricetes; Articulavirales; Orthomyxoviridae; Alphainfluenzavirus;
OC Alphainfluenzavirus influenzae; Influenza A virus.
OX NCBI_TaxID=991160 {ECO:0000313|EMBL:ADY69956.1, ECO:0000313|Proteomes:UP000138134};
RN [1] {ECO:0000313|EMBL:ADY69956.1, ECO:0000313|Proteomes:UP000138134}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=A/swine/Hong Kong/32/1977 {ECO:0000313|EMBL:ADY69956.1};
RX PubMed=21614079; DOI=10.1038/nature10004;
RA Vijaykrishna D., Smith G.J., Pybus O.G., Zhu H., Bhatt S., Poon L.L.,
RA Riley S., Bahl J., Ma S.K., Cheung C.L., Perera R.A., Chen H.,
RA Shortridge K.F., Webby R.J., Webster R.G., Guan Y., Peiris J.S.;
RT "Long-term evolution and transmission dynamics of swine influenza A
RT virus.";
RL Nature 473:519-522(2011).
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 copies vRNA into complementary RNA (cRNA) which in
CC turn serves as a template for the production of more vRNAs.
CC {ECO:0000256|HAMAP-Rule:MF_04065}.
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:0000256|ARBA:ARBA00002148}.
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:0000256|HAMAP-Rule:MF_04065,
CC ECO:0000256|RuleBase:RU004330};
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:0000256|HAMAP-
CC Rule:MF_04065}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|ARBA:ARBA00004496}. Host
CC nucleus {ECO:0000256|HAMAP-Rule:MF_04065}. Host cytoplasm
CC {ECO:0000256|HAMAP-Rule:MF_04065}. Nucleus
CC {ECO:0000256|ARBA:ARBA00004123}.
CC -!- PTM: Phosphorylated by host PRKCA. {ECO:0000256|HAMAP-Rule:MF_04065}.
CC -!- SIMILARITY: Belongs to the influenza viruses polymerase PB1 family.
CC {ECO:0000256|HAMAP-Rule:MF_04065}.
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DR EMBL; CY084543; ADY69956.1; -; Viral_cRNA.
DR Proteomes; UP000138134; Genome.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0030430; C:host cell cytoplasm; 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-dependent RNA polymerase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0006351; P:DNA-templated transcription; 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:0039694; P:viral RNA genome replication; IEA:UniProtKB-UniRule.
DR GO; GO:0019083; P:viral transcription; IEA:UniProtKB-KW.
DR Gene3D; 6.10.140.720; -; 1.
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 {ECO:0000256|ARBA:ARBA00023247, ECO:0000256|HAMAP-Rule:MF_04065};
KW Eukaryotic host transcription shutoff by virus
KW {ECO:0000256|ARBA:ARBA00022731, ECO:0000256|HAMAP-Rule:MF_04065};
KW Host cytoplasm {ECO:0000256|ARBA:ARBA00023200, ECO:0000256|HAMAP-
KW Rule:MF_04065};
KW Host gene expression shutoff by virus {ECO:0000256|ARBA:ARBA00022995,
KW ECO:0000256|HAMAP-Rule:MF_04065};
KW Host nucleus {ECO:0000256|ARBA:ARBA00022562, ECO:0000256|HAMAP-
KW Rule:MF_04065};
KW Host-virus interaction {ECO:0000256|ARBA:ARBA00022581, ECO:0000256|HAMAP-
KW Rule:MF_04065};
KW Inhibition of host RNA polymerase II by virus
KW {ECO:0000256|ARBA:ARBA00023103, ECO:0000256|HAMAP-Rule:MF_04065};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW Rule:MF_04065};
KW Nucleotidyltransferase {ECO:0000256|ARBA:ARBA00022695, ECO:0000256|HAMAP-
KW Rule:MF_04065};
KW Phosphoprotein {ECO:0000256|ARBA:ARBA00022553, ECO:0000256|HAMAP-
KW Rule:MF_04065};
KW RNA-directed RNA polymerase {ECO:0000256|ARBA:ARBA00022484,
KW ECO:0000256|HAMAP-Rule:MF_04065};
KW Transferase {ECO:0000256|HAMAP-Rule:MF_04065};
KW Viral RNA replication {ECO:0000256|ARBA:ARBA00022953, ECO:0000256|HAMAP-
KW Rule:MF_04065};
KW Viral transcription {ECO:0000256|ARBA:ARBA00023314, ECO:0000256|HAMAP-
KW Rule:MF_04065}.
FT DOMAIN 286..483
FT /note="RdRp catalytic"
FT /evidence="ECO:0000259|PROSITE:PS50525"
FT REGION 59..78
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 249..256
FT /note="Promoter-binding site"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_04065"
FT MOTIF 187..195
FT /note="Nuclear localization signal"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_04065"
FT MOTIF 203..216
FT /note="Nuclear localization signal"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_04065"
SQ SEQUENCE 757 AA; 86380 MW; FCDE89A1AD0BC12C CRC64;
MDVNPTLLFL EVPAQNAIST TFPYTGDPPY SHGTGTGYTM DTVNRTHQYS ERGKWTINTE
TGAPQLNPID GPLPEDNEPT GYAQTDCVLE AMAFLEKSHP GIFENSCLET MEVVQQTRVD
KLTQGRQTFD WTLNRNQPAA TALANTIEVF RLNGLTASES GRLIDFLKDV MESMDKEEME
IVTHFQRKRR VRDNMTKKMV TQRTIGKKKQ KLNKRSYLIR ALTLNTMTKD AERGKLKRRA
IATPGMQIRG FVYFVETLAR SICEKLEQSG LPVGGNEKKA KLANVVRKMM TNSQDTELSF
TITGDNTKWN ENQNPRMFLA MITYITRNQP EWFRNVLSVA PIMFSNKMAR LGKGYMFESK
NMKLRTQIPA EMLSGIDLRY FNDSTRKKIE KIRPLLIEGA ASLSPGMMMG MFNMLSTVLG
VSILNLGQKE YTKTTYWWDG LQSSDDFALI VNASNHEGIQ AGVDRFYRTC KLLGINMSKK
KSYINRTGTF EFTSFFYRYG FVANFSMELP SFGVSGINES ADMSIGVTVI KNNMINNDLG
PATAQMALQL FIKDYRYTYR CHRGDTQIQT RRSFEIKKLW DQTRSKAGLL VSDGGPNLYN
IRNLHIPEVC LKWELMDKDY QGRLCNPLNP FVSHKEIESV NNAVVMPSHG PAKTMEYDAV
ATTHSWVPKR NRSILNTSQR GILEDEQMYQ KCCNLFEKFF PSSSYRRPVG ISSMVEAMVS
RARIDARIDF ESGRIKKEDF AEIMKICSTI EDLRRQK
//
