ID F4MDC8_9INFA Unreviewed; 757 AA.
AC F4MDC8;
DT 28-JUN-2011, integrated into UniProtKB/TrEMBL.
DT 28-JUN-2011, sequence version 1.
DT 24-JAN-2024, entry version 56.
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:AEB39695.1};
OS Influenza A virus (A/rufous-necked stint/Japan/6KS0279/2006(mixed)).
OC Viruses; Riboviria; Orthornavirae; Negarnaviricota; Polyploviricotina;
OC Insthoviricetes; Articulavirales; Orthomyxoviridae; Alphainfluenzavirus;
OC Alphainfluenzavirus influenzae; Influenza A virus.
OX NCBI_TaxID=742302 {ECO:0000313|EMBL:AEB39695.1, ECO:0000313|Proteomes:UP000134041};
RN [1] {ECO:0000313|EMBL:AEB39695.1, ECO:0000313|Proteomes:UP000134041}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=A/rufous-necked stint/Japan/6KS0279/2006
RC {ECO:0000313|EMBL:AEB39695.1};
RX PubMed=22192630; DOI=10.1016/j.virol.2011.11.019;
RA Bui V.N., Ogawa H., Xininigen, Karibe K., Matsuo K., Awad S.S.,
RA Minoungou G.L., Yoden S., Haneda H., Ngo L.H., Tamaki S., Yamamoto Y.,
RA Nakamura K., Saito K., Watanabe Y., Runstadler J., Huettman F., Happ G.M.,
RA Imai K.;
RT "H4N8 subtype avian influenza virus isolated from shorebirds contains a
RT unique PB1 gene and causes severe respiratory disease in mice.";
RL Virology 0:0-0(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; CY089491; AEB39695.1; -; Viral_cRNA.
DR Proteomes; UP000134041; Genome.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
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-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 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; 86638 MW; 66001F07A5AC2528 CRC64;
MDVNPTLLFL KVPAQNAIST TFPYTGDPPY SHGTGTGYTM DTVNRTHQYS EKGKWTTNTE
TYAPQLNPID GPLPEDNEPS GYAQTDCVLE AMAFLEESHP GIFENSCLET MEVVQQTRVD
KLTQGRQTYD WTLNRNQPAA TALANTIEVF RLNGLTANES GRLIDFLKDV MESMDKEEME
ITTHFQRKRR IRDNMTKKMI TQRTIGKKKQ RLNKRSYLIR ALTLNTMTKD AERGKLGRRA
IATPGMQIRG FVYFVETLAR SICEKLEQSG LPVGGNEKKA KLANVVRKMM TNSQDTELSF
TITGDNTKWN ENQNPRMFLA MITYITRNQP EWFRNVLSIA PIMFSNKMAR LGKGYMFESK
SMRLRTQISA EMLASIDLKY FNESTRKKIE KIRPLLIDGT ASLSPGMMMG MFNMLSTVLG
VSILNLGQKR YTKTTYWWDG LQSSDDFALI VNAPDHEGIQ AGVDRFYRTC KLVGINMSKK
KSYINRTGTF EFTSFFYRYG FVANFSMELP SFGVSGINES ADMSIGVTVI KNNMINNDLG
PATAQMALQL FIKDYRYTYR CHRGDTQIQT RRSFELKKLW DQTRSKAGLL ISDGGPNLYN
IRNLHIPEVC LKWELMDEDY QGRLCNPLNP FVSHKEIESV NNAVVMPAHG PAKSMEYDAV
ATTHSWIPKR NRSILNTSQR GILEDEQMYQ RCCNLFEKFF PSSSYRRPVG ISSMVEAMVS
RARIDARIDF ESGRINKEEF AEIMKICYTI EELRRRN
//
