ID A4PIH0_9INFA Unreviewed; 183 AA.
AC A4PIH0;
DT 15-MAY-2007, integrated into UniProtKB/TrEMBL.
DT 15-MAY-2007, sequence version 1.
DT 27-MAR-2024, entry version 53.
DE RecName: Full=RNA-directed RNA polymerase catalytic subunit {ECO:0000256|ARBA:ARBA00020035};
DE EC=2.7.7.48 {ECO:0000256|ARBA:ARBA00012494};
DE Flags: Fragment;
GN Name=PB1 {ECO:0000313|EMBL:BAF50708.1};
OS Influenza A virus (A/duck/Hokkaido/193/2004(H5N3)).
OC Viruses; Riboviria; Orthornavirae; Negarnaviricota; Polyploviricotina;
OC Insthoviricetes; Articulavirales; Orthomyxoviridae; Alphainfluenzavirus;
OC Alphainfluenzavirus influenzae; Influenza A virus.
OX NCBI_TaxID=357259 {ECO:0000313|EMBL:BAF50708.1};
RN [1] {ECO:0000313|EMBL:BAF50708.1}
RP NUCLEOTIDE SEQUENCE.
RC STRAIN=A/duck/Hokkaido/193/2004 {ECO:0000313|EMBL:BAF50708.1};
RA Jizou M., Kida H., Sakoda Y.;
RL Submitted (MAR-2007) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|EMBL:BAF50708.1}
RP NUCLEOTIDE SEQUENCE.
RC STRAIN=A/duck/Hokkaido/193/2004 {ECO:0000313|EMBL:BAF50708.1};
RA Kida H., Sakoda Y.;
RT "Antigenic and genetic analyses of H5 influenza viruses isolated from water
RT birds for the purpose of vaccine and diagnostic use.";
RL Submitted (APR-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:0000256|ARBA:ARBA00002148}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|ARBA:ARBA00004496}. Host
CC cytoplasm {ECO:0000256|ARBA:ARBA00004192}. Host nucleus
CC {ECO:0000256|ARBA:ARBA00004147}. Nucleus
CC {ECO:0000256|ARBA:ARBA00004123}.
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DR EMBL; AB299378; BAF50708.1; -; Genomic_RNA.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0030430; C:host cell cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0016020; C:membrane; IEA:UniProtKB-KW.
DR GO; GO:0000166; F:nucleotide binding; IEA:UniProtKB-KW.
DR GO; GO:0003723; F:RNA binding; IEA:InterPro.
DR GO; GO:0003968; F:RNA-dependent RNA polymerase activity; IEA:UniProtKB-KW.
DR GO; GO:0039523; P:suppression by virus of host mRNA transcription via inhibition of RNA polymerase II activity; IEA:UniProtKB-KW.
DR GO; GO:0039694; P:viral RNA genome replication; IEA:InterPro.
DR GO; GO:0019083; P:viral transcription; IEA:UniProtKB-KW.
DR InterPro; IPR007099; RNA-dir_pol_NSvirus.
DR InterPro; IPR001407; RNA_pol_PB1_influenza.
DR Pfam; PF00602; Flu_PB1; 1.
DR PROSITE; PS50525; RDRP_SSRNA_NEG_SEG; 1.
PE 4: Predicted;
KW Eukaryotic host gene expression shutoff by virus
KW {ECO:0000256|ARBA:ARBA00023247};
KW Eukaryotic host transcription shutoff by virus
KW {ECO:0000256|ARBA:ARBA00022731};
KW Host cytoplasm {ECO:0000256|ARBA:ARBA00023200};
KW Host gene expression shutoff by virus {ECO:0000256|ARBA:ARBA00022995};
KW Host nucleus {ECO:0000256|ARBA:ARBA00022562};
KW Host-virus interaction {ECO:0000256|ARBA:ARBA00022581};
KW Inhibition of host RNA polymerase II by virus
KW {ECO:0000256|ARBA:ARBA00023103}; Membrane {ECO:0000256|SAM:Phobius};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741};
KW Nucleotidyltransferase {ECO:0000256|ARBA:ARBA00022695};
KW Phosphoprotein {ECO:0000256|ARBA:ARBA00022553};
KW RNA-directed RNA polymerase {ECO:0000256|ARBA:ARBA00022484};
KW Transferase {ECO:0000256|ARBA:ARBA00022484};
KW Transmembrane {ECO:0000256|SAM:Phobius};
KW Transmembrane helix {ECO:0000256|SAM:Phobius};
KW Viral RNA replication {ECO:0000256|ARBA:ARBA00022953};
KW Viral transcription {ECO:0000256|ARBA:ARBA00023314}.
FT TRANSMEM 20..41
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT DOMAIN 1..98
FT /note="RdRp catalytic"
FT /evidence="ECO:0000259|PROSITE:PS50525"
FT NON_TER 1
FT /evidence="ECO:0000313|EMBL:BAF50708.1"
FT NON_TER 183
FT /evidence="ECO:0000313|EMBL:BAF50708.1"
SQ SEQUENCE 183 AA; 20694 MW; B9C0CA2CBE97DD3F CRC64;
RKKIEKIRPL LIDGTASLSP GMMMGMFNML STVLGVSILN LGQKRYTKTT YWWDGLQSSD
DFALIVNAPN HEGIQAGVDR FYRTCKLVGI NMSKKKSYIN RTGTFEFTSF FYRYGFVANF
SMELPSFGVS GINESADMSI GVTVIKNNMI NNDLGPATAQ MALQLFIKDY RYTYRCHRGD
TQI
//