ID A0A0U2SS25_9INFA Unreviewed; 230 AA. AC A0A0U2SS25; DT 16-MAR-2016, integrated into UniProtKB/TrEMBL. DT 16-MAR-2016, sequence version 1. DT 23-MAY-2018, entry version 18. DE RecName: Full=Non-structural protein 1 {ECO:0000256|RuleBase:RU362113, ECO:0000256|SAAS:SAAS00965123}; DE Short=NS1 {ECO:0000256|RuleBase:RU362113}; GN Name=NS1 {ECO:0000313|EMBL:ALR82593.1}; GN Synonyms=NS {ECO:0000256|RuleBase:RU362113}; OS Influenza A virus (A/wild bird/Wuhan/WHHN58/2014(H1N1)). OC Viruses; ssRNA viruses; ssRNA negative-strand viruses; OC Orthomyxoviridae; Alphainfluenzavirus. OX NCBI_TaxID=1756090 {ECO:0000313|EMBL:ALR82593.1, ECO:0000313|Proteomes:UP000119134}; RN [1] {ECO:0000313|EMBL:ALR82593.1, ECO:0000313|Proteomes:UP000119134} RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=A/wild bird/Wuhan/WHHN58/2014 {ECO:0000313|EMBL:ALR82593.1}; RA Chen L.-J., Lin X.-D., Guo W.-P., Tian J.-H., Zhang Y.-Z.; RT "Diversity and evolution of avian influenza viruses in live poultry RT markets, free range poultry and wetland regions in China."; RL Submitted (NOV-2015) to the EMBL/GenBank/DDBJ databases. CC -!- FUNCTION: Inhibits post-transcriptional processing of cellular CC pre-mRNA, by binding and inhibiting two cellular proteins that are CC required for the 3'-end processing of cellular pre-mRNAs: the 30 CC kDa cleavage and polyadenylation specificity factor/CPSF4 and the CC poly(A)-binding protein 2/PABPN1. In turn, unprocessed 3' end pre- CC mRNAs accumulate in the host nucleus and are no longer exported to CC the cytoplasm. Cellular protein synthesis is thereby shut off very CC early after virus infection. Viral protein synthesis is not CC affected by the inhibition of the cellular 3' end processing CC machinery because the poly(A) tails of viral mRNAs are produced by CC the viral polymerase through a stuttering mechanism. CC {ECO:0000256|RuleBase:RU362113, ECO:0000256|SAAS:SAAS01036581}. CC -!- FUNCTION: Prevents the establishment of the cellular antiviral CC state by inhibiting TRIM25-mediated DDX58 ubiquitination, which CC normally triggers the antiviral transduction signal that leads to CC the activation of type I IFN genes by transcription factors IRF3 CC and IRF7. Prevents human EIF2AK2/PKR activation, either by binding CC double-strand RNA, or by interacting directly with EIF2AK2/PKR. CC This function may be important at the very beginning of the CC infection, when NS1 is mainly present in the cytoplasm. Also binds CC poly(A) and U6 snRNA. {ECO:0000256|RuleBase:RU362113, CC ECO:0000256|SAAS:SAAS01036591}. CC -!- SUBUNIT: Homodimer. Interacts with host TRIM25 (via coiled coil); CC this interaction specifically inhibits TRIM25 multimerization and CC TRIM25-mediated DDX58 CARD ubiquitination. Interacts with human CC EIF2AK2/PKR, CPSF4, IVNS1ABP and PABPN1. CC {ECO:0000256|RuleBase:RU362113, ECO:0000256|SAAS:SAAS01036600}. CC -!- SUBCELLULAR LOCATION: Host cytoplasm CC {ECO:0000256|RuleBase:RU362113, ECO:0000256|SAAS:SAAS00965118}. CC Host nucleus {ECO:0000256|RuleBase:RU362113}. CC -!- DOMAIN: The dsRNA-binding region is required for suppression of CC RNA silencing. {ECO:0000256|RuleBase:RU362113}. CC -!- SIMILARITY: Belongs to the influenza A viruses NS1 family. CC {ECO:0000256|RuleBase:RU362113, ECO:0000256|SAAS:SAAS01036574}. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; KU143424; ALR82593.1; -; Viral_cRNA. DR ProteinModelPortal; A0A0U2SS25; -. DR Proteomes; UP000119134; 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:0003723; F:RNA binding; IEA:UniProtKB-KW. DR GO; GO:0039524; P:suppression by virus of host mRNA processing; IEA:UniProtKB-UniRule. DR GO; GO:0039580; P:suppression by virus of host PKR activity; IEA:UniProtKB-KW. DR GO; GO:0039540; P:suppression by virus of host RIG-I activity; IEA:UniProtKB-KW. DR GO; GO:0039502; P:suppression by virus of host type I interferon-mediated signaling pathway; IEA:UniProtKB-KW. DR Gene3D; 3.30.420.330; -; 1. DR HAMAP; MF_04066; INFV_NS1; 1. DR InterPro; IPR004208; NS1. DR InterPro; IPR000256; NS1A. DR InterPro; IPR038064; NS1A_effect_dom_like_sp. DR InterPro; IPR009068; S15_NS1_RNA-bd. DR Pfam; PF00600; Flu_NS1; 1. DR SUPFAM; SSF143021; SSF143021; 1. DR SUPFAM; SSF47060; SSF47060; 1. PE 3: Inferred from homology; KW Complete proteome {ECO:0000313|Proteomes:UP000119134}; KW Eukaryotic host gene expression shutoff by virus KW {ECO:0000256|RuleBase:RU362113, ECO:0000256|SAAS:SAAS01036575}; KW Host cytoplasm {ECO:0000256|RuleBase:RU362113, KW ECO:0000256|SAAS:SAAS00965142}; KW Host gene expression shutoff by virus {ECO:0000256|RuleBase:RU362113, KW ECO:0000256|SAAS:SAAS01036577}; KW Host mRNA suppression by virus {ECO:0000256|RuleBase:RU362113, KW ECO:0000256|SAAS:SAAS01036583}; KW Host nucleus {ECO:0000256|RuleBase:RU362113, KW ECO:0000256|SAAS:SAAS00965098}; KW Host-virus interaction {ECO:0000256|RuleBase:RU362113, KW ECO:0000256|SAAS:SAAS00965144}; KW Inhibition of host innate immune response by virus KW {ECO:0000256|SAAS:SAAS00965111}; KW Inhibition of host interferon signaling pathway by virus KW {ECO:0000256|SAAS:SAAS00965146}; KW Inhibition of host PKR by virus {ECO:0000256|SAAS:SAAS00965157}; KW Inhibition of host pre-mRNA processing by virus KW {ECO:0000256|RuleBase:RU362113, ECO:0000256|SAAS:SAAS01036585}; KW Inhibition of host RIG-I by virus {ECO:0000256|SAAS:SAAS01036586}; KW Inhibition of host RLR pathway by virus KW {ECO:0000256|SAAS:SAAS01036584}; KW Interferon antiviral system evasion {ECO:0000256|RuleBase:RU362113, KW ECO:0000256|SAAS:SAAS00965145}; KW RNA-binding {ECO:0000256|RuleBase:RU362113, KW ECO:0000256|SAAS:SAAS00965112}; KW Viral immunoevasion {ECO:0000256|SAAS:SAAS00965157}. SQ SEQUENCE 230 AA; 26071 MW; 4514E86F929B5EC3 CRC64; MDSNTVSSFQ VDCFLWHVRK RFADQELGDA PFLDRLRRDQ KSLRGRGSTL GLDIETATRA GKQIVERILE EESDEALKMT IASVPASRYL TDMTLEEMSR DWFMLMPKQK VAGSLCIRMD QAIMDKNITL KANFSVIFDR LETLILLRAF TEEGAIVGEI SPLPSLPGHT DEDVKNAIGV LIGGLEWNDN TVRVSETLQR FAWRSSNEDG RPPLPPKQKR KMARTIESEV //