ID D7S0N3_9INFA Unreviewed; 469 AA. AC D7S0N3; DT 10-AUG-2010, integrated into UniProtKB/TrEMBL. DT 10-AUG-2010, sequence version 1. DT 14-OCT-2015, entry version 21. DE RecName: Full=Neuraminidase {ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00062759}; DE EC=3.2.1.18 {ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00063188}; GN Name=NA {ECO:0000256|RuleBase:RU361252, ECO:0000313|EMBL:ADH83355.1}; OS Influenza A virus (A/swine/Guangdong/05/2009(H1N1)). OC Viruses; ssRNA viruses; ssRNA negative-strand viruses; OC Orthomyxoviridae; Influenzavirus A. OX NCBI_TaxID=764142 {ECO:0000313|EMBL:ADH83355.1}; RN [1] {ECO:0000313|EMBL:ADH83355.1} RP NUCLEOTIDE SEQUENCE. RC STRAIN=A/swine/Guangdong/05/2009 {ECO:0000313|EMBL:ADH83355.1}; RX PubMed=21418598; RA Liu Y., Ji J., Xie Q., Wang J., Shang H., Chen C., Chen F., Xue C., RA Cao Y., Ma J., Bi Y.; RT "Isolation and complete genomic characterization of H1N1 subtype swine RT influenza viruses in southern China through the 2009 pandemic."; RL Virol. J. 8:129-129(2011). CC -!- FUNCTION: Catalyzes the removal of terminal sialic acid residues CC from viral and cellular glycoconjugates. CC {ECO:0000256|RuleBase:RU361252}. CC -!- FUNCTION: Catalyzes the removal of terminal sialic acid residues CC from viral and cellular glycoconjugates. Cleaves off the terminal CC sialic acids on the glycosylated HA during virus budding to CC facilitate virus release. Additionally helps virus spread through CC the circulation by further removing sialic acids from the cell CC surface. These cleavages prevent self-aggregation and ensure the CC efficient spread of the progeny virus from cell to cell. CC Otherwise, infection would be limited to one round of replication. CC Described as a receptor-destroying enzyme because it cleaves a CC terminal sialic acid from the cellular receptors. May facilitate CC viral invasion of the upper airways by cleaving the sialic acid CC moities on the mucin of the airway epithelial cells. Likely to CC plays a role in the budding process through its association with CC lipid rafts during intracellular transport. May additionally CC display a raft-association independent effect on budding. Plays a CC role in the determination of host range restriction on replication CC and virulence. Sialidase activity in late endosome/lysosome CC traffic seems to enhance virus replication (By similarity). CC {ECO:0000256|SAAS:SAAS00234776}. CC -!- CATALYTIC ACTIVITY: Hydrolysis of alpha-(2->3)-, alpha-(2->6)-, CC alpha-(2->8)- glycosidic linkages of terminal sialic acid residues CC in oligosaccharides, glycoproteins, glycolipids, colominic acid CC and synthetic substrates. {ECO:0000256|RuleBase:RU361252, CC ECO:0000256|SAAS:SAAS00062942}. CC -!- COFACTOR: CC Name=Ca(2+); Xref=ChEBI:CHEBI:29108; CC Evidence={ECO:0000256|RuleBase:RU361252}; CC Note=Binds 1 Ca(2+) ion per subunit. CC {ECO:0000256|RuleBase:RU361252}; CC -!- SUBUNIT: Homotetramer. {ECO:0000256|RuleBase:RU361252, CC ECO:0000256|SAAS:SAAS00063168}. CC -!- SUBCELLULAR LOCATION: Virion membrane CC {ECO:0000256|RuleBase:RU361252}. Host apical cell membrane CC {ECO:0000256|RuleBase:RU361252}; Single-pass type II membrane CC protein {ECO:0000256|RuleBase:RU361252}. CC -!- PTM: N-glycosylated. {ECO:0000256|RuleBase:RU361252}. CC -!- SIMILARITY: Belongs to the glycosyl hydrolase 34 family. CC {ECO:0000256|RuleBase:RU361252}. 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; HM215161; ADH83355.1; -; Viral_cRNA. DR GO; GO:0020002; C:host cell plasma membrane; IEA:UniProtKB-SubCell. DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW. DR GO; GO:0055036; C:virion membrane; IEA:UniProtKB-SubCell. DR GO; GO:0052794; F:exo-alpha-(2->3)-sialidase activity; IEA:UniProtKB-EC. DR GO; GO:0052795; F:exo-alpha-(2->6)-sialidase activity; IEA:UniProtKB-EC. DR GO; GO:0052796; F:exo-alpha-(2->8)-sialidase activity; IEA:UniProtKB-EC. DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW. DR GO; GO:0005975; P:carbohydrate metabolic process; IEA:InterPro. DR Gene3D; 2.120.10.10; -; 1. DR InterPro; IPR001860; Glyco_hydro_34. DR InterPro; IPR011040; Sialidases. DR Pfam; PF00064; Neur; 1. DR SUPFAM; SSF50939; SSF50939; 1. PE 3: Inferred from homology; KW Calcium {ECO:0000256|RuleBase:RU361252, KW ECO:0000256|SAAS:SAAS00062903}; KW Disulfide bond {ECO:0000256|SAAS:SAAS00063019}; KW Glycoprotein {ECO:0000256|RuleBase:RU361252}; KW Glycosidase {ECO:0000256|RuleBase:RU361252, KW ECO:0000256|SAAS:SAAS00062426}; KW Host cell membrane {ECO:0000256|RuleBase:RU361252, KW ECO:0000256|SAAS:SAAS00062854}; KW Host membrane {ECO:0000256|RuleBase:RU361252, KW ECO:0000256|SAAS:SAAS00062524}; KW Hydrolase {ECO:0000256|RuleBase:RU361252, KW ECO:0000256|SAAS:SAAS00063156}; KW Membrane {ECO:0000256|SAAS:SAAS00114461, ECO:0000256|SAM:Phobius}; KW Metal-binding {ECO:0000256|RuleBase:RU361252, KW ECO:0000256|SAAS:SAAS00062292}; KW Transmembrane {ECO:0000256|SAAS:SAAS00114524, KW ECO:0000256|SAM:Phobius}; KW Transmembrane helix {ECO:0000256|SAAS:SAAS00114517, KW ECO:0000256|SAM:Phobius}; KW Virion {ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00063088}. FT TRANSMEM 7 34 Helical. {ECO:0000256|SAM:Phobius}. SQ SEQUENCE 469 AA; 51620 MW; A99854E3EAF04229 CRC64; MNTNQRIITI GTACLIIGIV SLLLRIGNIV SLWISHSIQT GEKNHSETCN RNTITYENST WVNQTYVNIS NINIAGGQGV ASIILAGNSS LCPVNGWAIY SKDNSIRIGS KGDIFVIREP FISCSHLECR TFFLTQGALL NDRHSNGTVK DRSPYRTLMS CPIGEAPSPY NSKFESVAWS ASACHDGMGW LTIGISGPDN GAVAVLKYNG IITDTIKSWR NRILRTQESE CVCINGSCFT IMTDGPSNGQ ASYKIFKMER GKIIKSVELD APNYHYEECS CYPDTGKVVC VCRDNWHASN RPWVSFDQNL DYQIGYICSG VFGDNPRSND GKGNCGPVLS NGANGVKGFS FRYGNGVWIG RTKSTNSRSG FEMIWDPNGW TETDSNFSMK QDIIALTDWS GYSGSFVQHP ELTGVNCIRP CFWVELIRGQ PKESTIWTSG SSISFCGVDS ETASWSWPDG ADLPFTIDK //