ID I0AWZ8_9INFA Unreviewed; 466 AA. AC I0AWZ8; DT 13-JUN-2012, integrated into UniProtKB/TrEMBL. DT 13-JUN-2012, sequence version 1. DT 13-NOV-2019, entry version 47. DE RecName: Full=Neuraminidase {ECO:0000256|HAMAP-Rule:MF_04071, ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00397549}; DE EC=3.2.1.18 {ECO:0000256|HAMAP-Rule:MF_04071, ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00397416}; GN Name=NA {ECO:0000256|HAMAP-Rule:MF_04071, GN ECO:0000256|RuleBase:RU361252, ECO:0000313|EMBL:AFH53512.1}; OS Influenza A virus (A/chicken/Guangdong/LYH12/2011(H9N2)). OC Viruses; Riboviria; Negarnaviricota; Polyploviricotina; OC Insthoviricetes; Articulavirales; Orthomyxoviridae; OC Alphainfluenzavirus. OX NCBI_TaxID=1161301 {ECO:0000313|EMBL:AFH53512.1}; RN [1] {ECO:0000313|EMBL:AFH53512.1} RP NUCLEOTIDE SEQUENCE. RC STRAIN=A/chicken/Guangdong/LYH12/2011 {ECO:0000313|EMBL:AFH53512.1}; RX PubMed=24682938; DOI=10.1007/s11262-014-1060-1; RA Xue Y., Wang J.L., Yan Z.Q., Li G.W., Chen S.Y., Zhang X.B., Qin J.P., RA Li H.Y., Chang S., Chen F., Bee Y.Z., Xie Q.M.; RT "Sequence and phylogenetic analysis of surface protein genes of RT emerging H9N2 influenza viruses isolated from poultry in two RT geographical regions of China."; RL Virus Genes 48:479-485(2014). 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. {ECO:0000256|HAMAP- CC Rule:MF_04071, ECO:0000256|SAAS:SAAS00844152}. CC -!- CATALYTIC ACTIVITY: CC Reaction=Hydrolysis of alpha-(2->3)-, alpha-(2->6)-, alpha- CC (2->8)- glycosidic linkages of terminal sialic acid residues in CC oligosaccharides, glycoproteins, glycolipids, colominic acid and CC synthetic substrates.; EC=3.2.1.18; Evidence={ECO:0000256|HAMAP- CC Rule:MF_04071, ECO:0000256|RuleBase:RU361252, CC ECO:0000256|SAAS:SAAS01126145}; CC -!- COFACTOR: CC Name=Ca(2+); Xref=ChEBI:CHEBI:29108; Evidence={ECO:0000256|HAMAP- CC Rule:MF_04071, ECO:0000256|RuleBase:RU361252, CC ECO:0000256|SAAS:SAAS00612833}; CC -!- ACTIVITY REGULATION: Inhibited by the neuraminidase inhibitors CC zanamivir (Relenza) and oseltamivir (Tamiflu). These drugs CC interfere with the release of progeny virus from infected cells CC and are effective against all influenza strains. Resistance to CC neuraminidase inhibitors is quite rare. {ECO:0000256|HAMAP- CC Rule:MF_04071, ECO:0000256|SAAS:SAAS01070481}. CC -!- SUBUNIT: Homotetramer. {ECO:0000256|HAMAP-Rule:MF_04071, CC ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00397177}. CC -!- SUBCELLULAR LOCATION: Host apical cell membrane CC {ECO:0000256|HAMAP-Rule:MF_04071, ECO:0000256|SAAS:SAAS00582107}; CC Single-pass type II membrane protein {ECO:0000256|HAMAP- CC Rule:MF_04071, ECO:0000256|SAAS:SAAS00582107}. Virion membrane CC {ECO:0000256|HAMAP-Rule:MF_04071}. Note=Preferentially accumulates CC at the apical plasma membrane in infected polarized epithelial CC cells, which is the virus assembly site. Uses lipid rafts for cell CC surface transport and apical sorting. In the virion, forms a CC mushroom-shaped spike on the surface of the membrane. CC {ECO:0000256|HAMAP-Rule:MF_04071}. CC -!- DOMAIN: Intact N-terminus is essential for virion morphogenesis. CC Possess two apical sorting signals, one in the ectodomain, which CC is likely to be a glycan, and the other in the transmembrane CC domain. The transmembrane domain also plays a role in lipid raft CC association. {ECO:0000256|HAMAP-Rule:MF_04071}. CC -!- PTM: N-glycosylated. {ECO:0000256|HAMAP-Rule:MF_04071, CC ECO:0000256|RuleBase:RU361252}. CC -!- SIMILARITY: Belongs to the glycosyl hydrolase 34 family. CC {ECO:0000256|HAMAP-Rule:MF_04071, ECO:0000256|RuleBase:RU361252, CC ECO:0000256|SAAS:SAAS00582269}. CC -!- CAUTION: Lacks conserved residue(s) required for the propagation CC of feature annotation. {ECO:0000256|HAMAP-Rule:MF_04071}. 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; JQ770145; AFH53512.1; -; 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-UniRule. DR GO; GO:0055036; C:virion membrane; IEA:UniProtKB-SubCell. DR GO; GO:0052794; F:exo-alpha-(2->3)-sialidase activity; IEA:UniProtKB-UniRule. DR GO; GO:0052795; F:exo-alpha-(2->6)-sialidase activity; IEA:UniProtKB-UniRule. DR GO; GO:0052796; F:exo-alpha-(2->8)-sialidase activity; IEA:UniProtKB-UniRule. DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-UniRule. DR GO; GO:0005975; P:carbohydrate metabolic process; IEA:UniProtKB-UniRule. DR GO; GO:0046761; P:viral budding from plasma membrane; IEA:UniProtKB-UniRule. DR CDD; cd15483; Influenza_NA; 1. DR HAMAP; MF_04071; INFV_NRAM; 1. DR InterPro; IPR001860; Glyco_hydro_34. DR InterPro; IPR033654; Sialidase_Influenza_A/B. DR InterPro; IPR036278; Sialidase_sf. DR Pfam; PF00064; Neur; 1. DR SUPFAM; SSF50939; SSF50939; 1. PE 3: Inferred from homology; KW Calcium {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00474703}; KW Disulfide bond {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|SAAS:SAAS00474860}; KW Glycoprotein {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|RuleBase:RU361252}; KW Glycosidase {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00474810}; KW Host cell membrane {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00474912}; KW Host membrane {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00475059}; KW Hydrolase {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00475017}; KW Membrane {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|SAAS:SAAS00474571}; KW Metal-binding {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00474602}; KW Signal-anchor {ECO:0000256|HAMAP-Rule:MF_04071}; KW Transmembrane {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|SAAS:SAAS00474655}; KW Transmembrane helix {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|SAAS:SAAS00475130}; KW Virion {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00475258}. FT TRANSMEM 7 29 Helical. {ECO:0000256|HAMAP-Rule: FT MF_04071}. FT REGION 11 33 Involved in apical transport and lipid FT raft association. {ECO:0000256|HAMAP- FT Rule:MF_04071}. FT REGION 88 466 Head of neuraminidase. FT {ECO:0000256|HAMAP-Rule:MF_04071}. FT REGION 273 274 Substrate binding. {ECO:0000256|HAMAP- FT Rule:MF_04071}. FT REGION 323 347 Disordered. {ECO:0000256|SAM:MobiDB- FT lite}. FT COMPBIAS 323 338 Polar. {ECO:0000256|SAM:MobiDB-lite}. FT ACT_SITE 148 148 Proton donor/acceptor. FT {ECO:0000256|HAMAP-Rule:MF_04071}. FT ACT_SITE 403 403 Nucleophile. {ECO:0000256|HAMAP-Rule: FT MF_04071}. FT METAL 290 290 Calcium; via carbonyl oxygen. FT {ECO:0000256|HAMAP-Rule:MF_04071}. FT METAL 294 294 Calcium; via carbonyl oxygen. FT {ECO:0000256|HAMAP-Rule:MF_04071}. FT METAL 321 321 Calcium. {ECO:0000256|HAMAP-Rule: FT MF_04071}. FT BINDING 115 115 Substrate. {ECO:0000256|HAMAP-Rule: FT MF_04071}. FT BINDING 149 149 Substrate. {ECO:0000256|HAMAP-Rule: FT MF_04071}. FT BINDING 289 289 Substrate. {ECO:0000256|HAMAP-Rule: FT MF_04071}. FT BINDING 368 368 Substrate. {ECO:0000256|HAMAP-Rule: FT MF_04071}. FT DISULFID 89 414 {ECO:0000256|HAMAP-Rule:MF_04071}. FT DISULFID 121 126 {ECO:0000256|HAMAP-Rule:MF_04071}. FT DISULFID 180 227 {ECO:0000256|HAMAP-Rule:MF_04071}. FT DISULFID 229 234 {ECO:0000256|HAMAP-Rule:MF_04071}. FT DISULFID 275 288 {ECO:0000256|HAMAP-Rule:MF_04071}. FT DISULFID 277 286 {ECO:0000256|HAMAP-Rule:MF_04071}. SQ SEQUENCE 466 AA; 51612 MW; 9CCCDBDD25864292 CRC64; MNPNQKIIAI GSVSLIIAII CLLMQIAILT TTMTLHFRQN ECSNPSNNQV MPCEPIIIER NTVHLNSTTI EREICPKVAE YKNWSKPQCQ ITGFAPFSKD NSIRLSAGGD IWVTREPYVS CSLDKCYHFA LGQGTTLKNK HSNGTTHDRT PHRTLLMNEL GVPFHLGTKQ VCIAWSSSSC YDGKAWLHIC VTGDDKNATA SIIYDGMLVD SIGSWSKNIL RTQESECVCI NGTCAVVMTD GSASGKADTR VLFIREGKII NISPLSGSAQ HVEECSCYPR YPEVRCVCRD NWKGSNRPIL YINMADYSIE SSYVCSGLVG DTPRNDDSSS SSNCRDPNNE RGAPGVKGWA FDDGNDVWMG RTIKNGSRSG YETFRVVNGW TMANSKSQIN RQVIVDSDDW SGYSGIFSVE GKKCINRCFY VELIRGRPQE PRVWWTSNSI IVFCGTSGTY GTGSWPDGAN INFMPI //