ID B1A803_9INFA Unreviewed; 468 AA. AC B1A803; DT 08-APR-2008, integrated into UniProtKB/TrEMBL. DT 08-APR-2008, sequence version 1. DT 16-JAN-2019, entry version 61. DE RecName: Full=Neuraminidase {ECO:0000256|HAMAP-Rule:MF_04071, ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00114532}; DE EC=3.2.1.18 {ECO:0000256|HAMAP-Rule:MF_04071, ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00114514}; GN Name=NA {ECO:0000256|HAMAP-Rule:MF_04071, GN ECO:0000256|RuleBase:RU361252, ECO:0000313|EMBL:ACA04654.1}; OS Influenza A virus (A/duck/Eastern China/488/2003(H10N3)). OC Viruses; ssRNA viruses; ssRNA negative-strand viruses; OC Orthomyxoviridae; Alphainfluenzavirus. OX NCBI_TaxID=503313 {ECO:0000313|EMBL:ACA04654.1}; RN [1] {ECO:0000313|EMBL:ACA04654.1} RP NUCLEOTIDE SEQUENCE. RC STRAIN=A/duck/Eastern China/488/2003 {ECO:0000313|EMBL:ACA04654.1}; RA Qiu B.-F., Liu W.-J., Peng D.-X., Hu S.-L., Tang Y.-H., Liu X.-F.; RL Submitted (JAN-2008) to the EMBL/GenBank/DDBJ databases. RN [2] {ECO:0000313|EMBL:ACA04654.1} RP NUCLEOTIDE SEQUENCE. RC STRAIN=A/duck/Eastern China/488/2003 {ECO:0000313|EMBL:ACA04654.1}; RX PubMed=18984006; DOI=10.1016/j.jviromet.2008.10.001; RA Qiu B.F., Liu W.J., Peng D.X., Hu S.L., Tang Y.H., Liu X.F.; RT "A reverse transcription-PCR for subtyping of the neuraminidase of RT avian influenza viruses."; RL J. Virol. Methods 155:193-198(2009). 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:SAAS01116071}; 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:SAAS00114476}. 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; EU429712; ACA04654.1; -; mRNA. DR CAZy; GH34; Glycoside Hydrolase Family 34. 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-UniRule. 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 HAMAP; MF_04071; INFV_NRAM; 1. DR InterPro; IPR001860; Glyco_hydro_34. DR InterPro; IPR036278; Sialidase_sf. DR Pfam; PF00064; Neur; 1. DR SUPFAM; SSF50939; SSF50939; 1. PE 2: Evidence at transcript level; KW Calcium {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00114513}; KW Disulfide bond {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|SAAS:SAAS00114594}; 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:SAAS00114535}; KW Host cell membrane {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00114522}; KW Host membrane {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00114565}; KW Hydrolase {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00114491}; KW Membrane {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|SAAS:SAAS00114461}; KW Metal-binding {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00114385}; KW Signal-anchor {ECO:0000256|HAMAP-Rule:MF_04071}; KW Transmembrane {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|SAAS:SAAS00114524}; KW Transmembrane helix {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|SAAS:SAAS00114517}; KW Virion {ECO:0000256|HAMAP-Rule:MF_04071, KW ECO:0000256|RuleBase:RU361252, ECO:0000256|SAAS:SAAS00114362}. FT TRANSMEM 7 31 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 90 468 Head of neuraminidase. FT {ECO:0000256|HAMAP-Rule:MF_04071}. FT REGION 277 278 Substrate binding. {ECO:0000256|HAMAP- FT Rule:MF_04071}. FT ACT_SITE 150 150 Proton donor/acceptor. FT {ECO:0000256|HAMAP-Rule:MF_04071}. FT ACT_SITE 404 404 Nucleophile. {ECO:0000256|HAMAP-Rule: FT MF_04071}. FT METAL 293 293 Calcium; via carbonyl oxygen. FT {ECO:0000256|HAMAP-Rule:MF_04071}. FT METAL 297 297 Calcium; via carbonyl oxygen. FT {ECO:0000256|HAMAP-Rule:MF_04071}. FT METAL 323 323 Calcium. {ECO:0000256|HAMAP-Rule: FT MF_04071}. FT BINDING 117 117 Substrate. {ECO:0000256|HAMAP-Rule: FT MF_04071}. FT BINDING 151 151 Substrate. {ECO:0000256|HAMAP-Rule: FT MF_04071}. FT BINDING 292 292 Substrate. {ECO:0000256|HAMAP-Rule: FT MF_04071}. FT BINDING 369 369 Substrate. {ECO:0000256|HAMAP-Rule: FT MF_04071}. FT DISULFID 123 128 {ECO:0000256|HAMAP-Rule:MF_04071}. FT DISULFID 183 230 {ECO:0000256|HAMAP-Rule:MF_04071}. FT DISULFID 232 237 {ECO:0000256|HAMAP-Rule:MF_04071}. SQ SEQUENCE 468 AA; 51631 MW; DA1216C047E89C94 CRC64; MNPNQKITTI GVVSTTLSTI ALLIGIGNLI FNTVIHEKIG DHQTVVYPTI TAPVVPNCSD TIITYNNTVV NNITTIITKA ETHFKSSLPL CPFRGFFPFH KDNAIRLGEN KNVIATREPY VSCDNDDCWS FALAQGALLG TKHSNGTIKD RTPYRSLIRF PIGTAPVLGN YKEICVAWSS SSCFDGKEWM HVCMTGNDND ASGQIMYAGK MTDSIKSWRK DILRTQESEC QCIDGTCVVA VTDGPAASSA DHRIYWIREG KVLKYENIPK TKIQHLEECS CYVDIDVYCI CRDNWKGSNR PWMRINNETI LETGYVCSKF HSDTPRPADP STVSCDSPSN VNGGPGVKGF GFKTGNDVWL GRTVSTSGRS GFEIIKVTEG WINSPNHAKS VTQTLVSNND WSGYSGSFIV ENNGCFQPCF YIELIRGRPN KNDDVSWTSN SIVTFCGLDN EPGSGNWPDG SNIGFMPK //