NRAM_I63A3
ID NRAM_I63A3 Reviewed; 470 AA.
AC Q07599;
DT 01-OCT-1994, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-1994, sequence version 1.
DT 03-AUG-2022, entry version 132.
DE RecName: Full=Neuraminidase {ECO:0000255|HAMAP-Rule:MF_04071};
DE EC=3.2.1.18 {ECO:0000255|HAMAP-Rule:MF_04071};
GN Name=NA {ECO:0000255|HAMAP-Rule:MF_04071};
OS Influenza A virus (strain A/Duck/Ukraine/1/1963 H3N8).
OC Viruses; Riboviria; Orthornavirae; Negarnaviricota; Polyploviricotina;
OC Insthoviricetes; Articulavirales; Orthomyxoviridae; Alphainfluenzavirus.
OX NCBI_TaxID=385580;
OH NCBI_TaxID=8782; Aves.
OH NCBI_TaxID=9796; Equus caballus (Horse).
RN [1]
RP NUCLEOTIDE SEQUENCE.
RX PubMed=8460490; DOI=10.1006/viro.1993.1196;
RA Saito T., Kawaoka Y., Webster R.G.;
RT "Phylogenetic analysis of the N8 neuraminidase gene of influenza A
RT viruses.";
RL Virology 193:868-876(1993).
RN [2]
RP REVIEW.
RX PubMed=15567494; DOI=10.1016/j.virusres.2004.08.012;
RA Nayak D.P., Hui E.K., Barman S.;
RT "Assembly and budding of influenza virus.";
RL Virus Res. 106:147-165(2004).
RN [3]
RP REVIEW.
RX PubMed=16192481; DOI=10.1056/nejmra050740;
RA Moscona A.;
RT "Neuraminidase inhibitors for influenza.";
RL N. Engl. J. Med. 353:1363-1373(2005).
RN [4]
RP REVIEW.
RX PubMed=15744059; DOI=10.1248/bpb.28.399;
RA Suzuki Y.;
RT "Sialobiology of influenza: molecular mechanism of host range variation of
RT influenza viruses.";
RL Biol. Pharm. Bull. 28:399-408(2005).
CC -!- FUNCTION: Catalyzes the removal of terminal sialic acid residues from
CC viral and cellular glycoconjugates. Cleaves off the terminal sialic
CC acids on the glycosylated HA during virus budding to facilitate virus
CC release. Additionally helps virus spread through the circulation by
CC further removing sialic acids from the cell surface. These cleavages
CC prevent self-aggregation and ensure the efficient spread of the progeny
CC virus from cell to cell. Otherwise, infection would be limited to one
CC round of replication. Described as a receptor-destroying enzyme because
CC it cleaves a terminal sialic acid from the cellular receptors. May
CC facilitate viral invasion of the upper airways by cleaving the sialic
CC acid moieties on the mucin of the airway epithelial cells. Likely to
CC plays a role in the budding process through its association with lipid
CC rafts during intracellular transport. May additionally display a raft-
CC association independent effect on budding. Plays a role in the
CC determination of host range restriction on replication and virulence.
CC Sialidase activity in late endosome/lysosome traffic seems to enhance
CC virus replication. {ECO:0000255|HAMAP-Rule:MF_04071}.
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:0000255|HAMAP-
CC Rule:MF_04071};
CC -!- COFACTOR:
CC Name=Ca(2+); Xref=ChEBI:CHEBI:29108;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_04071};
CC -!- ACTIVITY REGULATION: Inhibited by the neuraminidase inhibitors
CC zanamivir (Relenza) and oseltamivir (Tamiflu). These drugs interfere
CC with the release of progeny virus from infected cells and are effective
CC against all influenza strains. Resistance to neuraminidase inhibitors
CC is quite rare. {ECO:0000255|HAMAP-Rule:MF_04071}.
CC -!- SUBUNIT: Homotetramer. {ECO:0000255|HAMAP-Rule:MF_04071}.
CC -!- SUBCELLULAR LOCATION: Virion membrane {ECO:0000255|HAMAP-
CC Rule:MF_04071}. Host apical cell membrane {ECO:0000255|HAMAP-
CC Rule:MF_04071}; Single-pass type II membrane protein
CC {ECO:0000255|HAMAP-Rule:MF_04071}. Note=Preferentially accumulates at
CC the apical plasma membrane in infected polarized epithelial cells,
CC which is the virus assembly site. Uses lipid rafts for cell surface
CC transport and apical sorting. In the virion, forms a mushroom-shaped
CC spike on the surface of the membrane. {ECO:0000255|HAMAP-
CC Rule:MF_04071}.
CC -!- DOMAIN: Intact N-terminus is essential for virion morphogenesis.
CC Possesses two apical sorting signals, one in the ectodomain, which is
CC likely to be a glycan, and the other in the transmembrane domain. The
CC transmembrane domain also plays a role in lipid raft association.
CC {ECO:0000255|HAMAP-Rule:MF_04071}.
CC -!- PTM: N-glycosylated. {ECO:0000255|HAMAP-Rule:MF_04071}.
CC -!- MISCELLANEOUS: The influenza A genome consist of 8 RNA segments.
CC Genetic variation of hemagglutinin and/or neuraminidase genes results
CC in the emergence of new influenza strains. The mechanism of variation
CC can be the result of point mutations or the result of genetic
CC reassortment between segments of two different strains.
CC -!- SIMILARITY: Belongs to the glycosyl hydrolase 34 family.
CC {ECO:0000255|HAMAP-Rule:MF_04071}.
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DR EMBL; L06576; AAA16234.1; -; Unassigned_RNA.
DR PDB; 2HT5; X-ray; 2.40 A; A=81-470.
DR PDB; 2HT7; X-ray; 2.60 A; A=81-470.
DR PDB; 2HT8; X-ray; 2.40 A; A=81-470.
DR PDB; 2HTQ; X-ray; 2.20 A; A=81-470.
DR PDB; 2HTR; X-ray; 2.50 A; A=81-470.
DR PDB; 2HTU; X-ray; 2.20 A; A=81-470.
DR PDB; 3O9J; X-ray; 2.00 A; A=81-467.
DR PDB; 3O9K; X-ray; 2.49 A; A=81-467.
DR PDB; 4D8S; X-ray; 2.40 A; A=81-470.
DR PDB; 4GB1; X-ray; 2.62 A; A=81-470.
DR PDB; 4KS1; X-ray; 2.20 A; A=81-470.
DR PDB; 4M3M; X-ray; 2.10 A; A=80-469.
DR PDB; 4MJU; X-ray; 2.35 A; A=81-469.
DR PDB; 4MJV; X-ray; 2.65 A; A=81-470.
DR PDBsum; 2HT5; -.
DR PDBsum; 2HT7; -.
DR PDBsum; 2HT8; -.
DR PDBsum; 2HTQ; -.
DR PDBsum; 2HTR; -.
DR PDBsum; 2HTU; -.
DR PDBsum; 3O9J; -.
DR PDBsum; 3O9K; -.
DR PDBsum; 4D8S; -.
DR PDBsum; 4GB1; -.
DR PDBsum; 4KS1; -.
DR PDBsum; 4M3M; -.
DR PDBsum; 4MJU; -.
DR PDBsum; 4MJV; -.
DR SMR; Q07599; -.
DR DIP; DIP-60415N; -.
DR BindingDB; Q07599; -.
DR ChEMBL; CHEMBL4295592; -.
DR CAZy; GH34; Glycoside Hydrolase Family 34.
DR BRENDA; 3.2.1.18; 7479.
DR EvolutionaryTrace; Q07599; -.
DR PRO; PR:Q07599; -.
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:InterPro.
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 1: Evidence at protein level;
KW 3D-structure; Calcium; Disulfide bond; Glycoprotein; Glycosidase;
KW Host cell membrane; Host membrane; Hydrolase; Membrane; Metal-binding;
KW Signal-anchor; Transmembrane; Transmembrane helix; Virion.
FT CHAIN 1..470
FT /note="Neuraminidase"
FT /id="PRO_0000078688"
FT TOPO_DOM 1..14
FT /note="Intravirion"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT TRANSMEM 15..35
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT TOPO_DOM 36..470
FT /note="Virion surface"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT REGION 11..32
FT /note="Involved in apical transport and lipid raft
FT association"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT REGION 32..86
FT /note="Hypervariable stalk region"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT REGION 89..470
FT /note="Head of neuraminidase"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT ACT_SITE 149
FT /note="Proton donor/acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT ACT_SITE 402
FT /note="Nucleophile"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT BINDING 116
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT BINDING 150
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT BINDING 275..276
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT BINDING 291
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT BINDING 292
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT BINDING 296
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT BINDING 322
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT BINDING 368
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT CARBOHYD 46
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT CARBOHYD 54
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT CARBOHYD 84
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT CARBOHYD 144
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT CARBOHYD 398
FT /note="N-linked (GlcNAc...) asparagine; by host"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT DISULFID 90..417
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT DISULFID 122..127
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT DISULFID 182..229
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT DISULFID 231..236
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT DISULFID 277..290
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT DISULFID 279..288
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT DISULFID 316..335
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT DISULFID 421..446
FT /evidence="ECO:0000255|HAMAP-Rule:MF_04071"
FT STRAND 96..100
FT /evidence="ECO:0007829|PDB:3O9J"
FT HELIX 103..106
FT /evidence="ECO:0007829|PDB:3O9J"
FT TURN 107..109
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 112..122
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 127..137
FT /evidence="ECO:0007829|PDB:3O9J"
FT HELIX 141..144
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 155..160
FT /evidence="ECO:0007829|PDB:3O9J"
FT HELIX 167..169
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 171..175
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 177..183
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 185..195
FT /evidence="ECO:0007829|PDB:3O9J"
FT HELIX 197..199
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 201..215
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 217..220
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 222..224
FT /evidence="ECO:0007829|PDB:2HTQ"
FT STRAND 226..228
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 230..232
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 235..243
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 245..247
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 250..257
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 260..266
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 275..282
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 285..291
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 294..298
FT /evidence="ECO:0007829|PDB:4M3M"
FT STRAND 300..304
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 310..314
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 317..319
FT /evidence="ECO:0007829|PDB:4M3M"
FT STRAND 322..324
FT /evidence="ECO:0007829|PDB:3O9J"
FT HELIX 328..330
FT /evidence="ECO:0007829|PDB:4M3M"
FT STRAND 335..337
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 350..353
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 356..361
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 363..376
FT /evidence="ECO:0007829|PDB:3O9J"
FT TURN 377..381
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 387..399
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 403..408
FT /evidence="ECO:0007829|PDB:3O9J"
FT HELIX 410..413
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 415..429
FT /evidence="ECO:0007829|PDB:3O9J"
FT TURN 430..432
FT /evidence="ECO:0007829|PDB:3O9J"
FT STRAND 433..436
FT /evidence="ECO:0007829|PDB:2HTQ"
FT STRAND 438..446
FT /evidence="ECO:0007829|PDB:3O9J"
FT HELIX 466..468
FT /evidence="ECO:0007829|PDB:4M3M"
SQ SEQUENCE 470 AA; 51960 MW; B46D54A03AC84CCE CRC64;
MNPNQKIITI GSISLGLVVF NVLLHVVSII VTVLVLGKGG NNGICNETVV REYNETVRIE
KVTQWHNTNV VEYVPYWNGG TYMNNTEAIC DAKGFAPFSK DNGIRIGSRG HIFVIREPFV
SCSPIECRTF FLTQGSLLND KHSNGTVKDR SPFRTLMSVE VGQSPNVYQA RFEAVAWSAT
ACHDGKKWMT VGVTGPDSKA VAVIHYGGVP TDVVNSWAGD ILRTQESSCT CIQGDCYWVM
TDGPANRQAQ YRIYKANQGR IIGQTDISFN GGHIEECSCY PNDGKVECVC RDGWTGTNRP
VLVISPDLSY RVGYLCAGIP SDTPRGEDTQ FTGSCTSPMG NQGYGVKGFG FRQGTDVWMG
RTISRTSRSG FEILRIKNGW TQTSKEQIRK QVVVDNLNWS GYSGSFTLPV ELSGKDCLVP
CFWVEMIRGK PEEKTIWTSS SSIVMCGVDY EVADWSWHDG AILPFDIDKM
