Reviewed
Aves [TaxID: 8782]; Homo Sapiens (Human) [TaxID: 9606]
NA
Neuraminidase (EC 3.2.1.18)
Influenza A Virus (strain A/Tokyo/3/1967 H2N2)
Viruses> SsRNA Viruses> SsRNA Negative-strand Viruses> Orthomyxoviridae> Alphainfluenzavirus> Influenza A Virus> H2N2 Subtype> Influenza A Virus (strain A/Tokyo/3/1967 H2N2)
Not Available
Various pathway(s) in which protein is involved
Not Available
Not Available
MNPNQKIITIGSVSLTIATVCFLMQIAILVTTVTLHFKQHECDSPASNQVMPCEPIIIERNITEIVYLNNTTIEKEICPKVVEYRNWSKPQCQITGFAPF
SKDNSIRLSAGGDIWVTREPYVSCDPVKCYQFALGQGTTLDNKHSNDTVHDRIPHRTLLMNELGVPFHLGTRQVCIAWSSSSCHDGKAWLHVCITGDDKN
ATASFIYDGRLVDSIGSWSQNILRTQESECVCINGTCTVVMTDGSASGRADTRILFIEEGKIVHISPLAGSAQHVEECSCYPRYPGVRCICRDNWKGSNR
PVVDINMEDYSIDSSYVCSGLVGDTPRNDDRSSNSNCRNPNNERGTQGVKGWAFDNGNDLWMGRTISKDLRSGYETFKVIGGWSTPNSKSQINRQVIVDS
DNRSGYSGIFSVEGKSCINRCFYVELIRGRKQETRVWWTSNSIVVFCGTSGTYGTGSWPDGANINFMPI
SKDNSIRLSAGGDIWVTREPYVSCDPVKCYQFALGQGTTLDNKHSNDTVHDRIPHRTLLMNELGVPFHLGTRQVCIAWSSSSCHDGKAWLHVCITGDDKN
ATASFIYDGRLVDSIGSWSQNILRTQESECVCINGTCTVVMTDGSASGRADTRILFIEEGKIVHISPLAGSAQHVEECSCYPRYPGVRCICRDNWKGSNR
PVVDINMEDYSIDSSYVCSGLVGDTPRNDDRSSNSNCRNPNNERGTQGVKGWAFDNGNDLWMGRTISKDLRSGYETFKVIGGWSTPNSKSQINRQVIVDS
DNRSGYSGIFSVEGKSCINRCFYVELIRGRKQETRVWWTSNSIVVFCGTSGTYGTGSWPDGANINFMPI
469
Not Available
Not Available
01-10-1996
Evidence at protein level
| Amino Acid | Count | % Frequency | Amino Acid | Count | % Frequency |
|---|---|---|---|---|---|
| Alanine (A) | Leucine (L) | ||||
| Arginine (R) | Lysine (K) | ||||
| Asparagine (N) | Methionine (M) | ||||
| Aspartic Acid (D) | Phenylalanine (F) | ||||
| Cysteine (C) | Proline (P) | ||||
| Glutamine (Q) | Serine (S) | ||||
| Glutamic Acid (E) | Threonine (T) | ||||
| Glycine (G) | Tryptophan (W) | ||||
| Histidine (H) | Tyrosine (Y) | ||||
| Isoleucine (I) | Valine (V) |
| % Number of Residues in Helices | % Number of Residues in Strands | % Number of Residues in Coils |
|---|---|---|
Catalyzes the removal of terminal sialic acid residues from viral and cellular glycoconjugates. Cleaves off the terminal sialic acids on the glycosylated HA during virus budding to facilitate virus release. Additionally helps virus spread through the circulation by further removing sialic acids from the cell surface. These cleavages prevent self-aggregation and ensure the efficient spread of the progeny virus from cell to cell. Otherwise, infection would be limited to one round of replication. Described as a receptor-destroying enzyme because it cleaves a terminal sialic acid from the cellular receptors. May facilitate viral invasion of the upper airways by cleaving the sialic acid moities on the mucin of the airway epithelial cells. Likely to plays a role in the budding process through its association with lipid rafts during intracellular transport. May additionally display a raft-association independent effect on budding. Plays a role in the determination of host range restriction on replication and virulence. Sialidase activity in late endosome/lysosome traffic seems to enhance virus replication.
3.2.1.18
GO:0005975 ; GO:0016021 ; GO:0020002 ; GO:0046761 ; GO:0046872 ;
GO:0052794 ; GO:0052795 ; GO:0052796 ; GO:0055036
GO:0052794 ; GO:0052795 ; GO:0052796 ; GO:0055036
♦ Virion membrane . Host apical cell membrane
♦ Single-pass type II membrane protein . Note=Preferentially accumulates at the apical plasma membrane in infected polarized epithelial cells, which is the virus assembly site. Uses lipid rafts for cell surface transport and apical sorting. In the virion, forms a mushroom-shaped spike on the surface of the membrane. .
♦ Single-pass type II membrane protein . Note=Preferentially accumulates at the apical plasma membrane in infected polarized epithelial cells, which is the virus assembly site. Uses lipid rafts for cell surface transport and apical sorting. In the virion, forms a mushroom-shaped spike on the surface of the membrane. .
Not Available
Not Available
X-ray crystallography (11)
♦ACT_SITE 151 151 Proton donor/acceptor.
♦ ACT_SITE 406 406 Nucleophile.
♦ ACT_SITE 406 406 Nucleophile.
Protein couldn't be modeled using I-Tasser and Raptor X because of length constraints of the software.