KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.16 | - |
2-(4-methylumbelliferyl)-alpha-D-N-acetylneuraminic acid | pH 5.2 | influenza A virus | |
0.18 | - |
alpha-(2-3)-sialyllactose | pH 5.2 | influenza A virus | |
0.52 | - |
alpha-(2-6)-sialyllactose | pH 5.2 | influenza A virus |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Ca2+ | activates | influenza A virus |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
200000 | 240000 | - |
influenza A virus |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
bovine brain gangliosides + H2O | influenza A virus | - |
sialic acid + ? | - |
? | |
bovine submaxillary gland mucin + H2O | influenza A virus | - |
sialic acid + ? | - |
? | |
colominic acid + H2O | influenza A virus | - |
sialic acid + ? | - |
? | |
fetuin + H2O | influenza A virus | - |
sialic acid + ? | - |
? | |
orosomucoid + H2O | influenza A virus | - |
sialic acid + ? | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
influenza A virus | - |
H3N2, strain X-31, reassorting of influenza A/Victoria/3/75 and influenza A/PR/8/34, from inoculated chicken egg allantoic fluid | - |
Purification (Comment) | Organism |
---|---|
from inoculated chicken egg allantoic fluid, by ultracentrifugation, gel filtration and proteolytic treatment with pronase, soluble 'head' part of the enzyme complex | influenza A virus |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
0.15 | - |
purified enzyme, substrate alpha-(2-6)-sialyllactose | influenza A virus |
2.13 | - |
purified enzyme, substrate alpha-(2-3)-sialyllactose | influenza A virus |
11.58 | - |
purified enzyme, substrate 2-(4-methylumbelliferyl)-alpha-D-N-acetylneuraminic acid | influenza A virus |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
2-(4-methylumbelliferyl)-alpha-D-N-acetylneuraminic acid + H2O | - |
influenza A virus | 4-methylumbelliferol + alpha-D-N-acetylneuraminic acid | - |
? | |
alpha(2-3)-sialyllactose + H2O | preference for alpha(2-3)-linkages | influenza A virus | sialic acid + lactose | - |
? | |
alpha(2-6)-sialyllactose + H2O | - |
influenza A virus | sialic acid + lactose | - |
? | |
bovine brain gangliosides + H2O | - |
influenza A virus | sialic acid + ? | - |
? | |
bovine submaxillary gland mucin + H2O | - |
influenza A virus | sialic acid + ? | - |
? | |
Candida albicans cells + H2O | - |
influenza A virus | desialylated Candida albicans cells + sialic acid | - |
? | |
colominic acid + H2O | - |
influenza A virus | sialic acid + ? | - |
? | |
fetuin + H2O | - |
influenza A virus | sialic acid + ? | - |
? | |
additional information | enzyme agglutinates erythrocytes from human blood | influenza A virus | ? | - |
? | |
orosomucoid + H2O | - |
influenza A virus | sialic acid + ? | - |
? |
Subunits | Comment | Organism |
---|---|---|
More | enzyme possesses 2 distinct regions, a globular one, exposed to the exterior, and a stem portion, part of which is inserted into the virion envelope | influenza A virus |
Synonyms | Comment | Organism |
---|---|---|
NA | - |
influenza A virus |
neuraminidase | - |
influenza A virus |
sialidase | - |
influenza A virus |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
37 | - |
assay at | influenza A virus |
Temperature Stability Minimum [°C] | Temperature Stability Maximum [°C] | Comment | Organism |
---|---|---|---|
56 | - |
inactivation | influenza A virus |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
4.4 | - |
with substrate alpha-(2-6)-sialyllactose | influenza A virus |
pH Minimum | pH Maximum | Comment | Organism |
---|---|---|---|
4 | 6.8 | - |
influenza A virus |