Inhibitors | Comment | Organism | Structure |
---|---|---|---|
galactose | powerful inhibitor of alpha-Gal II, alpha-Gal III and alpha-Gal IV. 30% inhibition at 0.5 mM, nearly 100% inhibition at 40 mM | Aspergillus niger | |
mannose | 70% inhibition of alpha-Gal I at 40 mM | Aspergillus niger |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.22 | - |
p-nitrophenyl alpha-D-galactopyranoside | pH 4.5, 50°C, isoenzyme alpha-Gal II | Aspergillus niger | |
0.24 | - |
p-nitrophenyl alpha-D-galactopyranoside | pH 4.5, 50°C, isoenzyme alpha-Gal IV | Aspergillus niger | |
0.27 | - |
p-nitrophenyl alpha-D-galactopyranoside | pH 4.5, 50°C, isoenzyme alpha-Gal III | Aspergillus niger | |
0.39 | - |
melibiose | pH 4.5, 50°C, isoenzyme alpha-Gal II | Aspergillus niger | |
1 | - |
melibiose | pH 4.5, 50°C, isoenzyme alpha-Gal I | Aspergillus niger | |
1.4 | - |
p-nitrophenyl alpha-D-galactopyranoside | pH 4.5, 50°C, isoenzyme alpha-Gal I | Aspergillus niger |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
64000 | - |
2 * 64000, alpha-Gal I, alpha-Gal II and alpha-Gal III, SDS-PAGE | Aspergillus niger |
117000 | - |
alpha-Gal I, alpha-Gal II and alpha-Gal III, gel filtration | Aspergillus niger |
350000 | - |
alpha-Gal I, gel filtration | Aspergillus niger |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Aspergillus niger | - |
- |
- |
Purification (Comment) | Organism |
---|---|
multiple isoforms: alpha-Gal I, alpha-Gal II, alpha-Gal III, alpha-Gal IV | Aspergillus niger |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
culture filtrate | - |
Aspergillus niger | - |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
10.8 | - |
isoenzyme alpha-Gal III | Aspergillus niger |
11.52 | - |
isoenzyme alpha-Gal IV | Aspergillus niger |
21.95 | - |
isoenzyme alpha-Gal II | Aspergillus niger |
1080 | - |
isoenzyme alpha-Gal I | Aspergillus niger |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
melibiose + H2O | - |
Aspergillus niger | D-galactose + D-glucose | - |
? | |
p-nitrophenyl alpha-D-galactopyranoside + H2O | - |
Aspergillus niger | p-nitrophenol + alpha-D-galactose | - |
? | |
stachyose + 2 H2O | high activity with alpha-Gal I, low activity with alpha-Gal II | Aspergillus niger | 2 alpha-D-galactose + sucrose | - |
? |
Subunits | Comment | Organism |
---|---|---|
dimer | 2 * 64000, alpha-Gal I, alpha-Gal II and alpha-Gal III, SDS-PAGE | Aspergillus niger |
tetramer | 4 * 117000, SDS-PAGE | Aspergillus niger |
Organism | Comment | pI Value Maximum | pI Value |
---|---|---|---|
Aspergillus niger | isoelectric focusing, isoenzyme alpha-Gal I | - |
4.2 |
Aspergillus niger | isoelectric focusing, isoenzyme alpha-Gal II | - |
4.5 |
Aspergillus niger | isoelectric focusing, isoenzyme alpha-Gal III | - |
4.9 |
Aspergillus niger | isoelectric focusing, isoenzyme alpha-Gal IV | - |
4.9 |