Activating Compound | Comment | Organism | Structure |
---|---|---|---|
additional information | not inhibitory or activating: Mg2+, Mn2+, Ca2+, K+, EDTA, EGTA, or 1.0 M NaCl | Saccharophagus degradans |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
Cu2+ | 10 mM, 41% loss of activity | Saccharophagus degradans | |
Hg2+ | 10 mM, complete loss of activity | Saccharophagus degradans | |
additional information | not inhibitory or activating: Mg2+, Mn2+, Ca2+, K+, EDTA, EGTA, or 1.0 M NaCl | Saccharophagus degradans | |
Ni2+ | 10 mM, 36% loss of activity | Saccharophagus degradans |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Saccharophagus degradans | Q7PC53 | - |
- |
Saccharophagus degradans DSM 17024 | Q7PC53 | - |
- |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
5900 | - |
substrate 4'-methylumbelliferyl-N,N',N''-triacetylchitobiose, aminoterminal catalytic domain, pH 7.5, 30°C | Saccharophagus degradans |
80000 | - |
substrate 4'-methylumbelliferyl-N,N'-diacetylchitobiose, aminoterminal catalytic domain, pH 7.5, 30°C | Saccharophagus degradans |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
4-methylumbelliferyl beta-N,N',N''-triacetylchitotrioside + H2O | - |
Saccharophagus degradans | methylumbelliferone + N,N',N''-triacetylchitotriose | - |
? | |
4-methylumbelliferyl beta-N,N',N''-triacetylchitotrioside + H2O | - |
Saccharophagus degradans DSM 17024 | methylumbelliferone + N,N',N''-triacetylchitotriose | - |
? | |
4-methylumbelliferyl N,N'-diacetylchitobioside + H2O | - |
Saccharophagus degradans | methylumbelliferone + N,N'-diacetylchitobiose | - |
? | |
4-methylumbelliferyl N,N'-diacetylchitobioside + H2O | - |
Saccharophagus degradans DSM 17024 | methylumbelliferone + N,N'-diacetylchitobiose | - |
? | |
N,N',N'',N''',N'''',N'''''-hexaacetylchitohexaose + H2O | - |
Saccharophagus degradans | N,N'-diacetylchitobiose + N,N',N'',N'''-tetraacetylchitotetraose | - |
? | |
N,N',N'',N''',N'''',N'''''-hexaacetylchitohexaose + H2O | - |
Saccharophagus degradans DSM 17024 | N,N'-diacetylchitobiose + N,N',N'',N'''-tetraacetylchitotetraose | - |
? | |
N,N',N'',N'''-tetraacetylchitotetraose + H2O | - |
Saccharophagus degradans | 2 N,N'-diacetylchitobiose | sole product | ? | |
N,N',N'',N'''-tetraacetylchitotetraose + H2O | - |
Saccharophagus degradans DSM 17024 | 2 N,N'-diacetylchitobiose | sole product | ? |
Synonyms | Comment | Organism |
---|---|---|
chitinase B | - |
Saccharophagus degradans |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
37 | - |
- |
Saccharophagus degradans |
Temperature Minimum [°C] | Temperature Maximum [°C] | Comment | Organism |
---|---|---|---|
30 | - |
80% of maximum activity | Saccharophagus degradans |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7.2 | 8 | - |
Saccharophagus degradans |
General Information | Comment | Organism |
---|---|---|
physiological function | chitinase B is predicted to contain two glycoside hydrolase family 18 (GH18) catalytic domains, both of which are catalytically active against chitin. The aminoterminal catalytic domain (GH18N) releases methylumbelliferone from 4'-methylumbelliferyl-N,N'-diacetylchitobiose and releases chitobiose from the nonreducing end of chitooligosaccharides. The C-terminal domain shows endochitinolytic activity. The domains function cooperatively to degrade chitin | Saccharophagus degradans |