EC Number |
Reaction |
Reference |
---|
3.2.1.39 | laminariheptaose + 3 H2O = laminaritriose + 2 laminaribiose |
AkLam36 mode of action, overview |
708222 |
3.2.1.39 | laminariheptaose + 3 H2O = laminaritriose + 2 laminaribiose |
D422, E499 and E503 are involved in catalysis.E499 is the catalytic base, F425 plays a major role in substrate binding possibly mediated by aromatic ring stacking with the sugar substrate |
-, 710465 |
3.2.1.39 | laminariheptaose + 3 H2O = laminaritriose + 2 laminaribiose |
Different from EC 3.2.1.6 endo-1,3(4)-beta-glucanase. Very limited action on mixed-link (1,3-1,4-)-beta-D-glucans. Hydrolyses laminarin, paramylon and pachyman |
- |
3.2.1.39 | laminariheptaose + 3 H2O = laminaritriose + 2 laminaribiose |
E94 reacts as nucleophile, E236 as proton donor |
666883 |
3.2.1.39 | laminariheptaose + 3 H2O = laminaritriose + 2 laminaribiose |
substrate binding structure and catalytic mechanism, overview |
731059 |
3.2.1.39 | laminariheptaose + 3 H2O = laminaritriose + 2 laminaribiose |
the enzyme is an endoglucanase that hydrolyzes beta-1,3-glucans as laminarin and yeast beta-1,3-1,6-glucan, but is inactive toward other polysaccharides, e.g. unbranched beta-1,3-glucans or mixed beta-1,3-1,4-glucan from cereals, or disaccharides. TLam has two ionizable groups involved in catalysis, and His, Tyr and Arg residues plus a divalent ion at the active site. A Cys residue important for TLam activity is exposed after laminarin binding. Residues E174, E179, H204, Y304, R127 and R181 at the active site of the enzyme are important for TLam activity |
708732 |