Organism | UniProt | Comment | Textmining |
---|---|---|---|
Serratia marcescens | Q54276 | - |
- |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
chitosan + H2O | - |
Serratia marcescens | ? | 65% acetylated chitosan, enzyme shows a processive mode of action, moving the sugar chain two residues at a time and almost exclusively yielding oligomers with even-numbered chain lengths | ? | |
additional information | ChiB is an exoenzyme which degrades the polymer chains from their nonreducing ends. The degradation of chitosan with 65% acetylated units showed biphasic kinetics: the faster phase is dominated by cleavage on the reducing side of two acetylated units (occupying subsites -2 and -1), while the slower kinetic phase reflects cleavage on the reducing side of a deacetylated and an acetylated unit (bound to subsites -2 and -1, respectively). The enzyme does not show preferences with respect to acetylation of the sugar bound in the +1 subsite. Even chitosans with low degrees of acetylation can be degraded by ChiB | Serratia marcescens | ? | - |
? |
Synonyms | Comment | Organism |
---|---|---|
ChiB | - |
Serratia marcescens |