Kinetic of improved production and carboxymethyl cellulose hydrolysis by an endo-glucanase from a derepressed mutant of Cellulomonas biazotea

The maximum product yield of endo-glucanase (650 IU g(-1) substrate) Cellulomonas biazotea mutant 51 Sm-r was 1.5- to 2.5-fold more than was produced by the wild type cells and was twice that reported by previous researchers. Mutation substantially improved the enthalpy (DeltaH*) and entropy of activation (DeltaS*) for product formation, turnover number, specificity constant activation energy, free energies for transition state formation and substrate binding for CMC hydrolysis respectively.