MUTANT ?-GLUCOSIDASE, ENZYME COMPOSITION FOR DECOMPOSING BIOMASS, AND METHOD FOR PRODUCING SUGAR SOLUTION

摘要

Provided is a novel ß-glucosidase which can exhibit a high activity in the presence of a biomass and has high thermal stability to conventional enzymes. A ß-glucosidase characterized by being produced by substituting and/or deleting at least three amino acid residues selected from the group consisting of Glu39, Asp169, Arg170, Arg220, Tyr227 and Glu330 in the amino acid sequence for a parent ß-glucosidase by another amino acid residue, and exhibiting a cellobiose decomposition activity.