Maltooligosyl Trehalose Synthase Mutant and its Application

A gene, wherein the gene encodes a maltooligosyl trehalose synthase mutant consisting of a mutation compared with the amino acid sequence of a wild-type maltooligosyl trehalose synthase from Sulfolobus acidocaldarius, the mutation being selected from a group consisting of:

• a substitution at position 81, a substitution at position 263, a substitution at position 432, a substitution at position 439, a substitution at position 583, a substitution at position 585, a substitution at position 586, a substitution at position 611, a substitution at position 615, and combinations thereof;
• wherein a parent amino acid sequence of the wild-type maltooligosyl trehalose synthase is set forth in SEQ ID NO:
• 1;
• wherein the maltooligosyl trehalose synthase mutant has enzymatic activity more than the wild-type maltooligosyl trehalose synthase.