Bioright Worldwide Company Limited

Yuen Wing Chow

Jun Wang

Yau Lung Siu

Yuk Sun Lui

Shiu Ming Cheng

This invention provides deacetoxycephalosporin C hydroxylase mutants, their encoding DNA sequences, the methods to utilize them and their application. The deacetoxycephalosporin C hydroxylase mutants are characterized by at least one amino acid mutation at residue position selected from Glycine at position 29, Alanine at position 40, Glycine at position 41, Arginine at position 182 and Threonine at position 272, based on the amino acid sequence shown in SEQ ID NO.:2 as reference sequence, and wherein the deacetoxycephalosporin C hydroxylase mutant has at least 10% increase in activity and at least 150% increase in thermostability compared to wild-type deacetoxycephalosporin C hydroxylase. The deacetoxycephalosporin C hydroxylase mutants in this invention have increased activity and thermostability, allowing them to be more commercially and industrially viable.

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Hong Kong, China

Yuen Wing Chow