The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 2020
Filed:
Feb. 28, 2018
Jiangnan University, Wuxi, CN;
Tao Zhang, Wuxi, CN;
Bo Jiang, Wuxi, CN;
Hangyu Jiang, Wuxi, CN;
Wanmeng Mu, Wuxi, CN;
Ming Miao, Wuxi, CN;
Jiangnan University, Jiangsu, Wuxi, CN;
Abstract
An arginine deiminase mutant with improved enzyme activity and temperature stability and application thereof were provided, belonging to the technical field of genetic engineering and enzyme engineering. The arginine deiminase mutant is proline, namely Gly292 Pro, mutated from glycine near an enzyme active center. A wild-type arginine deiminase arcA coding gene is molecularly modified by a site-directed mutation technique to obtain a mutant enzyme ADIG292P, which has glycine at position 292 of an amino acid sequence of the wild type arginine deiminase mutated to proline. The arginine deiminase, modified by site-directed mutation, of the present invention has 1.5 times of increase in enzyme activity and 5.43 times of increase in half-life period at 40° C. compared with the wild-type enzyme, which solves the problems of low catalytic ability and temperature stability during the catalytic synthesis of citrulline using arginine deiminase, and lays a foundation for industrial production of efficient synthesis of citrulline and medication application.