1. Computational Design and Crystal Structure of a Highly Efficient Benzoylecgonine Hydrolase
- Author
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Weixuan Yao, Jiye Wang, Kang Yang, Junseng Tong, Yanan Wu, Yun Zhang, Xiabin Chen, Qiang Li, Xingyu Deng, Tian Xie, Shurong Hou, and Jianzhuang Yao
- Subjects
chemistry.chemical_classification ,Models, Molecular ,Chromatography ,Cocaine Esterase ,Molecular Structure ,Hydrolases ,Metabolite ,General Chemistry ,General Medicine ,Catalysis ,chemistry.chemical_compound ,Enzyme ,chemistry ,Cocaine ,Toxicity ,Hydrolase ,Benzoylecgonine ,Ecgonine ,Benzoic acid - Abstract
Benzoylecgonine (BZE) is the major toxic metabolite of cocaine and is responsible for the long-term cocaine-induced toxicity owing to its long residence time in humans. BZE is also the main contaminant following cocaine consumption. Here, we identified the bacterial cocaine esterase (CocE) as a BZE-metabolizing enzyme (BZEase), which can degrade BZE into biological inactive metabolites (ecgonine and benzoic acid). CocE was redesigned by a reactant-state-based enzyme design theory. An encouraging mutant denoted as BZEase2, presented a >400-fold improved catalytic efficiency against BZE compared with wild-type (WT) CocE. In vivo, a single dose of BZEase2 (1 mg kg-1 , IV) could eliminate nearly all BZE within only two minutes, suggesting the enzyme has the potential for cocaine overdose treatment and BZE elimination in the environment by accelerating BZE clearance. The crystal structure of a designed BZEase was also determined.
- Published
- 2021