CNKI《中国期刊全文数据库》收录期刊
《中国核心期刊(遴选)数据库》收录期刊
《中文科技期刊数据库》收录期刊

Progress on the catalytic mechanism of amidas

Expand
  • College of Biotechnology and Bioengineering,Zhejiang University of Technology,Hangzhou 310014,China

Abstract

Amidases are a class of hydrolases,which catalyze the hydrolysis of C—N bonds ofvarious amides to the corresponding carboxylic acids and ammonia.They are ubiquitous in many   different types of organisms.According to their amino acid sequences,amidases can be assigned   into nitrilase superfamily and amidase signature family.Here,we systematically review the   progress of study in molecular structures and catalytic mechanisms of amidases,as well as the   specific catalytic processes of specific amidases.All members of the nitrilase superfamily possess   the conserved catalytic triad Cys-Lys-Glu,and exhibit similar catalytic processes.The residue   Cys is responsible for the nucleophilic attack,Glu acts as a general base,while Lys is involved in   the stabilization of the transition states.As for amidase signature family,the conserved catalytic   triad is Ser-cisSer-Lys,and the catalytic processes vary from different signature amidases.   According to the role of Lys,the catalytic mechanism can be divided into two types:general acid
catalysis and general base catalysis.

Cite this article

JIN Jianqiang,WU Zheming,ZHENG Renchao . Progress on the catalytic mechanism of amidas[J]. Bulletin of Fermentation Science and Technology, 2017 , 46(3) : 170 -177 . DOI: 10.16774/j.cnki.issn.1674-2214.2017.03.009

Outlines

/