首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Enzymatic synthesis of p-nitrophenyl 35-O-β-N-acetylglucosaminyl|-α-maltopentaoside by lysozyme; a novel substrate for human amylase assay
Authors:Hidenori Matsui  Hirokazu Kawagishi  Taichi Usui
Institution:Department of Applied Biochemistry, Faculty of Agriculture, Shizuoka University, Shizuoka Japan
Abstract:Transglycosylation from di-N-acetylchitobiose to the 3-position at the nonreducing end glucosyl group of p-nitrophenyl α-maltopentaoside was regioselectively induced through the use of hen egg-white lysozome. The enzyme formed p-nitrophenyl 35-O-β-N-acetylglucosaminyl-α-maltopentaoside (5% of the enzyme-catalyzed net decreased of p-nitrophenyl α-maltopentaoside) from di-N-acetylchitobiose as a donor and p-nitrophenyl α-maltopentaoside as an acceptor. The rate of the transglycosylation depended on the concentration of substrate, the temperature and the pH. The hydrolytic actions of human pancreatic and salivary α-amylase on this derivative were examined. The maltopentaoside derivative was shown to be useful as a substrate for α-amylase assay through a coupled reaction involving α-D-glucosidase and glucoamylase.
Keywords:Enzymatic transglycosylation  Amylase assay  NG5P  GIP  G2P  G3P  G5P  TPS  3-(trimethylsilyl)propanesulfonate sodium salt
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号