首页 | 本学科首页   官方微博 | 高级检索  
     


Stabilization of proteases by entrapment in a new composite hydrogel
Authors:E. A. Markvicheva  N. E. Tkachuk  S. V. Kuptsova  T. N. Dugina  S. M. Strukova  Yu. E. Kirssh  V. P. Zubov  L. D. Rumish
Affiliation:(1) Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, ul. Miklukho-Maklaya 16/10, 117871 Moscow, Russia;(2) Moscow State University, Moscow, Russia;(3) Karpou Institute of Physical Chemistry, Moscow, Russia
Abstract:A new one-step procedure for entrapping proteases into a polymeric composite calcium alginate-poly(N-vinyl caproladam) hydrogel was developed that provided 75–90% retention of the activity of entrapped enzymes compared to soluble ones. Properties of entrapped carboxypeptidase B, trypsin, and thrombin were investigated. The immobilized enzymes were active within a wide pH range. The temperature optima of entrapped trypsin and carboxypeptidase B were approx 25°C higher than that of the soluble enzymes, and the resistance to heating was also increased. The effects of various polar and nonpolar organic solvents on the entrapped proteases were investigated. The immobilized enzymes retained their activity within a wide concentration range (up to 90%) of organic solvents. Gel-entrapped trypsin and carboxypeptidase (CPB) were successfully used for obtaining human insulin from recombinant proinsulin. The developed stabilization method can be used to catalyze various reactions proceeding within wide pH and temperature ranges.
Keywords:Poly(N-vinyl caproladam) hydrogel  thrombin  trypsin  carboxypeptidase B  enzyme entrapment  stabilization of proteases
本文献已被 SpringerLink 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