详细信息
PEG修饰青霉素酰化酶及其在两水相生物转化体系中的分配
PEG-modified Penicillin Acylase and Its Partitioning in Aqueous Two-phase Bioconversion System
文献类型:期刊文献
中文题名:PEG修饰青霉素酰化酶及其在两水相生物转化体系中的分配
英文题名:PEG-modified Penicillin Acylase and Its Partitioning in Aqueous Two-phase Bioconversion System
作者:何汉平[1];刘叶青[1];曹学君[1];张秀萍[1]
机构:[1]华东理工大学生物反应器工程国家重点实验室,生物工程学院上海200237
年份:2001
卷号:27
期号:1
起止页码:109
中文期刊名:华东理工大学学报(自然科学版)
外文期刊名:Journal of East China University of Science and Technology
收录:CSTPCD;;Scopus;北大核心:【北大核心2000】;CSCD:【CSCD2011_2012】;
基金:国家自然科学基金!资助项目 (2 98730 14 )
语种:中文
中文关键词:对甲苯磺酰氯;修饰酶;两水相体系;聚乙二醇;青霉素酰化酶;化学修饰;分配系数
外文关键词:tosyl chloride; modified penicillin acylase; aqueous two phase system
摘要:采用对甲苯磺酰氯法 ,用聚乙二醇对青霉素酰化酶进行化学修饰 ,修饰酶的比活为未修饰酶的 75% ,稳定性比游离酶有了很大提高。酶在带修饰酶的聚乙二醇与葡聚糖组成的两水相体系中的分配系数为 2 5。
Polyethyleneglycol (PEG) activated by tosyl chloride was used to modify penicillin acylase (PAC). The stability of the PEG PAC was much better than the free PAC. The activity of the modified enzyme was 75% of free enzyme. The partition of PEG PAC in aqueous two phase system was investigated. The modified penicillin acylase was mainly present in the PEG phase in a PEG dextran aqueous two phase system, and the partition coefficient was 25.
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