The specificity and kinetic properties of trypsin ethylated at the binding site

FEBS Letters

Ben Avraham, Ruth¹  Shalitin, Yechiel¹ 

[1] Department of Biology, Technion-Israel Institute of Technology, Haifa 32000, Israel

关键词: Trypsin;    Specificity;    Binding site;    Ethylation;    Hydrophobic ligand;   

DOI  :  10.1016/0014-5793(85)81078-4

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Treatment of trypsin with triethyloxonium tetrafluoroborate at pH 8, 25 °C, results in abolition of binding to the enzyme of specific cationic substrates and inhibitors. The binding constant of soybean trypsin inhibitor to ethylated trypsin is 10000-fold smaller than to intact trypsin. However, the intrinsic ability of trypsin to recognize and react with nonspecific neutral substrates and inhibitors is not lost, and in several cases even considerably enhanced. Thus ethylated trypsin (Tret) resembles chymotrypsin in its behavior. Trypsin-like enzymes are also affected in a similar manner.

【 授权许可】

Unknown