Strong competitive inhibition of porcine pancreaticalpha-amylase by aminodeoxy derivatives of maltose and maltotriose
作者:Jochen Lehmann、Markus Schmidt-Schuchardt、Jürgen Steck
DOI:10.1016/s0008-6215(92)84241-j
日期:1992.12
The syntheses are described of 6-amino-6-deoxymaltose (2), the 6-amino-6-deoxy (4), 6'-amino-6'-deoxy (6), and 6''-amino-6''-deoxy (8) derivatives of maltotriose, and the methyl alpha- (10) and beta-glycoside (12) and the 1-deoxy derivative (16) of 4. The K(i) values (muM) of these competitive inhibitors of porcine pancreatic alpha-amylase were: 2, 88; 4, 1.9; 6, 2.0; 8, 175; 10, 360; 12, 9000; 16, 7600 (cf. 1800 for maltotriose and 3000 for methyl alpha-maltotrioside). The low values for 4 and 6 reflect reinforcement of the normal binding by ionic attraction and possibly, interaction of the reducing end groups with the protein.