The use of glycosides of 6- and 8-acylamino-4-methylumbelliferone in studies of the specificity and properties of human lysosomal glycolipid hydrolases
作者:German Ya. Wiederschain、Inna K. Kozlova、Galina S. Ilyina、Margarita A. Mikhaylova、Elena M. Beyer
DOI:10.1016/0008-6215(92)84111-5
日期:1992.2
A series of 6- and 8-acylamino-4-methylumbelliferyl beta-D-galactopyranosides, beta-D-glucopyranosides, and alpha-L-fucopyranosides having various fatty acid residues were synthesized; 6-(9) and 8-hexadecanoylamino-4-methylumbelliferyl beta-D-galactopyranoside (10) were shown to be substrates for human galactocerebrosidase. Analogs of 9 with shorter acyl residues (octanoyl and butanoyl) were substrates
合成了一系列具有各种脂肪酸残基的6-和8-酰基氨基-4-甲基伞形酮基β-D-吡喃半乳糖苷,β-D-吡喃葡糖苷和α-L-呋喃果糖苷;6-(9)和8-十六烷酰基氨基-4-甲基伞形酮基β-D-吡喃半乳糖苷(10)被证明是人半乳糖脑苷脂酶的底物。具有较短酰基残基(辛酰基和丁酰基)的9的类似物是另一种β-D-半乳糖苷酶(即GM1-神经节苷脂-β-D-半乳糖苷酶)的底物。各种β-D-半乳糖苷酶对合成的D-半乳糖吡喃糖苷的长度和位置不同的特异性,已用两种糖脂病,克拉布氏病(半乳糖脑苷脂酶缺乏症)和GM1-β-半乳糖苷酶患者的酶制剂进行了测试不足),提示9是半乳糖脑苷脂酶在Krabbe病生化检测中的特异性底物。与生色的2-十六烷酰基氨基-4-硝基苯基β-D-葡萄糖吡喃糖苷相比,人和动物葡糖脑苷脂酶均不易产生荧光的6-辛酰基-和6-十六烷酰基-氨基-4-甲基伞形糖基β-D-吡喃葡萄糖苷。通过多种形式的人α-