UDP-N-trifluoroacetylglucosamine as an alternative substrate in N-acetylglucosaminyltransferase reactions
作者:Rafael F. Sala、Shawna L. MacKinnon、Monica M. Palcic、Martin E. Tanner
DOI:10.1016/s0008-6215(97)10033-7
日期:1998.1
The synthesis of UDP-N-trifluoroacetylglucosamine [uridine 5'-(2-trifluoroacetamido-2-deoxy-alpha-D-glucopyranosyl diphosphate, UDP-GlcNAc-F3] is reported. The compound is found to serve as a substrate for the core-2 GlcNAc transferase (EC 2.4.1.102) that is involved in the biosynthesis of O-linked glycoproteins and for the GlcNAcT-V transferase (EC 2.4.1.155) that is a key biosynthetic enzyme controlling
6)-使用GlcNAcT-V转移酶的β-D-Glcp-OR[R =(CH 2)7 CH 3]。在温和的碱性条件下除去三氟乙酰基,得到相应的含葡糖胺的四糖。这些实施例证明了使用GlcNAc特异性转移酶将掩蔽形式的葡糖胺残基引入寡糖的可行性。对于三氟乙酰氨基基团作为特定识别元件的要求在以下观察中显而易见:UDP-葡萄糖胺和UDP-葡萄糖均不能充当core-2 GlcNAc转移酶的供体底物。这些实施例证实了使用GlcNAc特异性转移酶将掩蔽形式的葡糖胺残基引入寡糖的可行性。对于三氟乙酰氨基基团作为特定识别元件的要求在以下观察中显而易见:UDP-葡萄糖胺和UDP-葡萄糖均不能充当core-2 GlcNAc转移酶的供体底物。这些实施例证明了使用GlcNAc特异性转移酶将掩蔽形式的葡糖胺残基引入寡糖的可行性。对于三氟乙酰氨基基团作为特定识别元件的要求在以下观察中显而易见:UDP-葡萄糖胺和UDP-葡萄糖均不能充当core-2