Acceptor-substrate recognition by N-acetyl-glucosaminyltransferase-V: Role of the mannose residue in βDGlcNAc(1→2)αDMan(1→6)βDGlcOR
作者:Shaheer H. Khan、Jens Ø. Duus、Suzanne C. Crawley、Monica M. Palcic、Ole Hindsgaul
DOI:10.1016/s0957-4166(00)80389-4
日期:1994.12
βGlcNAc(1→2)αMan(1→6)βGlc-O(CH2)7CH3 (4) is an acceptor specific for N-acetylglucosaminyltransferase-V (GlcNAcT-V), a branching enzyme controlling the biosynthesis of cell-surface Asn-linked oligosaccharides. Three analogs of 4, where the central mannose residue has been O-methylated at O-3, at O-6, and where the 6-OH group was replaced by fluorine, were chemically synthesized, characterized by NMR-spectroscopy
βGlcNAc(1→2)αMan(1→6)βGlc-O(CH 2)7 CH 3(4)是对N-乙酰氨基葡萄糖基转移酶-V(GlcNAcT-V)特有的受体,该分支酶控制细胞的生物合成。表面Asn连接的寡糖。化学合成了4的三个类似物,其中中心甘露糖残基在O-3处被O-甲基化,在O-6处被氟取代了6-OH基团,通过NMR光谱进行了表征,并进行了动力学评估GlcNAcT-V的底物。连同使用先前描述的4的导数获得的结果得出的结论是,Man残基上的OH基团都不对酶的识别至关重要。这些结果应简化这种重要的肿瘤相关酶抑制剂的设计。