FRET-Based Direct and Continuous Monitoring of Human Fucosyltransferases Activity: An Efficient synthesis of Versatile GDP-L-Fucose Derivatives from Abundantd-Galactose
作者:Takahiro Maeda、Shin-Ichiro Nishimura
DOI:10.1002/chem.200700760
日期:2008.1.7
acceptor substrate, sialyl-alpha2,3-LacNAc derivative (2) allowed us to carry out highly sensitive, direct, and continuous in vitro monitoring of the generation of sialyl Lewis X (SLe x), which is catalyzed by human alpha-1,3-fucosyltransferase VI (FUT-VI). A kinetic analysis revealed that compound 1 was an excellent donor substrate (KM=0.94 microM and Vmax=0.14 microM min(-1)) for detecting human FUT-VI
我们已经开发了一种简便且通用的协议,用于通过使用荧光能量共振转移(FRET)连续监测人岩藻糖基转移酶的活性,并探索了其在抑制剂筛选测定中的可行性。具有荧光探针的便捷糖核苷酸6-脱氧-6-N-(2-萘-2-基乙酰胺)-β-L-吡喃半乳糖-1-基鸟苷5'-二磷酸二钠盐(1),由天然丰富的D-吡喃半乳糖通过关键中间体6-叠氮化物-1,2,3,4-四-O-苯甲酰基-6-脱氧-β-L-吡喃半乳糖有效地合成(10)。结果表明,糖基供体1和丹磺化受体底物唾液酸-α2,3-LacNAc衍生物(2)的联合使用使我们能够对唾液酸化路易斯的产生进行高度敏感,直接和连续的体外监测X(SLe x),它由人α-1,3-岩藻糖基转移酶VI(FUT-VI)催化。动力学分析表明,化合物1是检测人FUT-VI活性的优良供体底物(KM = 0.94 microM和Vmax = 0.14 microM min(-1))。据我们所