作者:Andrew M. Riley、Judith E. Unterlass、Vera Konieczny、Colin W. Taylor、Thomas Helleday、Barry V. L. Potter
DOI:10.1039/c8md00149a
日期:——
(diphosphate) groups. Converting a phosphate group in an InsP into a diphosphate has been reported to enhance affinity for some binding proteins. We synthesised 1-PP-Ins(4,5)P2, the first diphosphate analogue of the intracellular signalling molecule InsP3, and examined its effects on InsP3 receptors, which are intracellular Ca2+ channels. 1-PP-Ins(4,5)P2 was indistinguishable from InsP3 in its ability
二磷酸肌醇磷酸盐 (PP-InsPs) 是含有 PP(二磷酸盐)基团的肌醇磷酸盐 (InsPs)。据报道,将 InsP 中的磷酸基团转化为二磷酸基团可以增强对某些结合蛋白的亲和力。我们合成了 1-PP-Ins(4,5)P 2 ,这是细胞内信号分子 InsP 3的第一个二磷酸类似物,并检查了其对 InsP 3受体(细胞内 Ca 2+通道)的影响。1-PP-Ins(4,5)P 2在结合和激活 1 型 InsP 3 受体的能力方面与InsP 3没有区别,这表明 InsP 3的二磷酸修饰既不影响亲和力也不影响功效。尽管如此,1-PP-Ins(4,5)P 2是迄今为止已确定的最有效的 InsP 3 1-磷酸修饰类似物。PP-InsP 通常被二磷酸肌醇多磷酸磷酸水解酶 (DIPP) 水解,但 1-PP-Ins(4,5)P 2不易被人 DIPP 代谢。差示扫描荧光测定显示1-PP-Ins(4,5)P 2