Incorporation of a fluorous diazirine group into phosphatidylinositol 4,5-bisphosphate to illustrate its interaction with ADP-ribosylation factor 1
作者:Weigang Huang、Wei Sun、Zhiquan Song、Yanbao Yu、Xian Chen、Qisheng Zhang
DOI:10.1039/c2ob25276g
日期:——
Phosphatidylinositides are one family of the most versatile signaling molecules in cells, yet how they interact with different proteins to regulate biological processes is not well understood. Towards a general strategy to identify phosphatidylinositide–protein interactions, a fluorous diazirine group has been incorporated into phosphatidylinositol 4,5-bisphosphate (PIP2). The modified PIP2 was effectively cleaved by phospholipase C, one signaling protein that utilizes PIP2 as its endogenous substrate. Upon light illumination, the PIP2 probe effectively crosslinks with small GTPase ADP-ribosylation 1 to form a complex, suggesting that the probe might be suitable to identify PIP2-interacting proteins on the proteome level.
磷脂酰肌醇是细胞中用途最广的信号分子家族之一,但人们对它们如何与不同蛋白质相互作用以调节生物过程还不甚了解。为了找出磷脂酰肌醇与蛋白质相互作用的一般策略,我们在磷脂酰肌醇 4,5-二磷酸(PIP2)中加入了一个氟重氮基团。经修饰的 PIP2 被磷脂酶 C 有效地裂解,磷脂酶 C 是一种利用 PIP2 作为内源底物的信号蛋白。在光照下,PIP2探针能有效地与小GTP酶ADP-核糖基化1交联形成复合物,这表明该探针可能适合在蛋白质组水平上鉴定与PIP2相互作用的蛋白质。