Structural Characterization of Gbetagamma-Phospholipase C complexes

项目总结 阿片类药物危机、心血管疾病和癌症是#年最紧迫的医疗危机。 美国。PLCβ酶对正常的止痛药、心血管和 增殖信号。此外，PLCβ与其G蛋白之间相互作用的中断 激动剂已被证明可以改善阿片类药物诱导的临床前模型的结果 止痛、心脏肥大和癌症。然而，专门针对这些交互的是 在没有反映构象差异的结构数据的情况下，几乎是不可能的 在非激活、激活和G蛋白结合的PLCβ状态之间。这个项目的目标是 从结构和分子水平了解G-β和/或膜激活PLC-βγ的机制 功能研究。Gβγ在PLCβ上的结合位点尚未确定，总体而言，Gβγ- 对效应酶的依赖调节是一个知之甚少的过程。这个项目不会 只有提高我们对β信号在膜上和结合上的整体理解 Gβγ，但也将提供对作用于 膜界面。这项研究的完成将协同地增加我们对 可编程控制器β激活机制，提供了可用于开发 针对G蛋白-PLCβ相互作用的探针，并最终提供潜在的治疗方法。

PROJECT SUMMARY The opioid crisis, cardiovascular disease, and cancer are the most pressing healthcare crises in the United States. PLCβ enzymes are essential for normal analgesic, cardiovascular, and proliferative signaling. Further, disruption of interactions between PLCβ and its G protein activators have been shown to improve outcomes in preclinical models of opioid induced analgesia, cardiac hypertrophy, and cancer. However, targeting these interactions specifically is nearly impossible in the absence of structural data that informs on the conformational differences between inactive, active, and G protein bound PLCβ states. The goal of this project is to understand mechanisms of PLCβ activation by Gβγ and/or the membrane through structural and functional studies. The Gβγ binding site on PLCβ has yet to be defined, and overall, Gβγ- dependent regulation of effector enzymes is a poorly understood process. This project would not only increase our overall understanding of PLCβ signaling at the membrane and in conjunction with Gβγ but would also provide insights into the regulation of other enzymes that act at the membrane interface. The completion of this study will synergistically increase our understanding of PLCβ activation mechanisms, providing insights that can be leveraged for the development of probes, and ultimately potential therapeutics, targeting G protein–PLCβ interactions.