Activation of Hsp90 Enzymatic Activity and Conformational Dynamics through Rationally Designed Allosteric Ligands
作者:Sara Sattin、Jiahui Tao、Gerolamo Vettoretti、Elisabetta Moroni、Marzia Pennati、Alessia Lopergolo、Laura Morelli、Antonella Bugatti、Abbey Zuehlke、Mike Moses、Thomas Prince、Toshiki Kijima、Kristin Beebe、Marco Rusnati、Len Neckers、Nadia Zaffaroni、David A. Agard、Anna Bernardi、Giorgio Colombo
DOI:10.1002/chem.201502211
日期:2015.9.21
effects on Hsp90 ATPase and conformational dynamics, new ligands were developed that activate Hsp90 by targeting an allosteric site, located 65 Å from the active site. Specifically, analysis of protein responses to first‐generation activators was exploited to guide the design of novel derivatives with improved ability to stimulate ATP hydrolysis. The molecules’ effects on Hsp90 enzymatic, conformational
Hsp90 是对多种细胞途径至关重要的分子伴侣。ATP 调节的内部动力学对其功能至关重要,目前的药理学方法用 ATP 竞争性抑制剂阻断伴侣。在此,提出了一种通过设计新的变构配体来扰乱 Hsp90 的通用方法,旨在调节其功能动力学。基于第一组 2-苯基苯并呋喃对 Hsp90 ATP 酶和构象动力学具有刺激作用的表征,开发了新的配体,通过靶向距活性位点 65 Å 的变构位点来激活Hsp90。具体来说,利用对第一代激活剂的蛋白质反应的分析来指导新型衍生物的设计,以提高刺激 ATP 水解的能力。通过生物化学、生物物理和细胞方法表征了分子对 Hsp90 酶促、构象、共伴侣和客户结合特性的影响。这些设计的探针充当伴侣的变构激活剂,影响癌细胞系的生存能力,而 Hsp90 的正常功能对于癌细胞系来说是必需的。