通过模仿自然蛋白质-蛋白质相互作用来开发α螺旋式calpain探针
Hyunil Jo1, Nataline Meinhardt, Yibing Wu
1Department of Pharmacology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
Journal of the American Chemical Society
|September 25, 2012
概括
研究人员开发了一种新的方法来稳定中的α螺旋体,创造出一种强大的calpain抑制剂. 这种技术还使得基于活动的探针可以用于研究calpain家族蛋白酶.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 化学生物学 化学生物学
背景情况:
- 卡尔帕因是参与各种细胞过程的囊蛋白酶.
- 卡尔帕斯塔丁是卡尔帕因的内源性抑制剂,但它本质上是不稳定的.
- 模仿蛋白质-蛋白质相互作用是设计酶抑制剂的一种策略.
研究的目的:
- 通过稳定calpastatin的一个关键结构动机来设计一种高度特异的calpain抑制剂.
- 开发一种使用交叉链接稳定酸中的α螺旋体的一般方法.
- 创建基于活动的探针来研究calpain家族蛋白酶.
主要方法:
- 选24个交叉链接器进行囊醇化以稳定类α螺旋体.
- 循环二元化 (CD) 和核磁共振 (NMR) 谱学以评估α-状性.
- 基于calpastatin的α-螺旋式calpain抑制剂和基于活动的探针的设计和合成.
主要成果:
- 结构刚性的交叉连接器有效地稳定了模型中的α螺旋.
- 一个基于calpastatin的稳定双回合α螺旋产生了强效和选择性的calpain抑制剂.
- 开发了不可逆转的基于活动的探针,保留了螺旋式抑制剂的特异性.
结论:
- 一种新的交叉链路策略可以使胺α螺旋的稳定.
- 这种方法为calpain研究提供了强效和选择性的calpain抑制剂和基于活动的探针.
- 交叉链接技术在研究其他蛋白质与蛋白质相互作用方面具有更广泛的应用.
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