非水解的乌比基-异类异体作为二基化酶探针
Anitha Shanmugham1, Alexander Fish, Mark P A Luna-Vargas
1Division of Cell Biology and The Netherlands Proteomics Centre, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, The Netherlands.
Journal of the American Chemical Society
|June 15, 2010
概括
氧化物结合会产生稳定的乌比奎异体. 脱化酶表现出链接特异性,识别了氨酸残留附近的侧翼序列,用于向蛋白质调节.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 乌比基化是一种关键的翻译后修饰,调节蛋白质功能.
- 脱化酶 (DUBs) 逆转泛化,控制细胞过程.
- 了解DUB的特异性对于治疗开发至关重要.
研究的目的:
- 开发一种合成非水解性乌比奎异的方法.
- 为了研究二维化酶的链接特异性.
- 探索侧边序列在DUB基质识别中的作用.
主要方法:
- 氧化物结合用于合成乌比基-异类异体.
- 合成与K48和K63结合的乌比奎异体.
- 表面等离子共振光谱分析酶动力学和结合.
主要成果:
- 氧化物结合提供了一个有效的途径,以非水解可用的乌比奎异体.
- 脱化酶对K48和K63链接表现出特定的识别.
- 酶的选择性是由围绕着无处不在的氨酸残留物的局部序决定的.
结论:
- 非水解性乌比奎异体是研究乌比奎化的有价值的工具.
- 脱化酶的特异性依赖于链接类型和局部序列上下文.
- 这一策略使得可以详细研究DUB的基质识别机制.
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