合成二极体ADP-ribose及其结构与人类的多分子ADP-ribose) 糖酶
Michael J Lambrecht1, Matthew Brichacek1, Eva Barkauskaite2
1†Department of Chemistry, Roger Adams Laboratory, University of Illinois, 600 South Mathews, Urbana, Illinois 61801, United States.
Journal of the American Chemical Society
|February 24, 2015
概括
在结构研究中,化学合成的ADP-核糖二聚体提供同质的多ADP-核糖 (PAR). 这一突破使人类PARG的第一个共晶结构成为可能,进步了我们对细胞过程中PAR蛋白相互作用的理解.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 化学合成 化学合成
背景情况:
- 聚ADP-ribosyl) 化 (PAR) 是一种关键的翻译后修饰,涉及DNA修复,染色体调节,转录和亡.
- 获得同质的多ADP-ribose (PAR) 具有挑战性,阻碍了对其与多ADP-ribose (PARG) 糖酶 (PARG) 等蛋白质相互作用的研究.
研究的目的:
- 用于化学合成同质的ADP-ribose二次体和相关的PAR片段.
- 确定第一个人类PARG基质酶共晶结构.
- 开发用于生物化学测试的新型PAR探针.
主要方法:
- 化学合成ADP-ribose二聚体和基化二聚体.
- 人类PARG与ADP-ribose二聚体的联合结晶.
- 生物和光标记的 PAR 探针的合成.
- 基于光偏振的结合试验.
- 评估合成的PAR片段作为PARG基质.
主要成果:
- 成功合成ADP-ribose二元体的化学合成,使得同质基质的分离成为可能.
- 确定第一个人类PARG基质酶共晶结构的确定.
- 开发用于结合测定的标记PAR探针.
- 识别PARG基质识别和裂变的最小特征.
结论:
- 化学合成为同质PAR及其类似物提供了替代途径.
- 共同晶体结构提供了对PARG基底相互作用的洞察力.
- 新型的PAR探针有助于对PAR蛋白相互作用进行生化研究.
- 了解PAR代谢对于各种细胞过程至关重要.
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