德尔特克斯和RING-UIM E3结合酶合作,在坦基拉斯上创建一个全方位-ADP-ribose混合标记,促进其稳定
Jerome Perrard1, Kevin Gao1, Katherine Ring1
1Department of Cell Biology, New York University School of Medicine, New York, NY 10016, USA.
Science advances
|September 3, 2025
概括
在单-ADP-ribose (MAR) 上,Deltex E3结合酶 (DTX2,DTX3) 产生混合标记. 这通过防止多ADP- 核糖 (PAR) 的形成和降解来稳定酶.
科学领域:
- 生物化学
- 分子生物学
- 细胞信号传输
背景情况:
- ADP-ribosylation存在于单-ADP-ribose (MAR) 或多-ADP-ribose (PAR) 的形式.
- 坦基酶是一种PAR转移酶,通过RNF146对蛋白质进行降解,这一过程被RNF114和RNF166抵消.
研究的目的:
- 确定调节坦基拉斯中MAR和PAR之间的平衡机制.
- 阐明E3链酶如何控制坦基拉斯的稳定性和降解.
主要方法:
- 细胞测定用于研究无处不在和ADP-ribosylation.
- 确定E3连接酶及其基质.
- 新杂交后翻译修饰的特征.
主要成果:
- 德尔特斯E3链酶 (DTX2,DTX3) 在MAR上催化坦基拉斯的单双化,形成单双-MAR杂交标记.
- RNF114和RNF166识别了这种混合标记,并对其进行分离.
- 这种无处不在可以防止PAR的形成,对抗RNF146并稳定坦基酶.
结论:
- 一个涉及MAR在tankyrase上无处不在的新机制调节了它的稳定性.
- 在细胞信号传递和蛋白质平衡中,Ubiquitin,ADP-ribose和E3结合酶之间的这种相互作用至关重要.
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