相关实验视频
Updated: Jul 10, 2025

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In Vitro Analysis of E3 Ubiquitin Ligase Function
Published on: May 14, 2021
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在核酸上DELTEX E3酶无处不在ADP-ribosyl修饰ADP-ribosyl修饰
Kang Zhu1, Marcin J Suskiewicz2, Chatrin Chatrin1
1Sir William Dunn School of Pathology, University of Oxford, Oxford, UK.
Nucleic acids research
|November 24, 2023
概括
德尔特克斯家族的E3酶通常在任何地方都存在着腺二酸盐核糖酶 (ADPr). 这项研究表明,它们可以无处不在地化ADP-ribosylated核酸,这是通过特定的酶可逆的过程.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 泛基化传统上针对蛋白质,但非蛋白质基质,如腺二酸核糖 (ADPr) 越来越被认可.
- 之前的研究已经确定了DTX2 E3结合酶在ADPR中无处不在的能力.
研究的目的:
- 调查其他DELTEX家族成员,特别是DTX3L是否也表现出ADPR无处不在活性.
- 探索DELTEX E3链酶是否可以无处不在ADP-ribosylated核酸.
- 为了确定能够逆转这种新型无处不在修饰的酶.
主要方法:
- 使用分离的催化碎片和全长PARP9:DTX3L复合物的生物化学分析.
- 通过多 (ADP-ribose) 聚合酶 (PARP) 合成的ADP-ribosylatedDNA和RNA的无处不在的分析.
- 酶分析以确定逆转Ub-ADPr-核酸结合物的酸酶.
主要成果:
- 与DTX2一样,DTX3L表现出ADPR无处不在的活性,表明DELTEX家族的一般功能.
- DTX2和DTX3L成功地使ADP-ribosylatedDNA和RNA无处不在.
- 结合体修饰被水解酶逆转,包括SARS-CoV-2 Mac1,PARP14 巨 1,以及SARS-CoV-2 PLpro.
结论:
- ADPr无处不在是DELTEX E3结合酶家族中的一个保存函数.
- 这项研究确立了ADP-ribosylated核酸上可逆无处不在的存在.
- 这些发现为了解超出蛋白质的翻译后修改开辟了新的途径.
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