通过D2HG和L2HG发现了基拉依赖蛋白-2-Hydroxyglutarylation
Zheng Zhang1, Yi-Kai Liu1, Zhuojun Luo1
1Department of Biochemistry, Purdue University, West Lafayette, IN 47907, USA.
bioRxiv : the preprint server for biology
|February 20, 2025
概括
在IDH1/2中导致癌症的突变会导致D-2-基酸盐 (D2HG) 的积累. 这项研究表明,D2HG修改了MRCKA和SLK激酶,抑制了它们的活性和基质酸化.
科学领域:
- 生物化学 生化学
- 在瘤学瘤学.
- 化学生物学 化学生物学
背景情况:
- 异酸脱酶1 (IDH1) 和IDH2中的突变在各种人类癌症中很普遍.
- 这些突变导致D-2-基酸盐 (D2HG) 的积累,D2-基酸盐是促进瘤生长的代谢物.
研究的目的:
- 为了研究D2HG.介导的新型翻译后修饰.
- 探索蛋白质上的D2HG修饰的奇拉特异性.
- 确定D2HG的特定蛋白标,并评估这些修改的功能后果.
主要方法:
- 化学蛋白质学被用来发现和识别D2HG修饰的蛋白质.
- 体分析被用来区分D-2-基氨酸 (D2HG) 和L-2-基氨酸 (L2HG) 的修饰.
- 进行了激酶活性测试,以评估D2HG/L2HG修改对激酶功能的影响.
主要成果:
- 发现了一种由D2HG介导的新型的翻译后修饰,O-2-基质化.
- 对于D2HG和L2HG修饰,观察到明显的性偏好.
- 两个激酶,MRCKA (修改为D2HG) 和SLK (修改为L2HG),被确定为目标.
- 对于MRCKA和SLK,基质的酸化降低了,这表明这些修改具有抑制作用.
结论:
- D2HG和L2HG可以直接修改激酶,这表明癌症中新的一层代谢调节.
- 这些修改抑制了激酶活性,可能会影响下游信号通路,这对瘤发生至关重要.
- 这些发现为了解代谢物在癌症进展和治疗策略中的作用开辟了新的途径.
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