在Mycobacterium tuberculosis中,对博尔特佐米布诱导的病理分析性Chaperone-Protease系统激活的结构洞察力
Biao Zhou1,2,3,4, Yamin Gao4,5, Heyu Zhao4,5
1State Key Laboratory of Respiratory Disease, Guangzhou Chest Hospital, Institute of Tuberculosis, Guangzhou Medical University, Guangzhou, China.
Nature communications
|April 11, 2025
概括
抗癌药物博特佐米布激活了Mycobacterium tuberculosis Clp蛋白酶复合体,揭示了潜在的新抗结核战略. 这种药物是药物.
科学领域:
- 微生物学 微生物学
- 结构生物学 结构生物学
- 药物发现 药物发现 药物发现
背景情况:
- kazeinolytic 蛋白酶 (Clp) 系统是抗结核治疗的有效标.
- 一种抗癌药物博特佐米布 (Bortezomib) 通过与Mycobacterium tuberculosis (Mtb) Clp蛋白酶复合体相互作用,显示出显著的抗菌活性.
研究的目的:
- 阐明博特佐米布与Mtb Clp蛋白酶复合体相互作用的基础结构机制.
- 研究博特佐米布结合如何影响Mtb Clp全酶的组装和功能.
主要方法:
- 低温电子显微镜 (cryo-EM) 用于确定Mtb ClpP1P2,MtbClpC1P1P2和MtbClpXP1P2复合物的高分辨率结构.
- 生物化学试验,以评估博特佐米布结合和全酶形成的功能后果.
主要成果:
- 博尔特佐米布与Mtb Clp蛋白酶活性位点的亚静脉测量结合导致MtbClpP1P2复合体的orthosteric激活.
- 博尔特佐米布诱导的激活促进了MtbClpC1或MtbClpX陪伴者的招募,促进了全酶组合.
- 获得了MtbClpC1P1P2全酶中的MtbClpC1对基质转位和MtbClpX在MtbClpXP1P2全酶中的MtbClpX对基质通道封闭的结构见解.
结论:
- 博尔特佐米布结合通过与蛋白酶位点的亚静态度相互作用破坏了Mtb Clp系统的调节机制.
- 这些发现提供了对Mtb Clp系统调节的更深入的理解,并建议针对该途径的潜在治疗策略.
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