埃尔戈氨酸通过直接激活MPST来增强线粒体呼吸和运动性能
bioRxiv : the preprint server for biology
|April 22, 2024
概括
与衰老相关的氨基酸欧戈氨酸 (EGT) 激活了MPST酶. 这促进了线粒体功能和运动表现,揭示了EGT的一个关键分子标.
科学领域:
- 线粒体生物学 线粒体生物学
- 营养生物化学 营养生物化学
- 运动生理学 运动生理学
背景情况:
- 欧戈氨酸 (EGT) 是一种在人体组织中发现的饮食衍生的氨基酸.
- 低EGT水平与神经退行性和心血管疾病等与年龄相关的疾病有关.
- 在老鼠疾病和衰老模型中,EGT显示出保护作用,但其分子标是未知的.
研究的目的:
- 系统地识别欧戈氨酸 (EGT) 的分子标.
- 为了研究线粒体如何改变其新陈代谢对运动的反应.
- 阐明EGT影响线粒体功能和运动表现的机制.
主要方法:
- 在运动训练期间对线粒体代谢变化的系统分析.
- 蛋白质组全方位的热稳定性测试以确定直接的分子相互作用.
- 在小鼠中评估线粒体呼吸和运动表现.
主要成果:
- 运动训练后,埃尔戈氨酸 (EGT) 在肌肉线粒体中积聚.
- 鉴定出3 - 甲基酸硫转移酶 (MPST) 是EGT的直接分子标.
- EGT与MPST结合并激活MPST,增强小鼠的线粒体呼吸和运动表现.
结论:
- 这项研究确定了3-mercaptopyruvate硫转移酶 (MPST) 作为第一个生理学上相关的ergothioneine (EGT) 分子标.
- 埃尔戈氨酸-MPST (EGT-MPST) 轴被确立为调节线粒体功能的一种新机制.
- 这个轴在调节运动训练表现方面发挥着至关重要的作用.
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