氨酸核酸转位器和ATP合成酶合作调解线粒体透性过渡的过程
Ludovica Tommasin1, Andrea Carrer1, Federica Boscolo Nata1
1Department of Biomedical Sciences, University of Padova, Padova, Italy.
The Journal of physiology
|January 14, 2025
概括
腺核酸转位器 (ANT) 和ATP合成酶在线粒体透性过渡 (PT) 中进行合作. 一个,一个.
科学领域:
- 线粒体生理学线粒体生理学
- 膜运输是通过膜运输来实现的.
- 细胞生物能学 细胞生物能学
背景情况:
- 线粒体透性过渡 (PT) 涉及到内膜透性和胀.
- 涉及PT孔 (PTP),可能涉及腺因核酸转位器 (ANT) 和ATP合成酶.
- 在PTP形成中,ANT和ATP合成酶的不同作用和相互作用尚未完全理解.
研究的目的:
- 阐明ANT对PT的具体贡献.
- 为了研究在PTP形成中ANT和ATP合成酶之间的相互作用.
- 确定管理依赖ANT的PT的监管机制.
主要方法:
- 使用了选择性ANT抑制剂 (atractylate,bongkrekate) 和激活剂.
- 采用利氨酸氧化物来诱导PT.
- 在缺少ANTT的小鼠胚胎纤维细胞上进行实验.
- 对线粒体进行了补丁研究.
- 使用共免疫沉研究的蛋白质与蛋白质相互作用.
- 进行了对接模拟.
主要成果:
- 邦克雷凯特在pH7.4时部分抑制了Ca2+依赖的PT,并且没有在ANT-null细胞中消除氧化物诱导的PT.
- 在pH 6.5 (抑制ATP合成酶) 显而易见的ATP对PT的贡献与atractylate,诱导胀和电流.
- 二-423在pH值为6.5时刺激了ANT依赖的PT,这表明由ATP合成酶的外围茎调节.
- 同免疫沉证实了ANT与ATP合成酶子单元c和g的相关性.
- 结合c子单元的oligomycin降低了ANT-c关联,与对接模拟一致.
结论:
- 和ATP合成酶在产生线粒体透性过渡孔方面表现出密切的合作.
- ATP合成酶的外围茎似乎调节了ANTT通道的活动.
- 这些发现为PT的复杂机制提供了新的见解.
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