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BRAWNIN的淘汰对人类细胞中的线粒体复合体III组件的影响最小
1Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, College of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
Biochimica et biophysica acta. Molecular cell research
|September 28, 2023
概括
棕色蛋白对线粒体复合体III组合至关重要,其删除会损害功能. 然而,BRAWNIN knockdown对线粒体呼吸和酸盐代谢的影响很小.
科学领域:
- 线粒体生物学 线粒体生物学
- 细胞呼吸 细胞呼吸
- 分子遗传学 分子遗传学
背景情况:
- 布朗尼因被确定为线粒体呼吸复合体III (CIII) 组装因子.
- 营养压力会影响布朗宁水平,与AMPK激活呈反向关系.
研究的目的:
- 研究布朗尼在线粒体复合体III组合和整体线粒体功能中的特定作用.
- 为了区分布朗尼删除对细胞呼吸和氧化酸化的效应.
主要方法:
- CRISPR/Cas9基因编辑用于布朗宁淘汰赛.
- 氧化酸化 (OXPHOS) 复合物的生物化学和功能分析.
- 转录基因和蛋白质基因分析.
- 同免疫沉和质谱学.
- 代谢分析侧重于pyruvate代谢.
主要成果:
- BRAWNIN删除,但没有敲除,显著损害了CIII组合和降低了CIII水平.
- 布拉尼因的中断没有影响线粒体呼吸或OXPHOS复合体I-V的完整性.
- 转录基因和蛋白质基因数据表明,布朗宁对线粒体功能的冲击影响很小.
- 只有BRAWNIN的一小部分与OXPHOS子单元相互作用.
- CIII组装需要最小的布朗宁,它可以微调线粒体的酸盐代谢.
结论:
- 棕色素对于CIII组装至关重要,删除会导致显著的损伤.
- 在整体线粒体呼吸和OXPHOS完整性中BRAWNIN的作用在中断时似乎是最小的.
- 布朗尼因可能在线粒体的pyruvate代谢中起着调节作用.
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