特定于王国的脂质不和校准了真核生物呼吸复合体膜臂子单元的序列演变
Pooja Gupta1,2, Sristi Chakroborty1, Arun K Rathod2,3
1CSIR- Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad - 500007, India.
Nature communications
|February 27, 2025
概括
脂质蛋白相互作用稳定了膜蛋白复合体,影响了它们的序列演变. 不同的脂质环境导致呼吸复合体的分歧,影响物种间的蛋白质稳定性和功能.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 蛋白质复合体 (PCs) 在蛋白质-蛋白质相互作用 (PPIs) 的约束下演变,这些相互作用是保存的,容易发生疾病突变.
- 膜蛋白复合体与脂质相互作用,但这些脂质-蛋白相互作用 (LPIs) 如何影响序列演变仍不清楚.
研究的目的:
- 研究LPIs如何限制膜蛋白复合体的序列演变.
- 为了比较暴露于脂质的呼吸复合体 (RCs) 子单元和水性环境中的子单元的序列演变.
主要方法:
- 在呼吸系统复杂子单元中的序列演变的比较分析.
- 分子动力学模拟用于研究脂质-蛋白质相互作用.
- 在纤维化试验中评估蛋白质的稳定性和功能.
主要成果:
- 内线粒体膜 (IMM) 子单元的脂质暴露表面积累了与PPI无关的疾病突变,这表明LPI稳定RCs.
- IMM子单位在王国内部具有很高的序列保护,但在王国之间存在显著的分歧.
- 分子动力学和纤维化分析揭示了特定王国的LPIs,由脂质不和驱动,影响蛋白质稳定性并导致王国间不兼容性.
结论:
- LPIs在稳定膜蛋白复合体和校准其序列演变方面发挥着至关重要的作用.
- 王国之间的脂质组成的差异,特别是心脂蛋白脂肪酸链不和,有助于呼吸系统复杂子单元的分歧和不相容.
- 改变的LPIs可能会影响呼吸系统复合体等重要细胞机制的稳定性和功能.
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