53BP1的共同进化动态及其对TP53相互作用对DNA损伤修复的影响
Komal Kumari1, Gyan Prakash Rai2, Srishti Shriya1
1Department of Biotechnology, Central University of South Bihar, Gaya, Bihar 824236, India.
Computational biology and chemistry
|May 18, 2025
概括
同进化分析揭示了53BP1蛋白中的氨基酸变化如何增强其与p53的相互作用,改善DNA修复和基因组稳定性. 这些发现揭示了蛋白质进化及其功能后果.
科学领域:
- 分子生物学分子生物学
- 结构生物学 结构生物学
- 基因组学就是基因组学.
背景情况:
- 53BP1蛋白对于通过非同类末端连接 (NHEJ) 来修复DNA损伤至关重要.
- 53BP1与p53相互作用,p53是DNA损伤反应 (DDR) 的关键调节器,保持基因组稳定性.
研究的目的:
- 在53BP1中研究共进化的作用.
- 评估同进化对53BP1结构完整性和p53结合亲和力的影响.
主要方法:
- 多个序列对齐和家族遗传学分析以确定共同演变的氨基酸残留物.
- 点位突变映射和DynaMut稳定性分析以评估突变效应.
- 分子对接研究来评估53BP1-p53的相互作用.
主要成果:
- 在53BP1中确定了72个共同演变的残留组,其中5个被映射到BRCT域.
- 同进化诱导的修改增强了53BP1-p53的结合亲和力,特别是在12 (-9.9 kcal/mol) 和16 (-9 kcal/mol) 组中,超过了野生类型 (-8.9 kcal/mol).
- 这些修改引入了新的相互作用,有助于增强结构稳定性.
结论:
- 同进化显著影响蛋白质-蛋白质相互作用和功能结果.
- 了解53BP1的共同进化为维护DNA修复的结构和功能完整性提供了洞察力.
- 突出了蛋白质复合体稳定性和功能背后的进化机制.
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