在蛋白质领域的进化和种群约束的统一分析突出了结构特征和病原性位点
Stuart A MacGowan1, Fábio Madeira1,2, Thiago Britto-Borges1,3
1Division of Computational Biology School of Life Sciences University of Dundee, Dow Street Dundee, DD1 5EH, Scotland, UK.
Communications biology
|April 11, 2024
概括
人群测序揭示了残留水平蛋白质约束,补充了进化数据. 这种新的Missense丰富分数 (MES) 有助于预测蛋白质结构和识别病原体位点.
科学领域:
- 生物化学和结构生物学
- 基因组学和生物信息学
- 进化生物学 进化生物学
背景情况:
- 蛋白质进化是由结构和功能限制塑造的,导致保存的残留模式.
- 人类人口测序提供了大规模的数据来研究跨个体的变化.
- 虽然人类人口约束有助于病原性预测,但其在结构推理中的使用尚未被探索.
研究的目的:
- 探索人类人口序列变异对蛋白质结构推理的有用性.
- 开发和应用一种新的指标,即Missense丰富度得分 (MES),用于量化残留水平约束.
- 为新型残留物分类,将人口限制与进化保护相结合.
主要方法:
- 将240万个人类种群变体映射到5885个蛋白质家族.
- 计算残留水平限制的错误丰富度得分 (MES).
- 从3661个家族的蛋白质数据库 (PDB) 中分析了61,214个蛋白质结构.
主要成果:
- 错误的含义枯竭的网站被埋藏的残留物和那些参与分子结合的遗留物丰富.
- MES指标是对传统的进化保护的补充.
- 综合分析揭示了不同的残留物类,包括进化多样化的功能部位和关键保存部位.
结论:
- 人类人口约束为了解蛋白质结构和功能提供了一个有价值的,对进化保护的补充视角.
- MES方法促进了残留物的新分类,突出了与特异性和基本折叠/功能角色相关的位置.
- 该研究确定了致死性和非致死性病原体部位之间的潜在差异,以及一种新的临床变异热点.
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