在黄昏区的远程同质性的物理化学评估
Jamie Dennis Dixson1, Rajeev Kumar Azad1,2
1Department of Biological Sciences, University of North Texas, Denton, Texas, USA.
Proteins
|September 2, 2024
概括
识别远距离相关的蛋白质之间的进化关系,被称为"黄昏区",是具有挑战性的. 分子重量-水性 物理化学动态时间变形 (MWHP DTW) 提供了一种基于序列的新方法,以准确检测在这个困难的进化范围内的同质性.
科学领域:
- 蛋白质进化生物学 蛋白质进化生物学
- 生物信息学是一种生物信息学.
- 结构生物学 结构生物学
背景情况:
- 确定具有<30%氨基酸同一性 (黄昏区) 的同类蛋白质之间的进化相关性是一个重大挑战.
- 现有的方法通常依赖于耗时且昂贵的实验结构确定.
- 由于替代和,标准序列对齐算法难以在"黄昏地带"中识别同质性.
研究的目的:
- 引入和验证分子重量-水性物理化学动态时间扭曲 (MWHP DTW) 作为量化蛋白质相似性的新方法.
- 为了证明MWHP DTW在识别黄昏区蛋白质内同质性的有效性.
- 通过整合结构,物理化学和基于序列的指标来扩展黄昏区的定义.
主要方法:
- 利用MWHP DTW,一种仅需要氨基酸序列的物理化学方法.
- 应用MWHP DTW来量化模拟和现实世界同类蛋白质域的相似性.
- 评估了该方法在0%-20%的同一性范围内从随机相似性中区分真实同质性的能力.
主要成果:
- MWHP DTW有效量化了同类蛋白质的相似性,特别是在黄昏区内.
- 该方法通过利用物理化学保存成功识别了隐藏的同质性,克服了标准序列对齐的局限性.
- 证明了以前难以捉摸的ACE2-结合性β冠状病毒受体结合域 (RBDs) 的准确功能聚类.
结论:
- MWHP DTW是一个强大的,基于序列的工具,用于检测蛋白质黄昏区的同质性.
- 这种方法克服了初级序列替代和,并确定了隐藏的进化关系.
- 提出了一个扩展的"黄昏区"定义,包括结构,物理化学和序列数据之间的动态关系.
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