基于电荷的短暂相互作用在内在无序蛋白质的结构和功能相关性
Samuel Wohl1, Yishai Gilron2, Wenwei Zheng2
1Department of Physics, Arizona State University, Tempe, AZ 85287, USA.
bioRxiv : the preprint server for biology
|November 18, 2024
概括
内在无序的蛋白质 (IDP) 使用带电的氨基酸排列来形成短暂的相互作用. 这一发现揭示了对生物系统中的IDP行为和功能的新见解.
科学领域:
- 生物化学和分子生物学
- 蛋白质结构和动态 蛋白质结构和动态
- 生物物理学的生物物理.
背景情况:
- 内在无序的蛋白质 (IDP) 缺乏稳定的结构,存在于由弱相互作用控制的灵活组合中.
- 新出现的证据表明,短暂的,特定的相互作用影响了超越同聚合物理论的IDP构造性行为.
- 了解这些特定相互作用的驱动因素对于阐明IDP功能至关重要.
研究的目的:
- 研究IDP序列中带电氨基酸的空间排列如何影响短暂的,特定的相互作用.
- 建立序列属性与短暂相互作用的普遍性之间的定量关系.
- 探索这些相互作用对相分离冷凝物中的IDP行为及其功能相关性的影响.
主要方法:
- 利用模型来建立暂时相互作用和有效充电补丁长度之间的经验关系.
- 检查的IDP组合在模拟的相隔冷凝液中具有不同的短暂相互作用水平.
- 进行了全蛋白质组扫描人类蛋白质组中无序区域的基于电荷的短暂相互作用.
主要成果:
- 引入了"有效充电补丁长度",作为衡量充电补丁驱动短暂相互作用的能力的指标.
- 在具有显著过渡相互作用的IDP合奏中观察到凝聚物跨度网络结构的形成.
- 确定大约10%的人类混乱区域表现出电荷驱动的短暂相互作用,导致异聚合物行为.
结论:
- 充电残留物的空间布局显著影响了IDP中短暂相互作用的流行率.
- 电荷驱动的短暂相互作用促进了IDP中的异聚合物结构行为,特别是在相隔凝结体内.
- 这些相互作用富含了特定的分子功能,突出了它们的生物学意义.
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