在14-3-3蛋白相互作用中的多价值的热力学模型
Loes M Stevers1, Pim J de Vink1, Christian Ottmann1
1Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems , Technische Universiteit Eindhoven , P.O. Box 513, Eindhoven 5600 MB , The Netherlands.
Journal of the American Chemical Society
|October 10, 2018
概括
我们开发了一种多价值蛋白与蛋白相互作用的热力学模型, 揭示了多个结合点如何影响结合亲和力. 这项工作为复杂疾病的药物发现提供了PPI稳定性的见解.
科学领域:
- 生物化学
- 分子生物学
- 化学热力学
背景情况:
- 蛋白与蛋白的相互作用对细胞功能至关重要.
- 涉及多个结合部位的PPI的多价值性在理解细胞控制和开发治疗中提出了复杂的挑战.
- 现有的热力学模型往往无法完全描述多价值相互作用.
研究的目的:
- 使用有效度作为关键参数,建立多价 PPI 的热力学结合模型.
- 用非价值CFTR和六价值LRRK2蛋白质研究双价值14-3-3蛋白质支架的结合热力学.
- 分析个别结合位点对整体亲和力的贡献,并预测位点调节的影响.
主要方法:
- 基于二极管宿主-客系统的热力学模型的开发.
- 作为双价相互作用中分子内结合的参数,有效度的表征.
- 用CFTR和LRRK2测定14-3-3的结合热力学.
- 蛋白质与蛋白质结合的计算模拟.
主要成果:
- 该模型成功地描述了多价值PPI,强调了有效度的作用.
- 在CFTR-14-3-3和LRRK2-14-3-3系统中观察到和相关性.
- 模拟显示CFTR与14-3-3的结合涉及多个位点,在移除最强位点时具有适应性.
- 两个位点主导LRRK2结合,但第三个位点也会导致复杂的形成.
结论:
- 热力学建模为分析和预测多价值PPI的行为提供了一个框架.
- 了解个体位点在多价物相互作用中的贡献是调节PPI的关键.
- PPI稳定是针对疾病多价值相互作用的药物发现的有希望的策略.
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