解离折叠与结合的能量基础对于一个本质上是无序的蛋白质来说
Igor Drobnak1, Natalie De Jonge, Sarah Haesaerts
1Department of Physical Chemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Askerceva 5, 1000 Ljubljana, Slovenia.
Journal of the American Chemical Society
|January 8, 2013
概括
内在无序的蛋白质 (IDP) 通过结合折叠实现高亲和度的结合. 特定的分子内相互作用和溶解驱动这个过程,揭示了关键的分子力.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 分子生物物理学 分子生物物理学
背景情况:
- 内在无序的蛋白质 (IDP) 缺乏稳定的结构,但可以在结合时折叠.
- 了解IDP结合的热力学是至关重要的,但在实验上具有挑战性.
- 在细胞过程中,IDP-目标相互作用至关重要.
研究的目的:
- 研究固有无序蛋白质结合的热力学和结构基础.
- 为了阐明驱动抗毒素CcdA到CcdB的结合合折叠的力量.
- 为IDP-蛋白相互作用的能量景观提供实验数据.
主要方法:
- 蛋白质与蛋白质相互作用的热力学分析.
- 蛋白质复合体的结构研究.
- 结合式合折叠机制的特征.
主要成果:
- 结合合的CcdA折叠是由分子内相互作用和溶解驱动的.
- 内部发展计划的最终结构主要是按顺序确定,合作伙伴充当促进者.
- 特定的分子间接触增强了与皮科莫拉范围的结合亲和力.
结论:
- 内部开发人员可以通过结合内在的折叠倾向和合作伙伴促进的互动来实现强大,特定的结合.
- 这项研究提供了对高亲和度IDP结合背后的分子机制的见解.
- 这项工作有助于理解IDP在生物系统中的作用和潜在的治疗向.
相关概念视频
Protein Folding
Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Folding
Overview
Protein Folding
Overview
Molecular Chaperones and Protein Folding
The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
The...
Molecular Chaperones and Protein Folding
The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
The...
Intrinsically Disordered Proteins
Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...


