在p53中的proline丰富域的 conformational灵活性和短暂结构
Agnes Berggren1, Michael Bakker2, Hayden Fisher3
1Division of Computational Chemistry, Department of Chemistry, Lund University, P.O. Box 124, 22100 Lund, Sweden; NanoLund, Lund University, P.O. Box 118, 22100 Lund, Sweden.
Biophysical journal
|March 15, 2026
概括
瘤抑制剂p53的proline丰富域 (PRD) 在很大程度上是无序的,但具有短暂的结构. 氨酸残留物产生刚性,影响p53.
科学领域:
- 生物物理学的生物物理.
- 结构生物学 结构生物学
- 计算生物学 计算生物学
背景情况:
- 瘤抑制剂p53蛋白的富含proline的域 (PRD) 对其功能至关重要.
- p53 PRD的内在结构动力学和形状组合尚未完全理解.
研究的目的:
- 用分子动力学 (MD) 模拟和生物物理验证来描述p53 PRD的构造组合.
- 调查林残留物和短暂结构在调节PRD动态中的作用.
主要方法:
- 全原子分子动力学 (MD) 模拟p53的PRD.
- 生物物理验证使用循环二元化 (CD) 和小角度X射线散射 (SAXS).
- 对形状组合,二次结构含量和残留物特定相互作用的分析.
主要成果:
- p53 PRD 作为一个内在无序区域 (IDR) 功能,具有异质的构造组合.
- 过渡性聚二烯 (PPII) 螺旋和β曲线突出,连接保存的PXXP图案.
- 连续的普罗林,如Pro71-Pro72,诱导了硬体约束,稳定了扩展的形状,限制了崩.
- 对p53变体 (P72R,P82L) 的模拟显示了突变特异性扰动,影响了刚性和PPII螺旋形成.
结论:
- 林介导的刚性和短暂的PPII结构是p53PRD动态形状的关键决定因素.
- 对于PRD在p53功能中的作用来说,其混乱但部分结构化的性质是必不可少的.
- 了解PRD的动态,可以了解p53的调节和疾病相关突变的影响.
相关概念视频
Protein Folding
129.8K
Overview
129.8K
Protein Folding
12.1K
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...
12.1K
Intrinsically Disordered Proteins
21.0K
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...
21.0K
Covalently Linked Protein Regulators
9.9K
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....
These groups modify specific amino acids in a protein....
9.9K
Conserved Binding Sites
5.3K
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
5.3K
Conservation of Protein Domains Over Different Proteins
14.9K
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
14.9K


