超越MIDAS:在中研究αvβ3整体蛋白中的假定非正规C16结合位
Francisco Das Chagas Pereira de Andrade1,2, Yago Ferreira E Silva3,4, Paulo Ricardo Batista3,4
1Laboratory of Innovation in Science and Technology - LACITEC, Department of Biophysics and Physiology, Federal University of Piauí, Teresina, Piauí 64049-550, Brazil.
ACS omega
|March 9, 2026
概括
这项研究揭示了C16对αvβ3整体的新型结合部位,解释了其优先相互作用. 这些发现为设计针对癌症进展的向类疗法提供了洞察力.
科学领域:
- 生物化学 生物化学
- 计算生物学 计算生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 集成蛋白,如αvβ3和α5β1,对于细胞信号传递,血管新生和瘤生长至关重要.
- 拉米宁-1衍生C16结合了αvβ3和α5β1整合素,但其特异性决定因素是未知的.
研究的目的:
- 通过计算来描述C16的药理动力学特性.
- 阐明C16与αvβ3和α5β1整合素结合的基础分子机制.
- 确定C16与αvβ3.3的优先结合的结构决定因素.
主要方法:
- 综合计算方法:ADMET预测,分子对接和全原子分子动力学 (MD) 模拟.
- 对C16的药理分析.
- 结合模式和互动在整合素口袋中的分析.
主要成果:
- C16具有较低的口服生物可用性和透性,但具有良好的结合性和中度的代谢稳定性.
- 在αvβ3和α5β1中,C16通过保守的相互作用与金属离子依赖粘附位 (MIDAS) 结合.
- 在αvβ3中发现了一种新的非正规结合口袋 (S2),在α5β1中缺少,这增强了C16结合亲和力.
- MD模拟证实了C16-整合素复合物的稳定性,对αvβ3的稳定性更高,特别是在S2位点.
结论:
- 提出了一种新的C16与αvβ3整合素的结合方式,涉及MIDAS和非正规的S2口袋.
- 这些发现为C16.的整合素亚型选择性提供了结构性的见解.
- 该研究告知了针对血管生成和瘤入侵的基于的治疗方法的合理设计.
相关概念视频
00:49Ligand Binding and Linkage
5.8K
Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
5.8K
01:49Conserved 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
01:19Allosteric Proteins-ATCase
6.8K
Binding sites linkages can regulate a protein's function. For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
6.8K
01:10Integrins
5.9K
Animal and protozoan cells do not have cell walls to help maintain shape and provide structural stability. Instead, these eukaryotic cells secrete a sticky mass of carbohydrates and proteins into the spaces between adjacent cells. This network of proteins and molecules is called an extracellular matrix or ECM.
Some ECM proteins assemble into a basement membrane to which the remaining components adhere. Proteoglycans typically form the bulk of the ECM while fibrous proteins, like collagen,...
Some ECM proteins assemble into a basement membrane to which the remaining components adhere. Proteoglycans typically form the bulk of the ECM while fibrous proteins, like collagen,...
5.9K
01:17Intracellular Signaling Affects Focal Adhesions
3.7K
Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Some...
3.7K
02:40Ligand Binding Sites
15.6K
Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
15.6K