需要对NBD1能量和域接口进行校正,以恢复 ΔF508 CFTR 折叠和功能
Wael M Rabeh1, Florian Bossard, Haijin Xu
1Department of Physiology, McGill University, Montréal, Quebec H3E 1Y6, Canada.
Cell
|January 24, 2012
概括
纠正囊性纤维化跨膜导电调节器 (CFTR) 错误折叠需要稳定NBD1域能量和NBD1-MSD2接口. 这种双重方法对于恢复CFTR蛋白的功能和运输至关重要.
科学领域:
- 蛋白质折叠和生物物理学
- 膜蛋白的分子生物学
- 囊性纤维化病原体的发生.
背景情况:
- 像CFTR这样的多域蛋白质的折叠和错误折叠是复杂的,并未完全理解.
- 在CFTR中ΔF508突变导致NBD1域的热力学不稳定,导致蛋白质降解,是囊性纤维化治疗的关键标.
- 在NBD1不稳定性和整体CFTR错折之间确切的关系仍然不清楚.
研究的目的:
- 调查NBD1热力学和动力学不稳定性对 ΔF508 CFTR 错误折叠的特定贡献.
- 确定恢复DF508 CFTR野生类型的折叠,加工和功能的结构要求.
- 为开发改善的囊性纤维化治疗策略提供框架.
主要方法:
- 对NBD1域的热力学和动力学稳定性测试.
- 在针对性稳定策略的响应下,对DF508CFTR生物发生,加工和运输进行分析.
- 研究NBD1-MSD2接口在CFTR域组装和功能中的作用.
主要成果:
- F508突变使NBD1不稳定,无论是热力学还是动力学.
- 仅仅稳定NBD1能量或NBD1-MSD2接口是不足以挽救ΔF508CFTR生物发生.
- 同时稳定NBD1能量和NBD1-MSD2接口对于野生类型CFTR折叠,处理和功能是必要的.
- 在 ΔF508 CFTR 中明显的结构缺陷解释了当前校正分子的有效性有限.
结论:
- CFTR折叠和组装依赖于NBD1域能量和NBD1-MSD2接口的协同作用.
- 针对这些明显缺陷的基于结构的组合疗法为治疗囊性纤维化提供了一个有希望的策略.
- 了解多域膜蛋白的接口突变机制对于药物开发至关重要.
相关概念视频
Conservation of Protein Domains Over Different Proteins
14.1K
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...
14.1K
Protein Folding
127.0K
Overview
127.0K
Protein-protein Interfaces
14.6K
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
14.6K
Molecular Chaperones and Protein Folding
19.7K
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...
19.7K
Restorative Care
2.4K
Restorative care is provided once a patient has been discharged from a healthcare facility and requires additional services. The additional services include home care, rehabilitation programs, and extended care. Restorative care centers help the patient regain their previous level of functioning or acquire a new level of functioning due to the incapacitating effects of a disease or a disability. It aims to assist patients in enhancing their quality of life by encouraging independence,...
2.4K
Energetics of Solution Formation
7.4K
The formation of a solution is an example of a spontaneous process, which is a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent...
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent...
7.4K


