用二金属的催化蛋白修饰:在设计和自然系统中的特异性
Zhen Chen1, Farrukh Vohidov, Jane M Coughlin
1Department of Chemistry, Rice University, Houston, Texas 77005, USA.
Journal of the American Chemical Society
|May 25, 2012
概括
这项研究引入了用于精确蛋白质修饰的 (rodium) 金属. 这些催化剂使得靠近和分子识别驱动的特定场所反应能够发生,即使在复杂的生物混合物中也是如此.
科学领域:
- 化学生物学 化学生物学
- 生物结合化学 生物结合化学
- 蛋白质工程是指蛋白质工程.
背景情况:
- 特定位置的蛋白质修饰对于理解蛋白质功能和开发治疗方法至关重要.
- 现有的方法往往缺乏效率,特异性或与生物环境的兼容性.
- 金属为蛋白质的向化学转化提供了一个有前途的平台.
研究的目的:
- 推进 (II) 金属的应用,用于特定位点的蛋白质修饰.
- 用基于的分子识别来探索和优化近距离驱动的催化.
- 在复杂的生物样本中证明正交蛋白质的修饰,如细胞溶解物.
主要方法:
- 使用 (II) 催化剂集成到结构中进行分子识别.
- 调查卷轴-卷轴识别动机,以控制催化剂的接近性和特异性.
- 设计和应用金属来修改自然蛋白质域,包括Fyn SH3域.
- 证明细胞溶解体内单独蛋白质的直角修饰.
主要成果:
- 通过结合识别和催化实现了特定位点的蛋白质修饰.
- 已确立了卷轴-卷轴识别作为金属酸催化剂特异性的关键决定因素.
- 成功地证明了细胞溶解酸中不同蛋白质的直角修饰.
- 扩展的近距离驱动的催化剂,以修改自然蛋白质域 (Fyn SH3) 使用富含proline的配体.
结论:
- (II) 金属为设计新的特定位点蛋白质修饰反应提供了一个多功能平台.
- 靠近驱动的催化,以识别为指导,使精确和正交的蛋白质标记成为可能.
- 这些进步为化学生物学研究和蛋白质工程应用提供了强大的工具.
相关概念视频
02:04Covalently Linked Protein Regulators
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.
01:26Protein Modifications in the RER
Modification of secretory and transmembrane proteins entering the rough ER begins in the ER lumen. These modifications aid in protein folding and stabilize the acquired tertiary structure. Protein modifications in the rough ER co-occur at different stages of protein folding.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal sequences.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal sequences.