通过MRBLE:Dephos和全球基质识别发现的酸酶特异性原则
Jamin B Hein1,2, Hieu T Nguyen3, Dimitriya H Garvanska1
1Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
Molecular systems biology
|November 2, 2023
概括
研究人员开发了一种新的测定方法,MRBLE:Dephos,以研究蛋白质酸酶的特异性. 这种方法揭示了对PP1和PP2A-B55的关键偏好,提高了对线粒体退出调节的理解.
科学领域:
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
- 生物化学 生物化学
背景情况:
- 蛋白酸酶 (PPPs) 是细胞信号通路的关键调节者.
- 了解PPP的特异性决定因素是必不可少的,但由于缺乏可扩展的调查方法而受到阻碍.
研究的目的:
- 开发一种新的体外测定方法,用于大规模研究酸酶特异性.
- 为了确定蛋白质酸酶1 (PP1) 和蛋白质酸酶2A-B55 (PP2A-B55) 的基质偏好.
- 阐明这些酸酶在调节线粒细胞退出中的作用.
主要方法:
- 开发一个多重化 in vitro 脱化试验,MRBLE:Dephos.
- 确定PP1和PP2A-B55.5的脱化场所周围的氨基酸偏好.
- 应用PP1和PP2A-B55在线索性出口溶解体中的特异性抑制.
- 蛋白质分析,以确定在线粒体退出过程中调节的酸化部位.
- 蛋白质组数据与酶互动组数据的整合.
主要成果:
- MRBLE:Dephos成功确定了PP1和PP2A-B55.5的共同和独特的氨基酸偏好.
- 确定了2000多个在线粒体退出过程中调节的酸化位.
- 在线虫退出过程中脱的部位表现出与MRBLE:Dephos预测一致的特征.
- 了解酸酶-基质结合的影响如何获得酸化.
结论:
- 新的MRBLE:Dephos测定使得可扩展的酸酶特异性的调查成为可能.
- PP1和PP2A-B55表现出不同的,但重叠的基质偏好.
- 这些发现为我们更深入地了解了蛋白质酸酶对线粒体退出的调节.
相关概念视频
02:54Protein Kinases and Phosphatases
13.2K
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
13.2K
01:02Phosphorylation
50.4K
The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
50.4K