在无序结合动机中的链接器长度和组成调节了多价值蛋白相互作用开关的和可逆性
Kiran Sankar Chatterjee1, Maria A Martinez-Yamout1, H Jane Dyson1
1Department of Integrative Structural and Computational Biology and Skaggs Institute of Chemical Biology, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States.
反抑制剂CITED2通过取代低氧诱导因子HIF-1α来终止低氧反应. 改变HIF-1α结合亲和力的突变揭示了链接器灵活性和静电相互作用如何确保单向缺氧开关.
科学领域:
- 分子生物学分子生物学
- 生物化学 生物化学
- 遗传学 是一个遗传学.
背景情况:
- 本质上有障碍的蛋白质调节细胞对低氧的转录反应.
- 低氧诱导因子 (HIF) -1α是氧气压力基因的关键调节者.
- CITED2作为反抑制剂,终止了低氧反应.
研究的目的:
- 调查约束性合作在单向低氧开关中的作用.
- 了解HIF-1α中的链接器突变如何影响其与TAZ1的结合以及与CITED的竞争2.
- 为了阐明调整低氧开关的分子基础.
主要方法:
- 在HIF-1α激活域中的链接序列的突变发生.
- 分析TAZ1结合基因之间的热力学合.
- 评估HIF-1α的结合亲和力和与CITED的竞争2.
主要成果:
- 增强HIF-1α亲和力的链接器突变改善了它与CITED2的竞争.
- 结合亲和力受左边灵活性 (甘氨酸残留物) 和静电相互作用 (氨酸侧链) 的影响.
- 突变动物提供了对低氧开关调节的分子基础的洞察.
结论:
- 连接器序列和灵活性对于调节HIF-1α结合亲和度至关重要.
- 由进化压力驱动的低于最佳的HIF-1α结合亲和力,确保了单向的低氧开关.
- 了解这些机制是调节氧气应激反应的关键.
更多相关视频
07:22Author Spotlight: Evaluating Biophysical Assays for Characterizing PROTACS Ternary Complexes
Published on: January 12, 2024
10:17Creating Highly Specific Chemically Induced Protein Dimerization Systems by Stepwise Phage Selection of a Combinatorial Single-Domain Antibody Library
Published on: January 14, 2020
相关概念视频
Ligand Binding and Linkage
Ligand Binding and Linkage
Cooperative Allosteric Transitions
Cooperative Allosteric Transitions
Ligand Binding Sites
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...
Ligand Binding Sites
