对Trypanosoma cruzi蛋白质体的药理和结构理解为开发特定位点抑制剂提供了关键的见解
Thomas C Eadsforth1, Leah S Torrie1, Paul Rowland2
1Wellcome Centre for Anti-Infectives Research, University of Dundee, Dundee, UK.
The Journal of biological chemistry
|December 5, 2024
概括
这项研究探讨了蛋白酶体作为查加斯病的药物点. 创建了重组Trypanosoma cruzi蛋白酶体,揭示了对药物抑制的见解,并使结构导向药物发现成为可能.
科学领域:
- 分子生物学分子生物学
- 寄生虫学的寄生虫学
- 药物发现 药物发现 药物发现
背景情况:
- 蛋白酶体是癌症和传染病的验证药物标.
- 针对传染病原体蛋白质体的挑战包括供应,结构数据和复杂的药理学.
- 由Trypanosoma cruzi引起的查加斯病仍然是一个重要的未满足的医疗需求.
研究的目的:
- 为了重组表达和表征Trypanosoma cruzi蛋白质体.
- 为了研究T. cruzi蛋白质体的基质杂交和药理学.
- 为了实现对查加斯病的结构导向药物发现.
主要方法:
- 重组表达T. cruzi蛋白酶和活性位点突变.
- 对蛋白酶体抑制剂的药理学评估.
- 高分辨率冷电子显微镜 (CryoEM) 结构确定.
- 对耐药突变体的分析.
主要成果:
- 再组合的T. cruzi蛋白酶体在药理上相当于原生形式.
- 活点突变显示了基质的乱交性,影响了抑制剂的评估.
- 一些选择性抑制剂表现出部分抑制,但对细胞内寄生虫仍然有效.
- 与Leishmania相比,CryoEM结构在T. cruzi蛋白质酶体的联结部位中发现了独特的特征.
- 在其他原生虫寄生虫中注意到没有试诺索马提德β4/β5选择性口袋.
结论:
- 精确评估蛋白质酶体药理学和基质选择性至关重要.
- 这项工作为针对T. cruzi蛋白酶的结构导向药物发现提供了基础.
- 这项研究提供了一个新的化学起点,并为查加斯病和其他真核生物感染提供了强大的药物发现计划.
相关概念视频
02:04Protein-protein Interfaces
12.5K
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...
12.5K
01:26Targets for Drug Action: Overview
6.1K
Drugs target macromolecules to modify ongoing cellular processes. Primary drug targets include receptors, ion channels, transporters, and enzymes.
Receptors are either membrane-spanning or intracellular proteins, which upon binding a ligand, get activated and transmit the signal downstream to elicit a response. Drugs bind receptors, either mimicking the action of endogenous ligands or blocking the receptor activity to bring about a modified response. Nearly 35% of approved drugs target the G...
Receptors are either membrane-spanning or intracellular proteins, which upon binding a ligand, get activated and transmit the signal downstream to elicit a response. Drugs bind receptors, either mimicking the action of endogenous ligands or blocking the receptor activity to bring about a modified response. Nearly 35% of approved drugs target the G...
6.1K