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A small molecule approach to spatial and temporal control of covalent protein inhibition in cells

细胞内共价蛋白抑制的空间和时间控制的小分子方法

基本信息

批准号：
2883086
负责人：
金额：
--
依托单位：
University of Leeds
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2023
资助国家：
英国
起止时间：
2023 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2883086
关键词：
small molecule approach spatial temporal

项目摘要

Small molecules that covalently modify proteins are valuable therapeutics and chemical probes for biological discovery. For example, broad-spectrum reactive probes can be used to identify new ligandable sites in proteins that could be targeted by small molecules, and to profile protein modifications that nature uses to modulate protein function. Covalent inhibitors that modify a protein target are an important and growing class of drugs. However, these inhibitors are always "on". The conformations, modifications and locations of proteins in cells are key determinants of biological function, and the goal of this project is to develop a covalent inhibitor that can be switched on in the cell to study the biology of a protein in a defined location and at a specific time. This project will develop chemistry to label protein cysteines in cells using covalent inhibitors with spatial and temporal control. Cysteines are the most frequently targeted residue in covalent inhibitors and are functionally interesting residues that are involved in redox processes and other protein modifications in biology. We will cage cysteine-reactive inhibitors, generating compounds that can enter cells and subsequently be uncaged at a time and place of our choosing to label proteins. This approach would allow us to overcome the potential broad toxicity of covalent probes, and control the time and location (e.g. organelle or tissue) of inhibition.

共价修饰蛋白质的小分子是用于生物发现的有价值的治疗剂和化学探针。例如，广谱反应探针可用于识别蛋白质中可被小分子靶向的新配位位点，并分析自然界用于调节蛋白质功能的蛋白质修饰。修饰蛋白质靶标的共价抑制剂是一类重要且不断增长的药物。然而，这些抑制剂始终处于“开启”状态。细胞中蛋白质的构象、修饰和位置是生物功能的关键决定因素，该项目的目标是开发一种可以在细胞中打开的共价抑制剂，以研究蛋白质在特定位置和特定时间的生物学。该项目将开发化学方法，使用具有空间和时间控制的共价抑制剂来标记细胞中的蛋白质半胱氨酸。半胱氨酸是共价抑制剂中最常见的目标残基，也是参与氧化还原过程和生物学中其他蛋白质修饰的功能上有趣的残基。我们将笼住半胱氨酸反应性抑制剂，产生可以进入细胞的化合物，然后在我们选择的标记蛋白质的时间和地点被释放。这种方法将使我们能够克服共价探针潜在的广泛毒性，并控制抑制的时间和位置（例如细胞器或组织）。