细胞溶解体中的mRNA显示使得针对BRD3外终域的循环的识别成为可能
Catherine A Hurd1,2, Jacob T Bush3, Andrew J Powell3
1Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, London, W12 0BZ.
Angewandte Chemie (International ed. in English)
|June 20, 2024
概括
这项研究引入了一种新的mRNA显示方法,用于选细胞溶解体中的循环,扩大药物发现目标. 这种方法成功地确定了对挑战性蛋白质 (如BRD3.3) 的高亲和性结体.
科学领域:
- 生物化学和分子生物学
- 药物发现和开发 药物发现和开发
- 化学生物学 化学生物学
背景情况:
- 使者RNA (mRNA) 显示是一种强大的体外选择技术,用于发现高 afinity 联体.
- 目前的限制包括需要纯化的蛋白质标,将范围限制在可溶性域内,并排除易聚合的蛋白质.
- 具有挑战性的蛋白质标,通常很难用小分子药物,仍然未被充分探索.
研究的目的:
- 开发一种新的mRNA显示方法,使得直接在哺乳动物细胞溶解物中进行选择.
- 扩大mRNA显示的目标范围,超越纯化蛋白质,包括易聚合和全长目标.
- 为了确定新型的循环结合剂来挑战蛋白质标.
主要方法:
- 开发并实施了一种在原始哺乳动物细胞溶解物中执行的mRNA显示选择方法.
- 没有对目标蛋白质净化的要求,允许对复杂的生物矩阵进行选.
- 应用了用于识别NanoLuc亚单元 (LgBiT) 和全长原蛋白含有蛋白3 (BRD3) 的结合物的方法.
主要成果:
- 成功识别了对LgBiT和BRD3.3具有低至亚纳米级结合亲和度的循环.
- 针对BRD3的类蛋白与外地 (ET) 域结合,与与之密切相关的BRD2和BRD4.4交叉反应.
- 证明了mRNA在细胞溶解物中的显示选择的可行性,显著扩大了潜在的目标应用.
结论:
- 开发的基于细胞溶解酸的mRNA显示克服了传统方法的局限性,使得对更广泛的目标进行查.
- 确定了针对BRD蛋白质未经探索的ET域的新型循环,为研究提供了有价值的工具.
- 这种方法显著扩大了mRNA显示的实用性,用于发现对具有挑战性和复杂的蛋白质标的配体.
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