用基因编码的2,3-diaminopropionic酸捕获乙酶中间体,用于酶基质的识别
1Department of Oncology, The First Affiliated Hospital of USTC, Key Laboratory of Immune Response and Immunotherapy, Centre for Advanced Interdisciplinary Science and Biomedicine of IHM, MOE Key Laboratory for Membraneless Organelles & Cellular Dynamics, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China.
Nature protocols
|June 12, 2024
概括
这项研究引入了一种新方法,使用含有2,3-氨酸 (DAP) 的酶突变物来捕获和识别酶基质. 这种技术使得在各种细胞类型中发现了氨酸或氨酸酸酶基质.
科学领域:
- 生物化学 生化学
- 分子生物学分子生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 氨酸和氨酸水解酶在生物过程中起着至关重要的作用.
- 识别它们的基质对于理解酶功能至关重要.
- 目前用于基质识别的方法可能具有挑战性,特别是在复杂的生物系统中.
研究的目的:
- 提供一个详细的协议,用于基质捕获和识别,使用遗传编码的含有2,3-氨酸 (DAP) 的化酶突变物.
- 为了证明这种方法用于识别人类疹病毒的基质的应用1 UL36 酸酶域.
- 为了使细胞溶解物和活哺乳动物细胞中的基质识别.
主要方法:
- 酶突变的发展,催化氨酸或氨酸被DAP取代.
- 捕获过渡性乙酶中间体作为稳定的胺类同类物.
- 下游识别被困的基质碎片使用质谱和免疫阻塞.
- 在细胞溶解物和活哺乳动物细胞 (附着物和悬浮物) 中捕获基质的详细一步步程序.
主要成果:
- 成功展示了DAP介导的基质捕获和识别.
- 对人类疹病毒1 UL36USP酶域的基质的鉴定.
- 协议适应各种细胞类型,包括细菌,酵母和哺乳动物细胞.
结论:
- 通过DAP介导的基质捕获是一种多功能且有效的方法,用于识别氨酸和氨酸酸酶基质.
- 这一协议有助于在复杂的混合物和活细胞中发现基质.
- 该方法为推进酶学和病毒学研究提供了一种实用方法.
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