使用甲基乙酸电友的反应性架构造型
Laura C McGary1, Gemma L Regan1, Stephen L Bearne2
1Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada.
Biochimica et biophysica acta. Proteins and proteomics
|August 3, 2023
概括
甲基六-5-酸 (MHP) 是一种新型的化学探针,广泛针对蛋白质. 这项研究确定了240种酶和132种非酶蛋白,揭示了MHP.
科学领域:
- 生物化学 生物化学
- 化学生物学 化学生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 基于活动的蛋白质概况 (ABPP) 对于研究酶活性和抑制剂开发至关重要.
- 甲基乙基酸单是选择性的电友,用于修改蛋白质中离子位点附近的核友.
研究的目的:
- 合成并利用甲基六-5-酸 (MHP) 作为用于广泛蛋白质向的化学探针.
- 为了确定易受甲基酸盐抑制的蛋白质.
主要方法:
- 在Paucimonas lemoignei的可溶性蛋白质上使用MHP进行基于活动的蛋白质分析.
- 通过点击化学进行生物化,使用斯特雷普塔维丁进行丰富,并进行LC-MS/MS分析.
- 在纯化重组β-酸脱酶 (PlHBDH) 和CTP合成酶 (EcCTPS) 上的MHP和甲基乙酸 (MAP) 失活和修饰位点的表征.
主要成果:
- 240个酶和132个非酶蛋白被MHP修改的鉴定.
- 与MAP相比,MHP的反应速度较慢,但具有更高的特异性.
- 在 PlHBDH 中,MHP 特别修改的活性部位残留物Ser 146,Lys 156和Lys 163.
- CTP,ATP和谷氨酸保护了EcCTPS免受MHP和MAP修改.
结论:
- MHP是一种有效的化学探针,用于识别可能被甲基酸抑制的蛋白质.
- 这项研究扩大了对用电友探头对蛋白质修饰的理解.
- MHP的特异性为向蛋白质分析和抑制剂设计提供了优势.
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