使用可移除的O-链接β-N-乙糖胺策略正确折叠的富含硫化物蛋白的总化学合成
Wei-Wei Shi1, Chaowei Shi, Tong-Yue Wang1
1Tsinghua-Peking Center for Life Sciences, Ministry of Education Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, State Key Laboratory of Chemical Oncogenomics (Shenzhen), Department of Chemistry, Tsinghua University, Beijing 100084, China.
Journal of the American Chemical Society
|January 3, 2022
概括
化学家开发了一种新型可移除的糖化修饰 (RGM) 策略,以简化复杂的,富含硫化物蛋白质的合成. 这种方法稳定了折叠中间体,使得治疗性蛋白质如肝素和介质蛋白-5的有效生产成为可能.
科学领域:
- 生物化学
- 化学生物学
- 蛋白质化学
背景情况:
- 富含二硫化物蛋白在生物医学中具有价值,但由于折叠的复杂性,其合成具有挑战性.
- 目前生产正确折叠的富含二硫化物蛋白质的方法往往效率低下或难以扩展.
- 多重和链间二硫化键的精确形成对蛋白质功能至关重要.
研究的目的:
- 开发一种新的化学策略来有效合成正确折叠的富含硫化物蛋白质.
- 克服与含有多重二硫化键的复杂蛋白质结构相关的折叠挑战.
- 证明该策略在合成生物相关蛋白质中的实用性.
主要方法:
- 在Ser/Thr残留物中引入O结合的β-N-乙糖胺 (O-GlcNAc) 组以稳定折叠中间体.
- 使用O-GlcNAcase (OGA) 在蛋白质折叠后有效地去除O-GlcNAc组.
- 应用可移除的糖化修饰 (RGM) 策略来合成肝素和中白素-5 (IL-5).
主要成果:
- 该RGM策略显著提高了富含硫化物蛋白的折叠效率.
- 成功合成正确折叠的肝素,一个具有四个二硫化键的铁调节激素.
- 实现了第一个正确折叠的互白素-5 (IL-5),一个26kDa的同位素.
结论:
- 该RGM策略提供了正确折叠的蛋白质与复杂的二硫化键安排的化学合成的可靠方法.
- 这种方法有助于生产具有挑战性的蛋白质疗法和研究工具.
- 肝素和IL-5的成功合成突显了RGM策略在蛋白质工程和药物开发中的广泛适用性.
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