通过工程微生物生物制造具有治疗意义的康德罗伊硫酸C的生物制造
Aditi Dey Tithi1,2, Hana Zeghal1,2, Yuefan Song1
1Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York 12180, United States.
ACS synthetic biology
|February 23, 2026
概括
研究人员设计了一种细菌酶,以产生高纯度的氏丁硫酸盐C (CS-C),这是连接和神经组织的重要分子. 这种无动物的方法提供了一个可持续的平台,用于生物制造这个重要的糖氨酸氨基.
科学领域:
- 生物化学 生物化学
- 葡萄糖生物学 葡萄糖生物学
- 蛋白质工程是指蛋白质工程.
背景情况:
- 氏丁硫酸盐C (CS-C) 是一种关键的糖氨酸甘油,具有特定的6-O-硫化模式,对组织结构和信号传递至关重要.
- 了解和生产CS-C对于研究和治疗应用至关重要.
研究的目的:
- 在大肠杆菌中实现人类氏素6-O-硫转移酶-1 (C6ST-1) 的第一个功能表达,以实现无细胞CS-C生物合成.
- 开发一个可持续的,没有动物的平台来生产高纯度的CS-C.
主要方法:
- C6ST-1的结构指导蛋白质工程,包括跨膜截断和稳定突变.
- 在大肠杆菌Origami B (DE3) 和Shuffle T7 Express菌株中表达工程C6ST-1.
- 反应条件 (pH,温度,离子,辅因子) 和酶硫化试验的优化.
主要成果:
- 一种可溶和具有催化活性的C6ST-1变体被成功生成并表达在大肠杆菌中.
- 优化的条件使得多达67%的氏体 (CS-O) 硫化为CS-C,经SAX-HPLC验证.
- 动力学和分子动力学分析表明,在工程突变物中,基质亲和力和催化效率得到改善.
结论:
- 建立了一个可持续的,没有动物的平台,用于高纯度CS-C的生物制造.
- 展示了一个可通用的策略,用于为细菌表达设计真核细胞硫转移酶.
- 工程酶为CS-C生产和研究提供了有价值的工具.
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