设计一种高活性光敏合成酶,用于对c-di-GMP和生物膜动态的光遗传控制
Aloysius Teng1, Yidan Hu2, Bin Cao1,3
1Singapore Centre for Environmental Life Sciences Engineering and School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore.
ACS synthetic biology
|February 12, 2026
概括
研究人员设计了一种高度活跃的,对光有反应的酶,BphS-13,以控制细菌信号分子 bis(3'-5') - 循环二元格瓦诺辛单酸盐 (c-di-GMP). 这种工具为生物技术应用提供了精确的光遗传控制.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 生物技术是生物技术.
背景情况:
- 双3'-5') - 循环二元型瓜诺辛单酸盐 (c-di-GMP) 是一个关键的细菌第二信使,调节各种细胞过程.
- 控制细胞内c-di-GMP水平对于理解细菌信号和开发生物技术工具至关重要.
- 光遗传方法为生物过程提供精确的时空控制,包括c-di-GMP代谢.
研究的目的:
- 为光遗传学应用设计一种高度活性和光敏的c-di-GMP合成酶.
- 开发一种用于精确,光感应调节细菌c-di-GMP动态的工具.
- 为了证明工程酶在控制细菌生物膜形成中的实用性.
主要方法:
- 定向进化涉及易发生错误的PCR,体外同源重组和局部定向突变发生.
- 一种近红外 (NIR) 光激活的细菌菌素c-di-GMP合成酶 (BphS) 的工程.
- 工程变体 (BphS-13) 的迪加尼酸环酶 (DGC) 活性和光响应性的表征.
主要成果:
- 一个工程BphS变体,BphS-13,有13个突变,通过两轮的定向进化产生.
- 与原始BphS相比,BphS-13的DGC活性大约是原始BphS的13倍.
- BphS-13在对NIR光的反应中表现出严格调节的DGC活动,暗活动最小.
结论:
- BphS-13是一种高度活性和光敏的c-di-GMP合成酶,适合光遗传控制.
- 这种工程酶为操纵细菌信号和生物膜动态提供了强大的工具.
- BphS-13有可能在哺乳动物系统中未来应用,以精确控制基因表达.
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