工程细菌基合光活化腺酸环酶用于增强光遗传cAMP调制
Qianzhao Xu1, Arend Vogt2, Fabian Frechen3
1Department of Biochemistry, University of Bayreuth, 95447 Bayreuth, Germany.
Journal of molecular biology
|September 1, 2023
概括
研究人员开发了一种新的红光激活光遗传工具DmPAC,它可以增强对细胞过程的控制. 这一进步为生物应用提供了优越的红光灵敏度.
科学领域:
- 视觉遗传学 视觉遗传学
- 分子生物学分子生物学
- 生物化学 生化学
背景情况:
- 光受体使基于光的细胞功能控制成为可能.
- 现有的光遗传工具通常缺乏红光的效率,红光能很好地穿透组织.
- 基于细菌基基的系统提供红色/远红色光传感能力.
研究的目的:
- 设计新型光激活腺环酶 (PACs),对红光有反应.
- 改善第二信使信号通路的光遗传控制.
- 为了研究细菌染体受体设计,以提高光敏度.
主要方法:
- 在PAC中进行同源重组以交换光传感器单元.
- 工程细菌色光传感器模块.
- 修改光受体的PHY舌部区域.
主要成果:
- 开发了DmPAC,一种新型的PAC,在红灯下循环酶活性增加了40倍.
- DmPAC的性能超过了以前的红灯响应PAC的性能.
- 对PHY舌头的修改改变了红色和远红色光反应.
结论:
- 使用红光对第二信使信号进行先进的光遗传控制.
- DmPAC及其衍生物使哺乳动物细胞中循环核酸路径的红光操纵成为可能.
- 提供了关于细菌菌体信号传递和受体设计的见解.
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