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煤气道工程的prolyl氧化酶重新编程细胞中低氧信号

Peter Windsor¹, Haiping Ouyang², Joseph A G da Costa¹

¹Department of Chemistry, University of Minnesota, Twin Cities, Minneapolis, MN 55455, United States.

Angewandte Chemie (International ed. in English)

|August 21, 2024

概括

研究人员设计了prolyl氧酶2 (PHD2) 酶,以增强细胞的氧气传感. 这种修改有效地重新编程了哺乳动物细胞中的缺氧反应和HIF信号通路.

科学领域:

生物化学生物化学
细胞生物学细胞生物学
分子生物学分子生物学

背景情况:

细胞通过复杂的机制感知和响应氧气 (O2) 水平.
酸酶2 (PHD2) 是一个关键的氧气传感器,对于调节细胞对低氧 (低O2) 的反应至关重要.

研究的目的:

通过设计氧气传感器PHD2.2,重新编程细胞缺氧信号.
调查PHD2的气体道在氧气感应和催化活性中的作用.

主要方法:

计算建模和蛋白质工程被用来识别和修改PHD2的气体道中的关键残留物.
用氧化 (NO) 作为替代气体进行动力停止流量测量,评估酶动力学.
用工程PHD2突变体感染HEK-293T哺乳动物细胞,以评估体内对缺氧诱导因子1-alpha (HIF-1α) 的影响.

主要成果:

在PHD2气体道的工程增强了氧气流向催化核的流量,增加了酶与二元原子气体的关联率.
与野生类型的PHD2相比,一个设计的PHD2突变体在化HIF-1α模仿的催化效率上呈现了9倍的增加.
在低氧条件下,工程PHD2突变物显著降低了哺乳动物细胞中的HIF-1α水平和下游低氧反应转录.

结论:

通过气工程激活PHD2代表了调节细胞低氧反应的新策略.
这种方法为重新编程细胞中缺氧诱导因子 (HIF) 信号提供了一条新的途径.

关键词:

蜂信号传输是如何实现的气体道气体道非黑米铁的非黑米铁传感氧气的传感器可以传感氧气.蛋白质设计蛋白质设计

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