Reversible and Tunable Photoswitching of Protein Function through Genetic Encoding of Azobenzene Amino Acids in Mammalian Cells.

Reversible and Tunable Photoswitching of Protein Function through Genetic Encoding of Azobenzene Amino Acids in Mammalian Cells.
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DOI:
10.1002/cbic.201800226
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发表时间:
2018-10-18
期刊:
Chembiochem : a European journal of chemical biology
影响因子:
--
通讯作者:
Deiters A
Deiters A
中科院分区:
其他
文献类型:
--
作者:
Luo J;Samanta S;Convertino M;Dokholyan NV;Deiters A

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The genetic encoding of three different azobenzene phenylalanines with different photochemical properties was achieved in human cells using an engineered pyrrolysyl tRNA/tRNA synthetase pair. In order to demonstrate reversible light-control of protein function, azobenzenes were site-specifically introduced into firefly luciferase. Computational strategies were applied to guide selection of potential photoswitchable sites that lead to a reversibly controlled luciferase enzyme. Direct reversible photoswitching of enzymatic function in live cells has been accomplished through genetically encoded photoswitchable amino acids. In addition, the new azobenzene analogs provide enhanced thermal stability, high photoconversion, and responsiveness to visible light. These small molecule photoswitches can reversibly photocontrol protein function with excellent spatiotemporal resolution and preferred sites for incorporation can be computationally determined, thus providing a new tool for investigating biological processes.
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