Light-switchable transcription factors obtained by direct screening in mammalian cells.
Light-switchable transcription factors obtained by direct screening in mammalian cells.
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DOI:
10.1038/s41467-023-38993-6
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发表时间:
2023-06-02
影响因子:
16.6
通讯作者:
Toettcher, Jared E.
中科院分区:
文献类型:
--
作者:
Zhu, Liyuan;McNamara, Harold M.;Toettcher, Jared E.
Optogenetic tools can provide fine spatial and temporal control over many biological processes. Yet the development of new light-switchable protein variants remains challenging, and the field still lacks general approaches to engineering or discovering protein variants with light-switchable biological functions. Here, we adapt strategies for protein domain insertion and mammalian-cell expression to generate and screen a library of candidate optogenetic tools directly in mammalian cells. The approach is based on insertion of the AsLOV2 photoswitchable domain at all possible positions in a candidate protein of interest, introduction of the library into mammalian cells, and light/dark selection for variants with photoswitchable activity. We demonstrate the approach’s utility using the Gal4-VP64 transcription factor as a model system. Our resulting LightsOut transcription factor exhibits a > 150-fold change in transcriptional activity between dark and blue light conditions. We show that light-switchable function generalizes to analogous insertion sites in two additional Cys6Zn2 and C2H2 zinc finger domains, providing a starting point for optogenetic regulation of a broad class of transcription factors. Our approach can streamline the identification of single-protein optogenetic switches, particularly in cases where structural or biochemical knowledge is limited. Light-switchable variants are only available for a limited subset of proteins and pathways. Here the authors adapt strategies for protein domain insertion and mammalian-cell expression to generate and screen a library of potential optogenetic tools directly in mammalian cells.
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DOI:
10.1126/science.aab2956
发表时间:
2016-02-12
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Bintu L;Yong J;Antebi YE;McCue K;Kazuki Y;Uno N;Oshimura M;Elowitz MB
通讯作者:
Elowitz MB
影响因子:
16.6
作者:
Duan L;Hope J;Ong Q;Lou HY;Kim N;McCarthy C;Acero V;Lin MZ;Cui B
通讯作者:
Cui B
DOI:
10.1126/science.aah3404
发表时间:
2016-12-16
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Dagliyan O;Tarnawski M;Chu PH;Shirvanyants D;Schlichting I;Dokholyan NV;Hahn KM
通讯作者:
Hahn KM
影响因子:
9.3
作者:
Chen SY;Osimiri LC;Chevalier M;Bugaj LJ;Nguyen TH;Greenstein RA;Ng AH;Stewart-Ornstein J;Neves LT;El-Samad H
通讯作者:
El-Samad H
影响因子:
16.6
作者:
Carrasco-Lopez, Cesar;Zhao, Evan M.;Avalos, Jose L.
通讯作者:
Avalos, Jose L.