Imaging RNA polymerase III transcription using a photostable RNA-fluorophore complex.
Imaging RNA polymerase III transcription using a photostable RNA-fluorophore complex.
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DOI:
10.1038/nchembio.2477
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发表时间:
2017-11
影响因子:
14.8
通讯作者:
Jaffrey SR
中科院分区:
文献类型:
--
作者:
Song W;Filonov GS;Kim H;Hirsch M;Li X;Moon JD;Jaffrey SR
Quantitative measurement of transcription rates in live cells is important for revealing mechanisms of transcriptional regulation. This is particularly challenging for measuring the activity of RNA polymerase III (Pol III), which transcribes growth-promoting small RNAs. To address this, we developed Corn, a genetically encoded fluorescent RNA reporter suitable for quantifying RNA transcription in cells. Corn binds and induces fluorescence of 3,5-difluoro-4-hydroxybenzylidene-imidazolinone-2-oxime, which resembles the fluorophore found in red fluorescent protein (RFP). Notably, Corn shows high photostability, enabling quantitative fluorescence imaging of mTOR-dependent Pol III transcription. Unlike actinomycin D, we found that mTOR inhibitors resulted in heterogeneous transcription suppression in individual cells. Quantitative imaging of Corn-tagged Pol III transcript levels revealed distinct Pol III transcription “trajectories” elicited by mTOR inhibition. Together, these studies provide an approach for quantitative measurements of Pol III transcription by direct imaging of Pol III transcripts containing a photostable RNA-fluorophore complex.
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DOI:
10.1126/science.1207339
发表时间:
2011-07-29
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Paige JS;Wu KY;Jaffrey SR
通讯作者:
Jaffrey SR
影响因子:
46.9
作者:
Nagai, T;Ibata, K;Miyawaki, A
通讯作者:
Miyawaki, A
影响因子:
5.3
作者:
SISODIA, SS;SOLLNERWEBB, B;CLEVELAND, DW
通讯作者:
CLEVELAND, DW
影响因子:
14.8
作者:
Huang, Hao;Suslov, Nikolai B.;Li, Nan-Sheng;Shelke, Sandip A.;Evans, Molly E.;Koldobskaya, Yelena;Rice, Phoebe A.;Piccirilli, Joseph A.
通讯作者:
Piccirilli, Joseph A.
影响因子:
4.8
作者:
Shor, Boris;Wu, Jiang;Yu, Ker
通讯作者:
Yu, Ker