Real-time observation of light-controlled transcription in living cells
Skip to Next Section Gene expression is tightly regulated in space and time. To dissect this process with high temporal resolution, we introduce an optogenetic tool termed BLInCR (Blue Light-Induced Chromatin Recruitment) that combines rapid and reversible light-dependent recruitment of effector pro...
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| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
9 November 2017
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| In: |
Journal of cell science
Year: 2017, Jahrgang: 130, Heft: 24, Pages: 4213-4224 |
| ISSN: | 1477-9137 |
| DOI: | 10.1242/jcs.205534 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1242/jcs.205534 Verlag, Volltext: http://jcs.biologists.org/content/early/2017/11/08/jcs.205534 
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| Verfasserangaben: | Anne Rademacher, Fabian Erdel, Jorge Trojanowski, Sabrina Schumacher, Karsten Rippe |
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| 520 | |a Skip to Next Section Gene expression is tightly regulated in space and time. To dissect this process with high temporal resolution, we introduce an optogenetic tool termed BLInCR (Blue Light-Induced Chromatin Recruitment) that combines rapid and reversible light-dependent recruitment of effector proteins with a real-time readout for transcription. We used BLInCR to control the activity of a reporter gene cluster in the human osteosarcoma cell line U2OS by reversibly recruiting the viral transactivator VP16. RNA production was detectable ∼2 minutes after VP16 recruitment and readily decreased when VP16 dissociated from the cluster in the absence of light. Quantitative assessment of the activation process revealed biphasic activation kinetics with a pronounced early phase in cells treated with the histone deacetylase inhibitor SAHA. Comparison with kinetic models for transcription activation suggests that the gene cluster undergoes a maturation process when activated. We anticipate that BLInCR will facilitate the study of transcription dynamics in living cells. | ||
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