Abstract
A green-light-regulated gene expression system derived from Synechocystis sp. PCC 6803 was constructed and introduced into the marine cyanobacterial strain Synechococcus sp. NKBG 15041c. The regulation system was evaluated using gfp uv as a reporter gene under red-light illumination and under simultaneous red- and green-light illumination. Expression of the reporter gene was effectively repressed under red-light illumination and increased over 10-fold by illuminating with green light. Control vectors missing either the ccaS sensor histidine kinase gene or the ccaR response regulator gene showed no detectable induction of GFPuv expression. Green-light induction of gfp uv expression was further confirmed by quantitative reverse transcription PCR. The constructed system was effective at regulating the recombinant expression of a target gene using green light in a marine cyanobacterial strain that does not naturally possess such a green-light regulation system. Thus, constructed green-light-regulated gene expression system may be used as a core platform technology for the development of marine cyanobacterial strains in which bioprocesses will be regulated by light.
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Acknowledgments
This work was supported financially by the Core Research of Evolutional Science & Technology program (CREST) from the Japan Science and Technology Agency (JST).
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No conflict of interest.
Authors’ Contribution
AB and KA carried out the experiments. AB, KA, SF, and KS designed the experiments. AB, KA, SF, KK, and KS performed the data analysis and wrote the manuscript. All authors approved the final manuscript.
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Badary, A., Abe, K., Ferri, S. et al. The Development and Characterization of an Exogenous Green-Light-Regulated Gene Expression System in Marine Cyanobacteria. Mar Biotechnol 17, 245–251 (2015). https://doi.org/10.1007/s10126-015-9616-1
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DOI: https://doi.org/10.1007/s10126-015-9616-1