Multi-chromatic control of mammalian gene expression and signaling

Müller, Konrad ; Engesser, Raphael ; Schulz, Simon ; Steinberg, Thorsten ; Tomakidi, Pascal ; Weber, Cornelia C. ; Ulm, Roman ; Timmer, Jens ; Zurbriggen, Matias D. ; Weber, Wilfried

In: Nucleic Acids Research, 2013, vol. 41, no. 12, p. e124-e124

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    Summary
    The emergence and future of mammalian synthetic biology depends on technologies for orchestrating and custom tailoring complementary gene expression and signaling processes in a predictable manner. Here, we demonstrate for the first time multi-chromatic expression control in mammalian cells by differentially inducing up to three genes in a single cell culture in response to light of different wavelengths. To this end, we developed an ultraviolet B (UVB)-inducible expression system by designing a UVB-responsive split transcription factor based on the Arabidopsis thaliana UVB receptor UVR8 and the WD40 domain of COP1. The system allowed high (up to 800-fold) UVB-induced gene expression in human, monkey, hamster and mouse cells. Based on a quantitative model, we determined critical system parameters. By combining this UVB-responsive system with blue and red light-inducible gene control technology, we demonstrate multi-chromatic multi-gene control by differentially expressing three genes in a single cell culture in mammalian cells, and we apply this system for the multi-chromatic control of angiogenic signaling processes. This portfolio of optogenetic tools enables the design and implementation of synthetic biological networks showing unmatched spatiotemporal precision for future research and biomedical applications