Abstract:Gene autorepression is widely present in nature and is also employed in synthetic biology, partly to reduce gene expression noise in cells. Optogenetic systems have recently been employed for controlling gene expression levels in mammalian cells, but most have utilized activator-based proteins, neglecting negative feedback. Here, we engineer optogenetic negative-feedback gene circuits in mammalian cells to achieve noise-reduction for precise gene expression control. We build a toolset of these noise-reducing L… Show more
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