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All metabolic activities operate within a narrow pH range that is controlled by the CO 2 -bicarbonate buffering system. We hypothesized that pH could serve as surrogate signal to monitor and respond to the physiological state. By functionally rewiring the human proton-activated cell-surface receptor TDAG8 to chimeric promoters, we created a synthetic signaling cascade that precisely monitors...
The biosynthesis of non-ribosomal peptides, many of which have pharmaceutical activities, is an evolutionary privilege of microorganisms. Capitalizing on the universal set of the Streptomyces lavendulae non-ribosomal peptide synthase BpsA and the Streptomyces verticillus 4′-phosphopantetheinyl transferase Svp, we have engineered Escherichia coli as well as mammalian cells, including human stem cells,...
Artificial RNA riboswitches – apart from protein-based gene regulation systems, which have been known about for a long time – have become increasingly important in biotechnology and synthetic biology. Aptamer-controlled hammerhead ribozymes (so-called aptazymes) have been shown to be a versatile platform for the engineering of novel gene regulators. Since aptazymes are cis-acting elements that are...
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