Abstract
Characterization of genetic circuits and biosynthetic pathways in different hosts always requires promoter substitution and redesigning. Here, a strong, broad-spectrum promoter, Pbs, for Escherichia coli, Bacillus subtilis, and Saccharomyces cerevisiae was constructed, and it was incorporated into the minimal E.coli-B.subtilis-S.cerevisiae shuttle plasmid pEBS (5.8 kb). By applying a random mutation strategy, three broad-spectrum promoters Pbs1, Pbs2, and Pbs3, with different strengths were generated and characterized. These broad-spectrum promoters will expand the synthetic biology toolbox for E.coli, B.subtilis, and S.cerevisiae.
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