title: Dual genetic selection of synthetic riboswitches in Escherichia coli.
abstract: This chapter describes a genetic selection strategy to engineer synthetic riboswitches that can chemically regulate gene expression in Escherichia coli. Riboswitch libraries are constructed by randomizing the nucleotides that potentially comprise an expression platform and fused to the hybrid selection/screening marker tetA-gfpuv. Iterative ON and OFF selections are performed under appropriate conditions that favor the survival or the growth of the cells harboring the desired riboswitches. After the selection, rapid screening of individual riboswitch clones is performed by measuring GFPuv fluorescence without subcloning. This optimized dual genetic selection strategy can be used to rapidly develop synthetic riboswitches without detailed computational design or structural knowledge.
authors.affiliation: Department of Biomedical Engineering, University of California, Davis, Davis, CA, USA.
authors.forename: Yoko
authors.initials: Y
authors.lastname: Nomura
authors.forename: Yohei
authors.initials: Y
authors.lastname: Yokobayashi
mesh_terms: D052157:Aptamers, Nucleotide / Q000235:genetics; D001483:Base Sequence; D004926:Escherichia coli / Q000235:genetics*; D015964:Gene Expression Regulation, Bacterial; D015723:Gene Library; D005818:Genetic Engineering / Q000379:methods*; D010957:Plasmids / Q000235:genetics; D058928:Riboswitch
chemical_list: D052157:Aptamers, Nucleotide; D058928:Riboswitch