title: Novel screening methods--biosensors.
abstract: Biosensors offer exciting possibilities for improving cells or enzymes as biocatalysts for the synthesis of small molecules. We here review recent progress in the development and the screening applications of transcription-factor-based biosensors. An example is a cofactor-dependent biosensor which provides a generalizable screen for NADPH-dependent enzymes. Another example is the use of a biosensor in combination with recombineering for strain development, thereby expanding the genome engineering techniques to deliver directly bacteria producing small molecules of interest. Biosensor-based techniques in combination with fluorescence-activated cell sorting demonstrate that the gap regarding throughput capabilities of existing methods for the generation of genetic diversity and methods for the subsequent screening can be closed.
authors.affiliation: Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany. Electronic address: l.eggeling@fz-juelich.de.
authors.forename: Lothar
authors.initials: L
authors.lastname: Eggeling
authors.affiliation: Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Bott
authors.affiliation: Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Marienhagen
mesh_terms: D000818:Animals; D001419:Bacteria / Q000201:enzymology / Q000235:genetics; D055162:Biocatalysis; D015374:Biosensing Techniques / Q000379:methods*; D005434:Flow Cytometry; D006801:Humans; D009249:NADP / Q000378:metabolism
chemical_list: D009249:NADP