title: Sigma(s)-dependent regulation of yehZYXW, which encodes a putative osmoprotectant ABC transporter of Escherichia coli.
abstract: The Escherichia coli yehZYXW operon encodes a putative osmoprotectant uptake system of the ABC transporter family. yehZ is identical to osmF, an osmotically inducible gene identified previously. Construction and analysis of a yehZ-lacZ transcriptional fusion demonstrated that yehZ is inducible not only by osmolarity, but also upon entry into stationary phase. The osmotic and growth-phase regulations operate at a unique promoter, yehZp, and are totally dependent on the stress specific sigma factor sigma(s). The yehZYXW encoded ABC transporter appears as an additional element of the global stress response controlled by sigma(s).
authors.affiliation: Laboratoire de Microbiologie et Génétique Moléculaire, UMR 5100 CNRS, Université Toulouse III, 118, Route de Narbonne, 31062 Toulouse, France.
authors.forename: Claire
authors.initials: C
authors.lastname: Checroun
authors.forename: Claude
authors.initials: C
authors.lastname: Gutierrez
mesh_terms: D018528:ATP-Binding Cassette Transporters / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D000222:Adaptation, Physiological; D000595:Amino Acid Sequence; D019677:Artificial Gene Fusion; D001426:Bacterial Proteins / Q000378:metabolism*; D001483:Base Sequence; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism*; D029968:Escherichia coli Proteins / Q000235:genetics / Q000378:metabolism*; D015964:Gene Expression Regulation, Bacterial; D023061:Gene Order; D005798:Genes, Bacterial; D017930:Genes, Reporter; D008969:Molecular Sequence Data; D009876:Operon; D009994:Osmolar Concentration; D011401:Promoter Regions, Genetic; D012808:Sigma Factor / Q000378:metabolism*; D024363:Transcription Initiation Site; D001616:beta-Galactosidase / Q000235:genetics / Q000378:metabolism
chemical_list: D018528:ATP-Binding Cassette Transporters; D001426:Bacterial Proteins; D029968:Escherichia coli Proteins; D012808:Sigma Factor; C069567:sigma factor KatF protein, Bacteria; D001616:beta-Galactosidase