title: areCBA is an operon in Acinetobacter sp. strain ADP1 and Is controlled by AreR, a sigma(54)-dependent regulator.
abstract: The areCBA genes in Acinetobacter sp. strain ADP1, determining growth on benzyl alkanoates, are shown to be transcribed as a single operon and regulated by areR, which encodes a regulatory protein of the NtrC/XylR family. Assays of the Are enzymes and of two insertions of lacZ as a reporter gene have shown that the operon is induced by benzyl acetate, benzyl alcohol, and benzaldehyde, as well as 2- and 4-hydroxybenzyl acetates and benzyl propionate and butyrate. Two adjacent sites of transcriptional initiation were 97 and 96 bp upstream of the start codon for areC, near a sigma(54)-dependent -12, -24 promoter. Inactivation of areR and rpoN (for RNA polymerase sigma(54)) drastically reduced growth rates on the Are substrates and induction of the operon.
authors: School of Biological Sciences, University of Wales Bangor, Bangor, Gwynedd LL57 2UW, Wales, United Kingdom.
authors: R M
authors: RM
authors: Jones
authors: P A
authors: PA
authors: Williams
mesh_terms: D000150:Acinetobacter / Q000201:enzymology* / Q000235:genetics / Q000254:growth & development; D001426:Bacterial Proteins / Q000235:genetics* / Q000378:metabolism; D001483:Base Sequence; D001593:Benzyl Compounds / Q000378:metabolism; D004268:DNA-Binding Proteins; D012321:DNA-Directed RNA Polymerases / Q000235:genetics / Q000378:metabolism*; D004950:Esterases / Q000235:genetics / Q000378:metabolism; D015964:Gene Expression Regulation, Bacterial; D005809:Genes, Regulator / Q000235:genetics*; D008969:Molecular Sequence Data; D009876:Operon / Q000235:genetics*; D010088:Oxidoreductases / Q000235:genetics / Q000378:metabolism; D051877:RNA Polymerase Sigma 54; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012808:Sigma Factor / Q000235:genetics / Q000378:metabolism*
chemical_list: D001426:Bacterial Proteins; D001593:Benzyl Compounds; D004268:DNA-Binding Proteins; D012808:Sigma Factor; D010088:Oxidoreductases; D012321:DNA-Directed RNA Polymerases; D051877:RNA Polymerase Sigma 54; D004950:Esterases