title: Characterization of the DNA- and metal-binding properties of Vibrio anguillarum fur reveals conservation of a structural Zn(2+) ion.
abstract: The ferric uptake regulator, Fur, represses iron uptake and siderophore biosynthetic genes under iron-replete conditions. Here we report in vitro solution studies on Vibrio anguillarum Fur binding to the consensus 19-bp Escherichia coli iron box in the presence of several divalent metals. We found that V. anguillarum Fur binds the iron box in the presence of Mn(2+), Co(2+), Cd(2+), and to a lesser extent Ni(2+) but, unlike E. coli Fur, not in the presence of Zn(2+). We also found that V. anguillarum Fur contains a structural zinc ion that is necessary yet alone is insufficient for DNA binding.
authors.affiliation: Department of Biochemistry and Molecular Biology, Oregon Health Sciences University, Portland, Oregon 97201-3098, USA.
authors.forename: E E
authors.initials: EE
authors.lastname: Zheleznova
authors.forename: J H
authors.initials: JH
authors.lastname: Crosa
authors.forename: R G
authors.initials: RG
authors.lastname: Brennan
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D002104:Cadmium / Q000494:pharmacology; D003035:Cobalt / Q000494:pharmacology; D004269:DNA, Bacterial / Q000378:metabolism; D004926:Escherichia coli / Q000378:metabolism; D005798:Genes, Bacterial; D008345:Manganese / Q000494:pharmacology; D008969:Molecular Sequence Data; D009532:Nickel / Q000494:pharmacology; D011485:Protein Binding; D012097:Repressor Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D016415:Sequence Alignment; D014733:Vibrio / Q000737:chemistry*; D015032:Zinc / Q000032:analysis* / Q000494:pharmacology
chemical_list: D001426:Bacterial Proteins; D004269:DNA, Bacterial; D012097:Repressor Proteins; C068477:ferric uptake regulating proteins, bacterial; D002104:Cadmium; D003035:Cobalt; D008345:Manganese; D009532:Nickel; D015032:Zinc