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FEMS Microbiol Lett. 1999 Jan 1;170(1):199-209.

Characterization of the Acinetobacter baumannii Fur regulator: cloning and sequencing of the fur homolog gene.

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1
Bacteriology Laboratory, A. Calmette Hospital, Centre Hospitalier RĂ©gional et Universitaire, Lille, France. cdaniel@u.washington.edu

Abstract

Growth kinetics, siderophore activity and iron-regulated bacterial proteins of Acinetobacter baumannii BM2580 were studied in iron-restricted and iron-supplemented chemically defined media. Iron-regulated outer membrane proteins of 75 kDa and 80 kDa were expressed under iron-restricted conditions. Cloning and sequencing of the complete iron-uptake regulatory (fur) gene from A. baumannii BM2580 is reported for the first time. This gene is preceded by a single autoregulated promoter whose -10 region overlaps the Fur binding site. The open reading frame identified encodes a polypeptide consisting of 145 amino acids. The fur gene is followed by a divergent open reading frame coding for the C-terminus of a putative PilU protein. Sequence analysis indicates that the Fur protein of A. baumannii was 63% identical to the Escherichia coli Fur protein.

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