NDLI: A mutation in a Rhodobacter capsulatus gene encoding an integration host factor-like protein impairs in vivo hydrogenase expression.

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A mutation in a Rhodobacter capsulatus gene encoding an integration host factor-like protein impairs in vivo hydrogenase expression.

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A mutation in a Rhodobacter capsulatus gene encoding an integration host factor-like protein impairs in vivo hydrogenase expression.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Toussaint, B. Bosc, C. Vignais, P. M. Richaud, P. Colbeau, A.
Description	Author Affiliation: Toussaint B ( Laboratoire de Biochimie Microbienne (Unité de Recherche Associée 1130 du Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale), Grenoble, France.);
Abstract	A gene capable of encoding a protein sharing 45% identical amino acids with the alpha subunit of the integration host factor (IHF) of Escherichia coli was isolated from the photosynthetic bacterium Rhodobacter capsulatus strain B10 by complementation of a hydrogenase-deficient (Hup-) mutant, IR4. A DNA fragment of 274 base pairs containing an IHF binding consensus sequence, isolated from the promoter region of the hydrogenase structural genes (hupSL), was shown by gel retardation assays to bind the IHF protein from E. coli. The product of the R. capsulatus gene was shown to bind specifically to the 274-base-pair DNA fragment from the hupSL promoter. By analogy to the E. coli himA gene, which encodes the alpha subunit of IHF, the gene complementing the IR4 mutant was named himA of R. capsulatus. The wild-type himA gene, cloned in plasmid pBO2, was introduced into the IR4 strain and shown to restore, in trans, hydrogenase activity and autotrophic growth in the mutant. In IR4, a C----T transition mutation had replaced Arg-8 by Cys-8. Gel mobility shifts of the 274-base-pair DNA fragment, not observed with the himA gene product of IR4, were restored with extracts from IR4(pBO2) cells, containing the himA gene on the recombinant plasmid pBO2.
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	23
Volume Number	88
Language	English
Publisher	National Academy of Sciences
Publisher Date	1991-01-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Bacterial Proteins Genetics Escherichia Coli Genes, Bacterial Hydrogenase Mutagenesis, Insertional Operon Rhodobacter Capsulatus Amino Acid Sequence DNA-Binding Proteins Gene Expression Regulation, Bacterial Genetic Complementation Test Integration Host Factors Macromolecular Substances Molecular Sequence Data Plasmids Promoter Regions, Genetic Restriction Mapping Enzymology Sequence Homology, Nucleic Acid Transcription, Genetic Comparative Study Multidisciplinary
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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