PMID:2837762

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Citation

Koch, C, Vandekerckhove, J and Kahmann, R (1988) Escherichia coli host factor for site-specific DNA inversion: cloning and characterization of the fis gene. Proc. Natl. Acad. Sci. U.S.A. 85:4237-41

Abstract

The Escherichia coli (Es. coli) protein Fis (factor for inversion stimulation) stimulates site-specific DNA inversion of the G segment in phage Mu by binding to a recombinational enhancer. By using synthetic oligonucleotides deduced from the amino-terminal amino acid sequence, we have cloned the gene (termed fis) encoding this specific DNA-binding protein. The DNA sequence shows that the Fis protein is basic and contains 98 amino acids. A helix-turn-helix sequence motif characteristic of many DNA-binding proteins is located at the carboxyl-terminal end of the protein. By marker exchange, we have constructed an insertion mutation of fis. Fis is nonessential for Es. coli growth; however, inversion of the G segment of a Mu prophage was not detected in the fis mutant. The fis gene is located between 71 and 72 min on the Es. coli genetic map.

Links

PubMed PMC280402

Keywords

Amino Acid Sequence; Base Sequence; Carrier Proteins/genetics; Chromosome Inversion; Cloning, Molecular; DNA Restriction Enzymes; DNA, Bacterial/genetics; DNA-Binding Proteins/genetics; Escherichia coli/genetics; Escherichia coli Proteins; Factor For Inversion Stimulation Protein; Genes; Genes, Bacterial; Integration Host Factors; Molecular Sequence Data

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