Abstract
Aerobactin, a hydroxamate iron transport compound, is synthesized by some, but not all, Shigella species. Conjugation and hybridization studies indicated that the genes for the synthesis and transport of aerobactin are linked and are found on the chromosome of Shigella flexneri, S. boydii, and S. sonnei. The genes were not found in S. dysenteriae. A number of aerobactin synthesis mutants and transport mutants have been isolated. The most common mutations are deletions of the biosynthesis or biosynthesis and transport genes. The Shigella aerobactin genes share considerable homology with the E. coli ColV aerobactin genes. On the ColV plasmid and in the Shigella chromosome, the aerobactin genes are associated with a repetitive sequence which has been identified as IS1.
Publisher
American Society for Microbiology
Subject
Molecular Biology,Microbiology
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