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© Research
Publication : Research in microbiology

Palindromic unit highly repetitive DNA sequences exhibit species specificity within Enterobacteriaceae

Member: Sophie Bachellier-Bassi
Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Research in microbiology - 01 Nov 1990

Gilson E, Bachellier S, Perrin S, Perrin D, Grimont PA, Grimont F, Hofnung M

Link to Pubmed [PMID] – 2092362

Res. Microbiol. 1990 Nov-Dec;141(9):1103-16

Palindromic units (PU, or REP for repetitive extragenic palindrome) constitute a family of DNA sequences of 40 nucleotides which is highly repeated in the genome of Escherichia coli. We analysed the presence of PU sequences in 99 different bacterial genomes by cross-hybridization. When PU sequences were used as a probe, only DNA from Enterobacteriaceae closely related to E. coli exhibited an appreciable hybridization signal: Shigella sonnei, Shigella boydii, Salmonella enteritica serotype Typhimurium, Citrobacter freundii and Levinea malonatica. Furthermore, these bacteria could be divided into two groups which corresponded to a slight difference in their PU sequence: the E. coli group includes S. sonnei and S. boydii; the S. enteritica serotype Typhimurium group includes C. freundii and L. malonatica.