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Nucleic Acids Res. 2006;34(16):4642-52. Epub 2006 Sep 8.

Association of nucleoid proteins with coding and non-coding segments of the Escherichia coli genome.

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  • 1School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.


The Escherichia coli chromosome is condensed into an ill-defined structure known as the nucleoid. Nucleoid-associated DNA-binding proteins are involved in maintaining this structure and in mediating chromosome compaction. We have exploited chromatin immunoprecipitation and high-density microarrays to study the binding of three such proteins, FIS, H-NS and IHF, across the E.coli genome in vivo. Our results show that the distribution of these proteins is biased to intergenic parts of the genome, and that the binding profiles overlap. Hence some targets are associated with combinations of bound FIS, H-NS and IHF. In addition, many regions associated with FIS and H-NS are also associated with RNA polymerase.

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