Israel Institute for Biological Research, PO Box 19, Nes Ziona 70200, Israel.
Integration host factor binds to a unique class of complex repetitive extragenic DNA sequences in Escherichia coli
Article first published online: 27 OCT 2006
Volume 10, Issue 1, pages 113–122, October 1993
How to Cite
Oppenheim, A. B., Rudd, K. E., Mendelson, I. and Teff, D. (1993), Integration host factor binds to a unique class of complex repetitive extragenic DNA sequences in Escherichia coli. Molecular Microbiology, 10: 113–122. doi: 10.1111/j.1365-2958.1993.tb00908.x
- Issue published online: 27 OCT 2006
- Article first published online: 27 OCT 2006
- Received 22 April, 1993; revised and accepted 18 June, 1993.
Interspersed repeated DNA sequences are characteristic features of both prokaryotic and eukaryotic genomes. REP sequences are defined as conserved repetitive extragenic palindromic sequences and are found in Escherichia coli, Salmonella typhimurium and other closely related enteric bacteria. These REP sequences may participate in the folding of the bacterial chromosome. In this work we describe a unique class of 28 conserved complex REP clusters, about 100bp long, in which two inverted REPs are separated by a singular integration host factor (IHF) recognition sequence. We term these sequences RIP (for repetitive IHF-binding palindromic) elements and demonstrate that IHF binds to them specifically. It is estimated that there are about 70 RIP elements in E. coli. Our analysis shows that the RIP elements are evenly distributed around the bacterial chromosome. The possible function of the RIP element is discussed.