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© Research
Publication : Molecular microbiology

Structural and functional diversity among bacterial interspersed mosaic elements (BIMEs)

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Molecular microbiology - 01 Apr 1994

Bachellier S, Saurin W, Perrin D, Hofnung M, Gilson E

Link to Pubmed [PMID] – 8057840

Mol. Microbiol. 1994 Apr;12(1):61-70

Palindromic units (PU or REP) were defined as 40-nucleotide DNA sequences which are highly repeated in the genome of several members of the Enterobacteriaceae. They were shown to be a constituent of the bacterial interspersed mosaic element (BIME), in which they are associated with other repetitive sequences. We report here that Escherichia coli PU sequences contain three motifs (Y, Z1 and Z2), leading to the definition of two BIME families. The BIME-1 family, highly conserved over 145 nucleotides, contains two PUs (motifs Y and Z1). The BIME-2 family contains a variable number of PUs (motifs Y and Z2). We present evidence, using band shift experiments, that each PU motif binds DNA gyrase with a different affinity. This suggests that the two families are functionally distinct.

http://www.ncbi.nlm.nih.gov/pubmed/8057840