Open AccessInsertion Hot Spot for Horizontally Acquired DNA within a Bidirectional Small-RNA Locus in Salmonella enterica
Author(s) -
Roberto Balbontín,
Nara FigueroaBossi,
Josep Casadesús,
Lionello Bossi
Publication year - 2008
Publication title -
journal of bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.652
H-Index - 246
eISSN - 1067-8832
pISSN - 0021-9193
DOI - 10.1128/jb.00220-08
Subject(s) - biology , salmonella enterica , salmonella , locus (genetics) , dna , gene , escherichia coli , genetics , rna , microbiology and biotechnology , bacteria
In Escherichia coli and Salmonella enterica, RyeA and RyeB RNAs are encoded on opposite DNA strands at the same locus. We present evidence indicating that the last 23 bp of the ryeB gene, corresponding to an internal portion of the ryeA gene, served repeatedly as the integration site for exogenous DNA during Salmonella evolution and still act as an attachment site for present-day bacteriophages. Interestingly, ryeA sequence and expression are modified upon lysogenization.