Fig 1.

Identification of centromeric regions in the genome of Deinococcus radiodurans. The genome sequence of this bacterium was searched for the presence of typical parS elements, as reported previously for the P1 plasmid and chromosomal-type centromeres in Bacillus subtilis. (A) The inverted repeat boxes characteristic of parS elements were detected in chromosome I (Dp1) and chromosome II (Dp2). (B) Three putative centromeric regions similar to Bacillus subtilis-type chromosomal centromeres were detected in chromosome I and named segS1, segS2, and segS3. (C) These elements are distributed at different locations on circular chromosome I. The ParA1B1 (A1B1) operon is located upstream of the segS1 element, between bp 13333 and 15073.