title: DNA sequence variability at the rplX locus of Bacillus subtilis.
abstract: The pattern and extent of DNA sequence variability at the rplX locus (encoding ribosomal protein L24) has been investigated in nine strains of Bacillus subtilis. Overall, there is a very low level of nucleotide diversity, even at silent sites, which is probably due to selection among synonymous codons. By analogy with Escherichia coli, there may also be some effect of the relative proximity of rplX to the chromosomal origin of replication. The small number of nucleotide substitutions are non-randomly distributed: all of the synonymous changes are in valine codons. From the sequence differences the strains can be divided into two groups, which are not coincident with their previous classification; this observation is consistent with recombination among strains.
authors.affiliation: Department of Genetics, Trinity College, Dublin, Ireland.
authors.forename: P M
authors.initials: PM
authors.lastname: Sharp
authors.forename: N C
authors.initials: NC
authors.lastname: Nolan
authors.forename: N
authors.initials: N
authors.lastname: ni Cholmain
authors.forename: K M
authors.initials: KM
authors.lastname: Devine
mesh_terms: D000595:Amino Acid Sequence; D001412:Bacillus subtilis / Q000145:classification / Q000235:genetics*; D001426:Bacterial Proteins / Q000235:genetics*; D001483:Base Sequence; D005075:Biological Evolution; D003062:Codon; D004269:DNA, Bacterial / Q000235:genetics*; D005798:Genes, Bacterial; D014644:Genetic Variation; D008969:Molecular Sequence Data; D012269:Ribosomal Proteins / Q000235:genetics*
chemical_list: D001426:Bacterial Proteins; D003062:Codon; D004269:DNA, Bacterial; D012269:Ribosomal Proteins; C036298:ribosomal protein L24