title: Staphylococcus aureus SH1000 and 8325-4: comparative genome sequences of key laboratory strains in staphylococcal research.
abstract: OBJECTIVE
  To provide comparative genome sequence data for two related model strains of Staphylococcus aureus (SH1000 and 8325-4) that are used extensively in laboratory research.
  
  
  RESULTS
  Comparative genome sequencing was used to identify genetic differences between Staph. aureus SH1000 and the fully genome-sequenced ancestral strain, Staph. aureus NCTC 8325. PCR amplification and DNA sequencing were employed to determine which of the genetic polymorphisms identified were also present in Staph. aureus 8325-4, a direct derivative of 8325 and the parent strain of SH1000. Aside from known genetic differences between these strains, Staph. aureus SH1000 harboured 15 single-nucleotide polymorphisms compared with 8325 (of which 12 were also found in 8325-4), and a 63-bp deletion upstream of the spa gene not present in either 8325 or 8325-4.
  
  
  CONCLUSIONS
  Staphylococcus aureus SH1000 and 8325-4 contain a number of genetic polymorphisms relative to the progenitor strain of the lineage (8325) and to each other.
  
  
  CONCLUSIONS
  The comparative genome sequences of SH1000 and 8325-4 presented here define the genotypes of two key strains in staphylococcal laboratory research and reveal genetic polymorphisms that may impact their phenotypic properties.
authors.affiliation: Antimicrobial Research Centre and Institute of Molecular and Cellular Biology, University of Leeds, Leeds, UK. a.j.oneill@leeds.ac.uk
authors.forename: A J
authors.initials: AJ
authors.lastname: O'Neill
mesh_terms: D001483:Base Sequence; D004269:DNA, Bacterial / Q000737:chemistry* / Q000235:genetics*; D016680:Genome, Bacterial; D008969:Molecular Sequence Data; D017354:Point Mutation; D011110:Polymorphism, Genetic; D017422:Sequence Analysis, DNA; D017384:Sequence Deletion; D013211:Staphylococcus aureus / Q000235:genetics*
chemical_list: D004269:DNA, Bacterial