Recruitment of penicillin-binding protein PBP2 to the division site of Staphylococcus aureus is dependent on its transpeptidation substrates

Mariana G. Pinho, Jeff Errington

Research output: Contribution to journalArticlepeer-review

120 Citations (Scopus)

Abstract

Staphylococcus aureus penicillin-binding protein PBP2 is an enzyme involved in the last stages of peptidoglycan assembly and is an important player in the mechanism of methicillin resistance of this pathogen. PBP2 localized to the division site but its recruitment to the forming division septum was prevented after acylation by oxacillin. The presence of the antibiotic did not affect FtsZ ring maintenance nor the localization of externalized peptidoglycan precursors. Delocalization of PBP2 was also observed when its pentapeptide substrate was eliminated by addition of D-cycloserine or blocked by addition of vancomycin. Taken together these observations suggest that PBP2 is recruited to the division site by binding to its substrate, which is localized at that place. In methicillin-resistant S. aureus, addition of oxacillin does not result in delocalization of PBP2 indicating that acylated PBP2 can be maintained in place by functional PBP2A, the central element of this resistance mechanism.

Original languageEnglish
Pages (from-to)799-807
Number of pages9
JournalMolecular Microbiology
Volume55
Issue number3
DOIs
Publication statusPublished - 1 Feb 2005

Keywords

  • vancomycin
  • cycloserine
  • FtsZ protein
  • meticillin
  • norfloxacin
  • oxacillin
  • penicillin binding protein 2a
  • peptidoglycan

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