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MprF-mediated daptomycin resistance

Christoph M Ernst1, Andreas Peschel2

  • 1Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA; Department of Molecular Biology and Center for Computational and Integrative Biology, Massachusetts General Hospital, Boston, Massachusetts, USA; The Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA.

International Journal of Medical Microbiology : IJMM
|June 12, 2019
PubMed

Insights

Daptomycin resistance in MRSA involves the Multiple Peptide Resistance Factor (MprF). New research clarifies how small nucleotide polymorphisms (SNPs) in MprF contribute to daptomycin resistance, offering a unified model for future studies.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Drug Resistance

Background:

  • Daptomycin is crucial for treating Methicillin-Resistant Staphylococcus aureus (MRSA) infections.
  • The exact mechanism of daptomycin action and resistance is not fully understood.
  • Small nucleotide polymorphisms (SNPs) in the Multiple Peptide Resistance Factor (MprF) gene are linked to daptomycin resistance.

Purpose of the Study:

  • To elucidate the role of MprF SNPs in daptomycin resistance.
  • To reconcile conflicting data on MprF activity and resistance phenotypes.
  • To propose a new, harmonized model for MprF-mediated daptomycin resistance.

Main Methods:

  • Analysis of isogenic mutants.
  • Structural insights into MprF.
  • Biochemical investigations.

Main Results:

  • A new model explaining MprF-mediated daptomycin resistance has been developed.
  • This model integrates previously conflicting resistance phenotypes.
  • Recent structural data clarifies MprF function in resistance.

Conclusions:

  • The new model provides a framework for understanding daptomycin resistance.
  • Further biochemical studies are warranted to validate the proposed mechanism.
  • Understanding MprF function is key to combating daptomycin resistance in MRSA.
Keywords:
Antibiotic resistanceDaptomycinFlippaseMprF

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