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Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
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  11. Targeting Mrsa Penicillin-binding Protein 2a: Structural Insights, Allosteric Mechanisms, And The Potential Of Adjuvant Inhibitors.
  1. Home
  3. Research Domains
  5. Biomedical And Clinical Sciences
  7. Medical Microbiology
  9. Medical Bacteriology
  11. Targeting Mrsa Penicillin-binding Protein 2a: Structural Insights, Allosteric Mechanisms, And The Potential Of Adjuvant Inhibitors.

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Targeting MRSA penicillin-binding protein 2a: structural insights, allosteric mechanisms, and the potential of adjuvant inhibitors.

Pedro C Rosado1, M Matilde Marques2, Gonçalo C Justino3

  • 1Centro de Química Estrutural, Institute of Molecular Sciences, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisbon, Portugal.

Biochemical Pharmacology
|June 8, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

Methicillin-resistant Staphylococcus aureus (MRSA) poses a significant threat due to its resistance to antibiotics. Targeting the allosteric site of penicillin-binding protein 2a (PBP2a) offers a promising strategy to restore antibiotic effectiveness.

Keywords:
Antibiotic adjuvantsMethicillin-resistant Staphylococcus aureusPenicillin-binding protein 2aProtein conformational dynamics

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Area of Science:

  • Microbiology
  • Drug Discovery
  • Structural Biology

Background:

  • Methicillin-resistant Staphylococcus aureus (MRSA) is a major cause of hospital-acquired infections with high mortality rates.
  • MRSA's resistance to beta-lactam antibiotics stems from the mecA gene, encoding penicillin-binding protein 2a (PBP2a).
  • PBP2a's low affinity for beta-lactams allows continued cell wall synthesis, enabling bacterial survival.

Purpose of the Study:

  • To review the role of PBP2a in mediating MRSA resistance to beta-lactam antibiotics.
  • To focus on the conformational changes and allosteric mechanisms underlying PBP2a-mediated resistance.
  • To explore potential modulation of PBP2a by ligand interactions for novel therapeutic strategies.

Main Methods:

  • Literature review focusing on PBP2a structure-function relationships.
β-lactam resistance
  • Analysis of conformational dynamics and allosteric regulation of PBP2a.
  • Examination of ligand interactions influencing PBP2a inhibition.

    • Main Results:

    • PBP2a undergoes conformational changes, adopting a closed state inaccessible to beta-lactams.
    • An allosteric site, distinct from the active site, regulates these resistance-conferring conformational alterations.
    • Ligand interactions can critically influence PBP2a inhibition by modulating its conformational dynamics.

    Conclusions:

    • Understanding PBP2a's allosteric regulation is crucial for developing new therapeutic approaches.
    • Targeting the PBP2a allosteric site with novel adjuvants can restore beta-lactam efficacy against MRSA.
    • This strategy holds promise for combating MRSA infections and overcoming antibiotic resistance.