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Adenosine phosphonate inhibitors of lipid II: alanyl tRNA ligase MurM from Streptococcus pneumoniae

Elena Cressina1, Adrian J Lloyd, Gianfranco De Pascale

  • 1Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK.

Bioorganic & Medicinal Chemistry Letters
|June 6, 2007
PubMed

Insights

Researchers developed novel inhibitors targeting MurMN/FemABX enzymes, crucial for high-level penicillin resistance in gram-positive bacteria. These phosphonate transition state analogues represent a significant advancement in combating antibiotic resistance.

Area of Science:

  • Biochemistry
  • Microbiology
  • Medicinal Chemistry

Background:

  • High-level penicillin resistance in gram-positive bacteria poses a significant threat to public health.
  • The MurMN/FemABX enzyme family plays a critical role in peptidoglycan biosynthesis, a target for antibiotics.
  • Understanding resistance mechanisms is crucial for developing new therapeutic strategies.

Purpose of the Study:

  • To identify and characterize inhibitors of the MurMN/FemABX family of tRNA-dependent ligases.
  • To explore novel therapeutic approaches against penicillin-resistant gram-positive bacteria.

Main Methods:

  • Synthesis of adenosine and 2'-deoxyadenosine phosphonate transition state analogues.
  • Biochemical assays to evaluate inhibitory activity against MurMN/FemABX ligases.
  • Characterization of enzyme kinetics and inhibition mechanisms.

Main Results:

  • Adenosine and 2'-deoxyadenosine phosphonate transition state analogues were identified as potent inhibitors.
  • These compounds represent the first reported inhibitors for the MurMN/FemABX enzyme family.
  • The inhibitors effectively target a key step in peptidoglycan synthesis essential for bacterial survival.

Conclusions:

  • The developed phosphonate analogues are promising lead compounds for novel antibiotics.
  • Targeting MurMN/FemABX ligases offers a viable strategy to overcome high-level penicillin resistance.
  • Further research is warranted to develop these inhibitors into clinically effective drugs.

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