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Mastoparan-S from Sphodromantis viridis exhibits antimicrobial activity by disrupting bacterial membranes

Jonggwan Park1, Seulbi Lee2, Da Dam Kang2

  • 1Department of Bioinformatics, Kongju National University, Kongju, 32588, Republic of Korea.

AMB Express
|July 3, 2025
PubMed

Insights

Mastoparan-S, an antimicrobial peptide from praying mantis, shows potent antibacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa. This peptide disrupts bacterial membranes and inhibits biofilm formation, offering a promising alternative to conventional antibiotics.

Area of Science:

  • Biochemistry
  • Microbiology
  • Immunology

Background:

  • Antimicrobial resistance necessitates novel therapeutic strategies.
  • Antimicrobial peptides (AMPs) offer broad-spectrum activity and unique mechanisms.
  • Mastoparan-S, an AMP from Sphodromantis viridis, has reported antimicrobial properties.

Purpose of the Study:

  • To evaluate the antibacterial activity and mechanism of action of chemically synthesized Mastoparan-S.
  • To assess Mastoparan-S against Staphylococcus aureus and Pseudomonas aeruginosa.
  • To determine Mastoparan-S's cytotoxicity and effect on biofilm formation.

Main Methods:

  • Chemical synthesis of Mastoparan-S.
  • Antibacterial assays against S. aureus and P. aeruginosa.
  • Cytotoxicity and hemolytic activity assays using RAW264.7 and HaCaT cells.
  • Biofilm inhibition assays.
  • Mechanism of action studies focusing on bacterial membrane disruption.

Main Results:

  • Mastoparan-S demonstrated potent antibacterial activity against both S. aureus and P. aeruginosa.
  • No significant cytotoxicity or hemolytic activity was observed in tested cell lines.
  • Mastoparan-S effectively inhibited biofilm formation in both bacterial species.
  • The mechanism of action involves disruption of the bacterial membrane.

Conclusions:

  • Chemically synthesized Mastoparan-S is a potent antibacterial agent against S. aureus and P. aeruginosa.
  • Mastoparan-S exhibits a favorable safety profile with no observed cytotoxicity or hemolytic activity.
  • Mastoparan-S's ability to inhibit biofilm formation and disrupt bacterial membranes highlights its therapeutic potential.
  • Mastoparan-S represents a promising candidate for developing new treatments against resistant bacterial infections.
Keywords:
Pseudomonas aeruginosaStaphylococcus aureusAntimicrobial peptideMastoparan-S

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