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Membrane Active Peptides and Their Biophysical Characterization.

Fatma Gizem Avci1, Berna Sariyar Akbulut2, Elif Ozkirimli3

  • 1Bioengineering Department, Marmara University, Kadikoy, 34722 Istanbul, Turkey. gizemavci@gmail.com.

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Membrane active peptides, including antimicrobial peptides (AMPs) and cell-penetrating peptides (CPPs), show promise as pharmaceuticals. Advanced biophysical and computational methods reveal their interactions with cell membranes.

Keywords:
antimicrobial peptidesbiophysical characterizationcell-penetrating peptidesmembrane disruptionpeptide–lipid interactionsuptake mechanism

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Area of Science:

  • Biochemistry and Biophysics
  • Molecular Biology
  • Pharmacology

Background:

  • Membrane active peptides interact with cell membranes, causing lysis or facilitating cargo delivery.
  • Antimicrobial peptides (AMPs) and cell-penetrating peptides (CPPs) are key classes with increasing pharmaceutical relevance.
  • These peptides offer potential alternatives to conventional drugs.

Purpose of the Study:

  • To review recent advances in the experimental and computational investigation of membrane active peptides.
  • To highlight the mechanisms of action for AMPs and CPPs.
  • To emphasize the role of biophysical techniques in understanding peptide-membrane interactions.

Main Methods:

  • Utilized advanced biophysical techniques (optics, image processing) for high-resolution studies of peptide-membrane interactions.
  • Employed live imaging for single-cell and single-molecule analysis of peptide activity.
  • Applied molecular dynamics simulations to investigate peptide-lipid interactions at atomic detail.

Main Results:

  • Structural investigations reveal how membrane environments influence peptide conformations.
  • Live imaging visualizes peptide translocation and cellular entry dynamics.
  • Simulations provide atomic-level insights into peptide-membrane interactions and cell entry processes.

Conclusions:

  • Membrane active peptides, particularly AMPs and CPPs like melittin and pVEC, are crucial for biological functions.
  • Integrated experimental and computational approaches offer a comprehensive understanding of their mechanisms.
  • Continued research in this area holds significant potential for drug development.