Brevinin-1
Amphibian antimicrobial peptide with potent activity against drug-resistant bacteria and anticancer properties.
Chemical Identity
| Property | Value |
|---|---|
| Molecular Weight | ~2700 Da |
| Peptide Class | Cyclic Lipopeptide (Frog AMP) |
| Structure | Cyclic with C-terminal disulfide loop |
| Origin | Various Rana species |
Structure
Brevinin-1 peptides are a family of cyclic antimicrobial peptides from frog skin (Rana species). They contain a characteristic C-terminal disulfide loop (Cys-Lys/Arg…Cys) that distinguishes them from linear AMPs. The cyclic structure enhances proteolytic stability and membrane activity.
Mechanism of Action
Brevinins disrupt bacterial membranes through their amphipathic structure, with the C-terminal cyclic loop facilitating membrane insertion. They also have anticancer activity, selectively killing cancer cells through membrane disruption and intracellular mechanisms including mitochondrial membrane depolarization.
Clinical Applications
- Antimicrobial research: Lead compounds for AMP drug development
- Anticancer research: Selective toxicity against tumor cells
- Anti-biofilm: Active against bacterial biofilms
- Structure-activity studies: Understanding cyclic AMP mechanisms
Pharmacology
- Spectrum: Broad (gram-positive, gram-negative, fungi, cancer cells)
- Stability: Enhanced by cyclic structure
- Hemolysis: Some members are hemolytic
- Selectivity: Tunable through sequence modification
References
- Morikawa, N., et al. (1992). Brevinin-1: a novel antimicrobial peptide. Biochemical and Biophysical Research Communications, 189, 184-190.
- Conlon, J.M. (2004). The therapeutic potential of antimicrobial peptides from frog skin. Reviews in Medical Microbiology, 15, 91-100.
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