Mechanism of Action
Membrane Disruption
Arenicin adopts a beta-hairpin conformation stabilized by a disulfide bond between Cys3 and Cys20. The amphipathic structure allows it to insert into bacterial membranes, forming pores or causing membrane dissolution. This mechanism is selective for bacterial membranes due to their high anionic lipid content.
Intracellular Targets
Beyond membrane disruption, arenicin may translocate into cells and interfere with intracellular targets including nucleic acids and protein synthesis machinery. This multi-target activity reduces the likelihood of resistance development.
Research Summary
Antibacterial Activity
PreclinicalArenicin-1 demonstrates potent activity against gram-positive and gram-negative bacteria, including S. aureus, E. coli, and P. aeruginosa with MIC values in the low micromolar range. Analogs with improved selectivity and reduced hemolysis have been developed for pharmaceutical applications.
Drug Design Template
PreclinicalThe compact disulfide-stabilized beta-hairpin scaffold of arenicin has been used as a template for rational antibiotic design. Modified analogs with substitutions at key positions show improved therapeutic indices and stability against proteolytic degradation.
Calculate your Arenicin dose Vial strength, BAC water, exact syringe draw in IU. Free, no signup. Open Calc →
Research Protocols
| Goal | Dose | Frequency | Route |
|---|---|---|---|
| In vitro MIC testing | 1-16 uM | Single | Aqueous solution |
| Membrane disruption studies | 2-8 uM | Single | Liposome models |
Arenicin is research-only. No established human protocols exist.
Interactions
Safety Profile
Arenicin-1 shows hemolytic activity at higher concentrations, limiting direct therapeutic use. Structural optimization has reduced this liability in analogs. Toxicity profiles are under investigation in preclinical models. No human safety data available.
References
- [1]Ovchinnikova TV et al. (2004). Arenicin, an antimicrobial peptide from lugworm Arenicola marina, forms a secondary amphipathic structure in membrane-mimicking environments. FEBS Letters, 577(1-2), 209-214.
- [2]Shenkarev ZO et al. (2011). Spatial structure, self-association, and membrane interactions of the antimicrobial peptide arenicin. Biochemistry, 50(28), 6255-6265.