Cys-Pexiganan is a cysteine-modified variant of pexiganan, enabling disulfide-mediated dimerization or conjugation. Its amphipathic structure supports membrane association in model systems. Researchers examine redox-dependent structural changes and activity profiles. Applications include antimicrobial-peptide engineering, conjugation chemistry, and membrane-interaction studies.
CAT No: Z10-101-169
Cys-Pexiganan is a synthetic peptide derivative designed to harness the antimicrobial properties of magainin analogs, characterized by the inclusion of a cysteine residue that enables unique functionalization and structural versatility. As an amphipathic peptide, it exhibits a strong affinity for bacterial membranes, making it a valuable tool in the study of host-defense mechanisms and membrane-active peptides. Its sequence modifications confer enhanced stability and facilitate targeted conjugation strategies, broadening its relevance in peptide engineering and biochemical research. The compound's robust activity profile and adaptable structure have positioned it as a versatile reagent for investigating peptide-membrane interactions, developing novel biomolecular constructs, and advancing antimicrobial research.
Antimicrobial research: Cys-Pexiganan serves as a prominent model for studying the mechanisms of peptide-based antimicrobial agents. Its amphipathic structure and membrane-disruptive activity allow researchers to dissect the molecular interactions between cationic peptides and microbial lipid bilayers. By employing this peptide in microbial susceptibility assays and membrane permeabilization studies, investigators can elucidate the determinants of selective toxicity and resistance mechanisms, providing critical insights for the development of next-generation antimicrobial compounds.
Peptide-membrane interaction studies: The unique sequence and amphipathic character of this peptide make it an ideal probe for examining the biophysical properties of peptide-lipid interactions. Researchers utilize it in model membrane systems, such as lipid vesicles and supported bilayers, to assess parameters like binding affinity, membrane insertion, and induced permeability. These studies contribute to a deeper understanding of the structural requirements for membrane disruption and the role of peptide conformation in biological activity.
Peptide modification and conjugation: Incorporation of a cysteine residue at the N-terminus of Pexiganan enables site-specific conjugation to various molecular tags, fluorophores, or carrier proteins via thiol-based chemistries. This property is particularly advantageous in the design of labeled analogs for imaging, tracking, and quantification in cellular and biochemical assays. The ability to generate customized peptide conjugates expands the utility of Cys-Pexiganan in mechanistic studies and assay development, supporting a wide range of experimental workflows.
Structure-activity relationship (SAR) analysis: The modular design of this peptide facilitates systematic investigations into the relationship between sequence modifications and biological function. By employing it as a scaffold, researchers can introduce targeted mutations or chemical modifications and assess their impact on antimicrobial potency, stability, and selectivity. These SAR studies not only inform the design of improved peptide therapeutics but also advance the broader field of peptide engineering by identifying key determinants of functional activity.
Peptide synthesis and analytical standards: Cys-Pexiganan is frequently employed as a reference compound in peptide synthesis protocols and analytical method development. Its defined sequence and physicochemical properties render it suitable for validating synthetic strategies, optimizing purification processes, and calibrating analytical instruments such as HPLC and mass spectrometry. Utilization as a standard supports quality control and reproducibility in peptide production, ensuring reliable outcomes in research and development settings.
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