c(phg-isoDGR-(NMe)k)

c(phg-isoDGR-(NMe)k) is a synthetic cyclic peptide designed to incorporate the isoDGR motif, a well-characterized integrin-binding sequence, within a conformationally constrained scaffold. The peptide features a cyclized structure containing phenylglycine (Phg) and a methylated lysine (NMeK), which together enhance its stability and affinity for specific integrin subtypes. This molecular configuration enables precise interrogation of integrin-mediated biological processes, making the compound highly relevant for studies in cell adhesion, migration, and extracellular matrix interactions. Researchers value such cyclic peptides for their improved resistance to proteolytic degradation and their ability to mimic or modulate protein-protein interactions in a controlled experimental context.

Integrin binding studies: As a cyclic peptide presenting the isoDGR motif, c(phg-isoDGR-(NMe)k) serves as a robust tool for probing integrin recognition and binding specificity, particularly with integrin subtypes such as αvβ3 and α5β1. Its conformational rigidity and enhanced affinity support detailed analyses of ligand-receptor interactions, aiding in the elucidation of molecular determinants that govern cell adhesion and signaling pathways. This makes the compound especially valuable for dissecting integrin-ligand dynamics in vitro and for screening novel integrin-targeted biomolecules.

Cell adhesion assays: The stability and bioactivity of this cyclic peptide render it suitable for use in cell adhesion experiments, where it can be immobilized on surfaces or incorporated into hydrogels to study integrin-mediated cell attachment and spreading. By selectively engaging integrin receptors, the compound enables researchers to distinguish between different cell populations based on integrin expression profiles, facilitating investigations into cellular responses to extracellular matrix cues and the development of integrin-selective substrates.

Peptide structure-activity relationship (SAR) analysis: c(phg-isoDGR-(NMe)k) is highly relevant for SAR studies focused on the isoDGR motif and its derivatives. Researchers can utilize this compound as a reference or starting point to systematically modify side chains, backbone cyclization, or methylation patterns, thereby elucidating the structural features that optimize integrin binding or biological activity. Such investigations are critical for the rational design of next-generation peptide ligands with tailored specificity and functional properties.

Peptide-based material engineering: The cyclic nature and defined bioactivity of this peptide make it a promising component in the functionalization of biomaterials. It can be conjugated to polymers, nanoparticles, or surface coatings to impart integrin-targeting capabilities, enabling the creation of advanced materials for use in biosensing, cell culture, or tissue engineering research. By incorporating the isoDGR motif into engineered surfaces, researchers can direct cell-material interactions with high precision, opening avenues for the development of bioactive scaffolds and diagnostic platforms.

Competitive binding and inhibition assays: The high-affinity integrin interaction profile of c(phg-isoDGR-(NMe)k) allows its application in competitive binding studies, where it can be used to evaluate the inhibitory potential of novel compounds or to map integrin recognition sites. By serving as a benchmark ligand, the peptide supports quantitative assessment of binding affinities and the identification of key residues involved in integrin engagement, thereby advancing the understanding of integrin-ligand competition and facilitating the screening of candidate antagonists for research purposes.

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