Carcinoembryonic antigen-related cell adhesion molecule 5 (425-437)

Carcinoembryonic antigen-related cell adhesion molecule 5 (425-437) is a synthetic peptide fragment derived from the larger CEACAM5 protein, a member of the carcinoembryonic antigen family involved in cell adhesion, signaling, and intercellular communication. As a defined peptide sequence corresponding to amino acids 425 to 437 of CEACAM5, it serves as a valuable molecular tool in the study of protein-protein interactions, immune recognition, and the biochemical mechanisms underlying cell adhesion processes. Its sequence specificity and structural features make it particularly relevant for researchers investigating the functional domains of CEACAM5 and their role in cellular dynamics and molecular recognition events.

Epitope mapping: The 425-437 peptide fragment is widely utilized in epitope mapping studies to identify and characterize antibody binding sites on CEACAM5. By providing a defined sequence corresponding to a specific region of the parent protein, the peptide enables researchers to dissect the antigenic determinants recognized by monoclonal or polyclonal antibodies. This application is crucial for the development of antibody-based detection systems, as well as for the fundamental understanding of immune recognition mechanisms associated with the CEACAM family.

Protein-protein interaction studies: As a representative segment of the CEACAM5 extracellular domain, this peptide is instrumental in probing protein-protein interactions that govern cell adhesion and signaling. Researchers employ the 425-437 fragment in binding assays, surface plasmon resonance, and pull-down experiments to elucidate how this region contributes to the molecular interface between CEACAM5 and its ligands or interacting partners. Such studies enhance the mechanistic understanding of cell adhesion molecules in physiological and pathological contexts.

Immunoassay development: The defined sequence of the CEACAM5 (425-437) peptide allows for its use as a calibrator, standard, or capture antigen in immunoassay platforms. Its application in enzyme-linked immunosorbent assays (ELISAs), western blots, or bead-based assays supports the quantitative and qualitative detection of CEACAM5-specific antibodies or related immune factors in research samples. This approach is particularly valuable in assay optimization and validation, where specificity and reproducibility are paramount.

Peptide-based inhibitor screening: The 425-437 fragment is also leveraged in screening studies aimed at identifying small molecules, peptides, or other agents capable of modulating CEACAM5-mediated interactions. By serving as a target or competitor in binding assays, the peptide facilitates the discovery of novel inhibitors or modulators that may influence CEACAM5 function. Such investigations provide insight into the regulatory mechanisms of cell adhesion and may inform the design of next-generation research tools.

Structural and biophysical analysis: Finally, the sequence-defined nature of the peptide makes it suitable for structural and biophysical characterization using techniques such as circular dichroism spectroscopy, NMR, or computational modeling. These studies enable researchers to assess the conformational properties, secondary structure tendencies, and dynamic behavior of the 425-437 region, contributing to a more comprehensive understanding of CEACAM5's molecular architecture and functional domains. Collectively, the availability of this peptide fragment supports a broad spectrum of advanced research applications in cell biology, immunology, and protein chemistry.

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