Carcinoembryonic antigen-related cell adhesion molecule 5 (605-613)

Carcinoembryonic antigen-related cell adhesion molecule 5 (605-613) is a synthetic peptide fragment derived from the CEACAM5 protein, a member of the carcinoembryonic antigen family known for its role in cell adhesion, signaling, and tumorigenesis. As a defined sequence corresponding to amino acids 605 through 613 of the CEACAM5 molecule, this peptide serves as a valuable biochemical tool for dissecting the structural and functional properties of cell adhesion molecules in various research settings. Its relevance is underscored by the central role of CEACAM5 in modulating intercellular interactions, particularly in epithelial tissues and in the context of neoplastic transformation, making the peptide fragment highly pertinent for studies in molecular cell biology, cancer research, and immunology.

Epitope mapping: The peptide corresponding to residues 605-613 of CEACAM5 is widely utilized in epitope mapping studies to identify antibody binding sites and characterize immune recognition patterns. By providing a well-defined sequence, researchers can assess the specificity and affinity of monoclonal or polyclonal antibodies raised against CEACAM5, facilitating the development of highly selective immunoreagents. Such mapping efforts are crucial for advancing diagnostic assay design and for understanding the molecular determinants of antibody-antigen interactions in basic and translational research.

Immunoassay development: As a representative fragment of the CEACAM5 protein, this peptide is instrumental in the development and optimization of immunoassays, including ELISA, western blotting, and immunohistochemistry protocols. By serving as a positive control or as a competitive inhibitor in assay systems, it enables precise calibration and validation of antibody-based detection methods targeting CEACAM5. This application supports the generation of robust, reproducible data in studies focused on the quantification or localization of CEACAM5 in biological samples.

Peptide-protein interaction analysis: The 605-613 peptide segment of CEACAM5 provides a targeted approach for investigating protein-protein interactions involving the parent cell adhesion molecule. Researchers employ this peptide in binding assays to probe potential interaction partners, elucidate binding motifs, and dissect the molecular mechanisms underlying CEACAM5-mediated cell adhesion or signaling events. Such studies contribute to a deeper understanding of cellular communication and adhesion dynamics, particularly in the context of tumor cell biology.

T-cell epitope studies: The defined sequence of this peptide makes it suitable for T-cell epitope characterization, especially in research exploring immune recognition of tumor-associated antigens. By incorporating the peptide into ex vivo or in vitro assays, investigators can assess T-cell activation, cytokine release, or cytotoxic responses, thereby providing insights into the immunogenic properties of CEACAM5-derived fragments. This application is essential for advancing knowledge of tumor immunology and for supporting the rational design of immune monitoring tools.

Structural and functional analysis: The peptide fragment corresponding to CEACAM5 residues 605-613 can be utilized in structure-function studies to delineate the contribution of specific regions to the overall conformation and biological activity of the full-length protein. Synthetic peptides such as this allow for systematic mutagenesis, biophysical characterization, and computational modeling, enabling researchers to dissect the relationship between primary sequence, three-dimensional structure, and functional output. Such analyses are vital for unraveling the molecular basis of cell adhesion and signaling mediated by CEACAM family members.

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