Receptor tyrosine-protein kinase erbB-2 precursor (369-386)

Receptor tyrosine-protein kinase erbB-2 precursor (369-386) is a synthetic peptide corresponding to amino acid residues 369 to 386 of the erbB-2 (also known as HER2/neu) receptor. As a segment derived from a critical region of this well-characterized receptor tyrosine kinase, the peptide serves as a valuable tool for studying protein-protein interactions, post-translational modifications, and the structural biology of receptor signaling. The erbB-2 receptor plays a pivotal role in cellular growth and differentiation pathways, making its constituent peptides highly relevant for research into signal transduction mechanisms and molecular recognition events. Utilization of this peptide fragment enables precise interrogation of the functional domains within the full-length protein and supports a variety of experimental strategies in molecular and cellular biology.

Epitope mapping: The peptide sequence corresponding to erbB-2 residues 369-386 is frequently used in epitope mapping studies aimed at characterizing antibody binding sites. By employing this defined fragment in immunoassays or peptide arrays, researchers can identify linear epitopes recognized by monoclonal or polyclonal antibodies. Such mapping is crucial for the development of highly specific antibody reagents, as well as for understanding immune recognition of the erbB-2 receptor in both research and diagnostic contexts.

Protein interaction studies: As a representative segment of the intracellular domain of erbB-2, this peptide is instrumental in elucidating protein-protein interactions involved in receptor signaling. It can be used as a bait in pull-down assays or surface plasmon resonance experiments to identify and characterize cellular proteins, adaptor molecules, or kinases that associate with this region. These studies help delineate the molecular networks that regulate erbB-2-mediated signal transduction and provide insight into the broader receptor tyrosine kinase family.

Phosphorylation analysis: The peptide serves as a model substrate for investigating kinase-mediated phosphorylation events. By incorporating it into in vitro kinase assays, researchers can assess the specificity and activity of various kinases that target the erbB-2 intracellular domain. This approach enables detailed mapping of phosphorylation sites, assessment of kinase inhibitors, and the study of downstream signaling cascades that depend on post-translational modification of erbB-2.

Antibody validation: The defined sequence of the erbB-2 (369-386) peptide is highly useful for validating the specificity and affinity of antibodies raised against the receptor. By employing the peptide in ELISA, western blot, or immunoprecipitation protocols, scientists can confirm that antibody reagents selectively recognize the intended region of the receptor. This validation is essential for ensuring the reliability of immunodetection assays in basic research, biomarker discovery, and reagent development.

Peptide-based assay development: The synthetic nature and precise definition of this peptide make it an excellent standard or control for assay development. It can be incorporated into quantitative or qualitative assays designed to monitor peptide-protein interactions, enzymatic modifications, or antibody binding. The use of well-characterized peptide standards contributes to reproducibility and accuracy in experimental workflows, supporting robust data generation in signal transduction and receptor biology research.

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