TGF-beta receptor type-2 (131-139)

TGF-beta receptor type-2 (131-139) is a synthetic peptide fragment derived from the amino acid sequence corresponding to residues 131 to 139 of the transforming growth factor-beta (TGF-β) receptor type II. As a bioactive peptide, it represents a specific segment of the receptor's extracellular domain, making it a valuable molecular tool for dissecting protein-protein interactions, receptor signaling mechanisms, and the structural biology of TGF-β receptor complexes. Its defined sequence and structural attributes enable researchers to investigate the functional roles of this receptor region in modulating cellular responses to TGF-β, a cytokine crucial for cell growth, differentiation, and extracellular matrix regulation. The availability of this targeted peptide fragment supports advanced studies in cell signaling, peptide-receptor binding, and the development of analytical assays in the context of TGF-β pathway research.

Peptide mapping: The TGF-beta receptor type-2 (131-139) peptide is commonly utilized as a reference standard or probe in peptide mapping experiments to elucidate the structural and functional domains of the TGF-β receptor. By employing this fragment in mapping studies, researchers can identify critical amino acid residues involved in ligand binding or receptor dimerization, facilitating a deeper understanding of how the receptor's extracellular region contributes to signal transduction. Such insights are pivotal for the rational design of receptor-targeted probes and for advancing knowledge of TGF-β receptor architecture.

Protein-protein interaction studies: As a defined sequence from the receptor's extracellular domain, this peptide is highly suitable for investigating direct interactions with TGF-β ligands or other extracellular matrix proteins. By incorporating the peptide into binding assays, surface plasmon resonance, or co-immunoprecipitation protocols, scientists can assess the affinity and specificity of intermolecular contacts. These studies are essential for characterizing the molecular determinants of TGF-β signaling and for identifying potential sites of therapeutic intervention in fibrotic, oncogenic, or developmental pathways.

Receptor signaling pathway analysis: The 131-139 peptide fragment serves as a valuable molecular tool for dissecting downstream signaling events initiated by TGF-β receptor activation. By using this peptide to compete with native receptor binding or to modulate ligand-receptor interactions in cell-based assays, researchers can delineate the contribution of this extracellular segment to canonical and non-canonical TGF-β signaling cascades. Such applications help clarify the mechanistic basis of cellular responses, including growth inhibition, apoptosis, and differentiation, in various biological systems.

Epitope characterization: The defined sequence of this peptide makes it an excellent substrate for generating and validating antibodies specific to the extracellular domain of TGF-β receptor type II. By employing the peptide in immunization protocols or as a target in enzyme-linked immunosorbent assays (ELISA), researchers can produce monoclonal or polyclonal antibodies for use in protein detection, localization, and quantification studies. This approach supports the development of highly specific reagents for basic research, diagnostic assay development, and receptor biology investigations.

Analytical assay development: The TGF-beta receptor type-2 (131-139) peptide can be incorporated into various analytical platforms, including mass spectrometry-based quantification, high-performance liquid chromatography (HPLC), and biosensor assays. Its well-defined sequence and physicochemical properties enable accurate calibration, method validation, and quality control in studies targeting TGF-β receptor expression or post-translational modifications. Such applications are critical for ensuring the reliability and reproducibility of experimental workflows in both academic and industrial research settings.

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