DNA-dependent protein kinase catalytic subunit (2836-2844)

DNA-dependent protein kinase catalytic subunit (2836-2844) is a synthetic peptide fragment corresponding to amino acid residues 2836 to 2844 of the DNA-PKcs protein, a pivotal component in the DNA damage response pathway. As a highly conserved region within the catalytic subunit of DNA-dependent protein kinase (DNA-PKcs), this peptide is of significant interest in molecular biology and biochemistry research, particularly in studies related to DNA repair, signal transduction, and protein-protein interactions. The sequence represents a defined epitope that can serve as a valuable tool for dissecting the functional domains of DNA-PKcs and understanding its mechanistic role in cellular processes involving genomic maintenance and stability.

Epitope mapping: Researchers utilize this peptide as a defined epitope in studies aiming to map antibody recognition sites within DNA-PKcs. By employing the 2836-2844 fragment in immunological assays such as ELISA or western blotting, scientists can evaluate the specificity and affinity of antibodies raised against DNA-PKcs, facilitating the development of reliable detection reagents and improving the characterization of immune responses to this critical protein.

Protein-protein interaction studies: The peptide serves as a molecular probe for investigating interactions between DNA-PKcs and its binding partners. By incorporating the 2836-2844 sequence into binding assays, pull-down experiments, or surface plasmon resonance studies, researchers can elucidate how this region contributes to the assembly or modulation of DNA repair complexes. Such insights are vital for understanding the coordination of double-strand break repair and the broader signaling networks in which DNA-PKcs participates.

Kinase substrate analysis: As a segment of the catalytic subunit, the peptide is used in kinase assays to probe substrate recognition and phosphorylation events mediated by DNA-PKcs or related kinases. By serving as a defined substrate or competitive inhibitor, it enables detailed examination of kinase activity, substrate specificity, and the regulatory mechanisms that govern phosphorylation within the DNA damage response.

Peptide-based inhibitor development: The 2836-2844 fragment is valuable in the rational design and screening of peptide-based inhibitors targeting the DNA-PKcs protein. By mimicking a critical region of the catalytic subunit, this peptide can be employed in structure-activity relationship studies to identify modifications that disrupt protein function or modulate enzymatic activity, supporting the development of selective biochemical tools for pathway dissection.

Structural and functional domain analysis: The defined sequence allows researchers to dissect the structural organization of DNA-PKcs, particularly in relation to its catalytic core and interacting surfaces. By integrating the peptide into structural biology workflows, such as NMR or crystallography, scientists can gain insights into conformational dynamics, folding properties, and the contribution of specific residues to the overall function of the protein. This knowledge advances our understanding of DNA-PKcs architecture and its role in maintaining genomic integrity.

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