DNA repair protein RAD50
DNA repair protein RAD50 (1281-1289) is a synthetic peptide fragment derived from the C-terminal region of the RAD50 protein, a key component of the MRN (MRE11-RAD50-NBS1) complex involved in the detection and repair of DNA double-strand breaks. As an integral part of the cellular DNA damage response, RAD50 plays a crucial role in maintaining genomic stability by facilitating the recognition, tethering, and processing of DNA ends during homologous recombination and non-homologous end joining pathways. The 1281-1289 peptide segment represents a defined epitope that can be leveraged in molecular and cellular studies to elucidate protein-protein interactions, post-translational modifications, and regulatory mechanisms associated with DNA repair processes.
Epitope mapping: The RAD50 (1281-1289) peptide is frequently utilized as a defined epitope in immunological assays aimed at characterizing antibody specificity or mapping antigenic determinants within the RAD50 protein. By serving as a precise molecular probe, it enables researchers to identify and validate antibody binding sites, facilitating the development of highly specific reagents for immunoprecipitation, Western blotting, or immunofluorescence applications. Such studies are essential for advancing the understanding of RAD50's structural domains and their functional relevance within the DNA repair machinery.
Protein interaction studies: Researchers employ the 1281-1289 peptide fragment to investigate direct and indirect interactions between RAD50 and other DNA repair factors. By incorporating this peptide into pull-down assays or surface plasmon resonance experiments, it is possible to assess binding affinities, delineate contact regions, and explore the molecular basis of complex formation within the MRN complex or with accessory proteins. These insights are critical for dissecting the mechanistic underpinnings of DNA damage recognition and signaling pathways.
Post-translational modification analysis: The defined sequence of the RAD50 (1281-1289) peptide provides a valuable substrate for in vitro assays examining phosphorylation, acetylation, or other post-translational modifications that regulate RAD50 function. By using this peptide in kinase or acetyltransferase assays, scientists can identify specific modification sites, characterize enzymatic activity, and explore how such modifications influence protein-protein interactions or DNA binding capacity. Such studies contribute to the broader understanding of dynamic regulatory mechanisms governing the DNA damage response.
Antibody production: The 1281-1289 peptide is also employed as an immunogen for the generation of sequence-specific antibodies against RAD50. When conjugated to suitable carrier proteins, it can elicit robust immune responses in host animals, enabling the production of polyclonal or monoclonal antibodies that recognize the C-terminal domain of RAD50. These antibodies are invaluable tools for the detection, quantification, and localization of RAD50 in a variety of experimental systems, supporting research into the spatial and temporal dynamics of DNA repair processes.
Assay development: The synthetic peptide corresponding to the 1281-1289 region of RAD50 serves as a standardized reagent in the development and optimization of biochemical assays targeting the DNA repair pathway. Its well-defined structure and functional relevance make it suitable for use as a positive control, calibration standard, or competitive inhibitor in high-throughput screening platforms. Such applications accelerate the identification of novel modulators of DNA repair and facilitate the evaluation of small molecule inhibitors or protein-based therapeutics in preclinical research settings.
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