Death-associated protein kinase 2
DAPK2 protein (1-9) is a synthetic peptide fragment corresponding to the N-terminal amino acid residues 1 through 9 of the Death-Associated Protein Kinase 2 (DAPK2). As a member of the DAPK family, DAPK2 is a serine/threonine kinase implicated in the regulation of apoptosis, autophagy, and cellular stress responses. The (1-9) fragment represents a defined sequence critical for studying the structural and functional motifs of the kinase's N-terminus, making it a valuable tool in peptide-based research and mechanistic biochemistry. Its precise sequence and chemical accessibility support a range of experimental applications, particularly those focused on protein-protein interactions, post-translational modification mapping, and kinase signaling pathways.
Peptide mapping: The DAPK2 (1-9) peptide serves as a reliable standard or probe in peptide mapping experiments, facilitating the identification and characterization of N-terminal motifs within the full-length kinase or related protein constructs. By incorporating this fragment into mass spectrometry workflows or chromatographic analyses, researchers can accurately verify sequence integrity, map proteolytic cleavage sites, and distinguish post-translationally modified states in DAPK2 and homologous proteins.
Protein interaction studies: As an epitope-mimicking sequence, the DAPK2 (1-9) peptide is frequently employed in assays designed to elucidate molecular recognition events involving the N-terminus of DAPK2. It can be used in pull-down assays, surface plasmon resonance, or fluorescence polarization studies to quantify binding affinities and specificity of interaction partners, such as regulatory proteins or peptide-binding domains, thereby advancing the understanding of DAPK2's role in cellular signaling complexes.
Kinase substrate specificity assays: The defined sequence of the DAPK2 (1-9) peptide enables its use as a substrate or competitive inhibitor in kinase assays. Researchers can utilize it to probe the substrate recognition properties of DAPK2 itself or related kinases, assess the effects of point mutations, or screen for modulators that influence phosphorylation efficiency. Such applications are essential for dissecting the molecular determinants of kinase-substrate interactions and for the rational design of targeted inhibitors.
Antibody development and validation: The synthetic peptide corresponding to the N-terminal residues of DAPK2 is a valuable antigen for generating sequence-specific polyclonal or monoclonal antibodies. These antibodies can be used for immunoblotting, immunoprecipitation, or immunofluorescence studies aimed at detecting endogenous or recombinant DAPK2. The (1-9) peptide also serves as a control antigen for validating antibody specificity, reducing background, and confirming epitope recognition in a variety of immunoassays.
Phosphorylation site analysis: The DAPK2 (1-9) fragment is particularly well-suited for investigating phosphorylation dynamics at the N-terminus of DAPK2. Synthetic versions of the peptide, with or without site-specific phosphorylation, can be utilized to calibrate analytical techniques such as mass spectrometry, to generate phospho-specific antibodies, or to study the functional consequences of N-terminal phosphorylation on DAPK2's activity and regulatory interactions. This targeted approach supports detailed mechanistic studies of kinase regulation and signal transduction pathways involving DAPK2.
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