FAST kinase domain-containing protein 1 isoform 1 (497-514)

FAST kinase domain-containing protein 1 isoform 1 (497-514) is a synthetic peptide fragment derived from the C-terminal region of the human FASTKD1 protein. As a segment encompassing amino acids 497 to 514, this peptide represents a functionally relevant portion of a mitochondrial protein implicated in RNA processing and mitochondrial homeostasis. Its sequence specificity and structural features make it a valuable tool for researchers investigating mitochondrial biology, post-translational modifications, and protein-protein interactions within the context of cellular energy regulation and gene expression.

Peptide mapping: In proteomics and structural biology, this peptide fragment serves as a reference standard for peptide mapping experiments. By providing a defined sequence corresponding to the C-terminal region of FASTKD1, it enables mass spectrometry-based identification and quantification of endogenous or recombinant protein isoforms. Such applications are critical for characterizing protein expression patterns, validating antibody specificity, and supporting the development of targeted proteomic assays.

Antibody validation: The 497-514 peptide is frequently employed as an immunogen or as a positive control in antibody validation workflows. Its defined sequence allows for the generation and specificity testing of antibodies directed against FASTKD1, particularly those targeting the C-terminal domain. Utilizing this peptide in immunoassays or Western blotting facilitates the assessment of antibody selectivity, cross-reactivity, and binding affinity, which are essential parameters in reliable immunodetection.

Protein interaction studies: The synthetic peptide can be utilized in pull-down assays, surface plasmon resonance, or other biophysical methods to investigate protein-protein interactions involving the C-terminal domain of FASTKD1. By mimicking a discrete region of the native protein, it provides a platform to screen for interacting partners, map binding interfaces, or analyze the effects of post-translational modifications on molecular recognition events. Such studies contribute to a deeper understanding of mitochondrial signaling pathways and regulatory networks.

Phosphorylation analysis: As FASTKD1 is subject to regulatory phosphorylation, the 497-514 peptide can be used as a substrate or standard in kinase assays and phosphoproteomics experiments. Researchers can employ the peptide to identify potential phosphorylation sites, study kinase-substrate relationships, or calibrate analytical methods for detecting phosphorylated residues. These applications are instrumental in elucidating dynamic signaling events that modulate mitochondrial function and cellular adaptation.

Epitope mapping: The defined sequence of the peptide fragment supports epitope mapping studies aimed at localizing antibody binding sites within FASTKD1. By systematically testing the reactivity of monoclonal or polyclonal antibodies with this peptide, researchers can delineate linear epitopes, optimize antigen design, and improve the specificity of immunoassays. Such insights are valuable for both basic research and the development of high-quality reagents for mitochondrial protein analysis.

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