Wilms tumor protein (235-243)

Wilms tumor protein (235-243) is a synthetic peptide fragment derived from the Wilms tumor protein (WT1), a zinc finger transcription factor implicated in cellular growth, differentiation, and apoptosis. This specific nonapeptide sequence corresponds to amino acids 235 through 243 of the WT1 protein, an epitope region known for its immunogenic properties and relevance in tumor biology. As a well-characterized peptide, it serves as a valuable molecular tool in the study of protein-protein interactions, antigen presentation, and immune recognition, particularly in the context of cancer research and immunology. Its defined sequence and biochemical stability make it suitable for a range of experimental applications where precise molecular targeting is required.

Immunological research: The WT1 (235-243) peptide is widely employed in immunological assays to investigate T cell responses against tumor-associated antigens. Its defined epitope is recognized by cytotoxic T lymphocytes (CTLs), making it an essential reagent for mapping antigen-specific immune responses in vitro. By incorporating this peptide into ELISPOT, intracellular cytokine staining, or tetramer staining protocols, researchers can quantify and characterize T cell populations reactive to WT1, providing insights into mechanisms of tumor immune surveillance and the development of immunotherapeutic strategies.

Cancer antigen discovery: As a segment of a well-established tumor-associated antigen, this peptide is instrumental in studies aimed at identifying novel cancer epitopes and elucidating the immunogenic landscape of malignancies. Researchers utilize it to validate the presentation of WT1-derived peptides by major histocompatibility complex (MHC) molecules on cancer cells. Such investigations are fundamental for understanding antigen processing and presentation pathways, as well as for the rational design of peptide-based cancer vaccines or adoptive cell therapies.

Peptide-MHC binding studies: The nonapeptide format of WT1 (235-243) makes it ideal for assessing binding affinities and stability with various MHC class I alleles. These studies are crucial for determining the peptide's compatibility with specific human leukocyte antigen (HLA) types, informing both basic immunogenetics research and the selection of peptide candidates for immune monitoring. Quantitative binding assays and structural analyses using this peptide facilitate the prediction and validation of T cell epitopes relevant to population-specific immune responses.

Synthetic peptide controls: In experimental immunology and peptide-based assay development, this WT1 fragment serves as a reliable positive control. Its consistent sequence and established immunogenicity allow it to be used as a benchmark in T cell activation assays, cytotoxicity tests, and peptide pool screenings. Employing it as a standard control supports assay validation and optimization, ensuring reproducibility and comparability of results across different experimental systems.

Epitope mapping: The defined sequence of WT1 (235-243) is valuable in detailed epitope mapping studies aimed at dissecting the minimal peptide regions required for T cell recognition. By systematically comparing its activity with overlapping or truncated peptides, researchers can delineate critical amino acid residues involved in immune recognition. Such studies advance the understanding of antigen specificity, cross-reactivity, and the determinants of immunodominance within the WT1 protein, supporting the development of refined immunotherapeutic targets and diagnostic tools.

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