Influenza NP (147-155) is a Kd restricted epitope from influenza nucleoprotein.
Influenza NP 147-155 is a synthetic peptide fragment derived from the nucleoprotein (NP) of the influenza virus, specifically corresponding to amino acid residues 147 through 155. As a highly conserved epitope within the viral NP, this peptide plays a pivotal role in immunological and virological research. Its sequence is recognized by cytotoxic T lymphocytes (CTLs) in various host species, making it a valuable tool for studying host-pathogen interactions, viral antigen processing, and adaptive immune responses. The biochemical properties and defined sequence of this peptide enable precise investigation of cellular mechanisms underlying influenza infection and immunity, supporting a wide range of experimental applications in molecular virology and immunology.
Epitope Mapping: The NP 147-155 peptide is extensively utilized in epitope mapping studies to identify and characterize T cell recognition sites within influenza nucleoproteins. By presenting this defined sequence to immune cells in vitro, researchers can delineate the specific residues critical for major histocompatibility complex (MHC) binding and T cell receptor interaction. This approach aids in understanding antigenic determinants that drive immune specificity, facilitating the rational design of vaccines and immunodiagnostic assays targeting influenza.
T Cell Activation Assays: In immunological research, the peptide serves as a robust reagent for stimulating antigen-specific cytotoxic T lymphocytes in both human and animal model systems. When loaded onto antigen-presenting cells or used in peptide pulsing protocols, it enables precise measurement of T cell activation, cytokine secretion, and cytolytic activity. These assays are instrumental for dissecting cellular immune responses to influenza, evaluating immunogenicity of candidate vaccines, and monitoring memory T cell populations following infection or immunization.
Vaccine Development Research: The defined sequence and immunodominant nature of NP 147-155 make it a strategic component in preclinical vaccine development efforts. Researchers employ this peptide to assess the efficacy of novel vaccine platforms in eliciting cellular immunity, particularly CD8+ T cell responses. By incorporating it into immunogenicity studies, investigators can compare the performance of different vaccine formulations and adjuvants, providing critical data for optimizing vaccine design and advancing translational research on influenza prevention.
MHC Binding and Structural Studies: The peptide is widely used in biochemical and structural analyses focused on peptide-MHC interactions. Its well-characterized binding affinity to specific MHC class I alleles enables detailed studies using techniques such as surface plasmon resonance, X-ray crystallography, and computational modeling. These investigations contribute to a deeper understanding of antigen presentation pathways, peptide-MHC stability, and the structural basis of immune recognition, informing both basic immunology and applied biotherapeutics research.
Assay Development and Standardization: The reproducible nature and immunological relevance of NP 147-155 support its use as a calibration standard or positive control in various immunoassays, including ELISPOT, intracellular cytokine staining, and tetramer-based flow cytometry. By providing a consistent and well-defined stimulus, the peptide enhances assay reliability, facilitates cross-laboratory comparisons, and supports the development of standardized protocols for influenza-specific immune monitoring. This utility is particularly valuable in collaborative research settings and large-scale immunological studies.
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