Baculoviral IAP repeat-containing protein 5 (97-111)

Baculoviral IAP repeat-containing protein 5 (97-111) is a synthetic peptide fragment derived from the inhibitor of apoptosis protein (IAP) family, specifically corresponding to a defined region of BIRC5, also known as survivin. As a biochemically significant peptide, it encompasses a sequence within the baculoviral IAP repeat (BIR) domain, a structural motif critical for protein-protein interactions involved in cellular apoptosis regulation. Its unique sequence properties and defined origin render it highly relevant for research focused on cell death pathways, signaling cascades, and the functional dissection of IAP family proteins. The peptide's design enables targeted studies of molecular mechanisms underlying apoptosis inhibition, making it a valuable reagent for biochemical, structural, and cellular investigations.

Peptide functional studies: Researchers utilize the 97-111 fragment of BIRC5 to probe the role of the BIR domain in modulating protein interactions that govern apoptotic signaling. By introducing this peptide into in vitro assays or cellular models, scientists can dissect the specific contributions of this region to survivin's interaction with caspases or other regulatory partners. Such studies help clarify how the BIR domain mediates anti-apoptotic activity, providing critical insight into the molecular determinants of cell survival and death.

Protein-protein interaction analysis: The defined sequence of this peptide makes it an ideal tool for mapping binding interfaces involved in survivin-associated complexes. It can serve as a competitive inhibitor or molecular probe in pull-down assays, co-immunoprecipitation studies, or surface plasmon resonance experiments to identify and characterize proteins that interact with the 97-111 region. This approach facilitates the identification of novel binding partners and the elucidation of interaction networks central to cell fate regulation.

Peptide-based assay development: The fragment supports the creation of custom biochemical assays designed to monitor the activity or inhibition of IAP-related pathways. By incorporating the peptide into fluorescence polarization, ELISA, or other binding assays, researchers can quantify the affinity of small molecules, antibodies, or proteins for the BIR domain. Such assays are essential for screening modulators of survivin function and for validating molecular targets in apoptosis research.

Antibody generation and validation: The 97-111 peptide serves as a well-defined immunogen for the production of sequence-specific antibodies against survivin. These antibodies, raised using the peptide as an antigen, are invaluable for applications such as Western blotting, immunoprecipitation, or immunofluorescence, where precise recognition of the BIR domain is required. The peptide also provides a standard for validating antibody specificity and sensitivity in various immunoassays.

Structural and conformational studies: Synthetic access to the 97-111 segment allows for detailed biophysical analysis of the BIR domain's structural properties. Techniques such as circular dichroism, NMR spectroscopy, or X-ray crystallography can be employed to investigate the conformational dynamics of this region in isolation or in complex with binding partners. These studies yield fundamental knowledge about the folding, stability, and interaction surfaces of IAP repeat domains, informing broader understanding of apoptosis regulation at the molecular level.

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