Protein enabled homolog (443-451)

Protein enabled homolog (443-451) is a synthetic peptide fragment corresponding to amino acid residues 443 to 451 of the protein enabled homolog (ENAH), a member of the Ena/VASP family of actin regulatory proteins. This peptide represents a highly conserved region implicated in protein-protein interactions and cytoskeletal dynamics. As a defined sequence motif, it serves as a valuable molecular tool for dissecting the functional domains of ENAH and related signaling pathways. Researchers utilize such peptide fragments to investigate the structural and biochemical properties of larger protein complexes, making it an essential reagent in cell biology, structural biochemistry, and molecular signaling research.

Peptide interaction studies: The 443-451 fragment is commonly used to map binding interfaces and characterize the specificity of ENAH interactions with other proteins, especially those involved in actin filament assembly and regulation. By employing this peptide in pull-down assays, surface plasmon resonance, or fluorescence polarization experiments, researchers can quantify binding affinities and dissect the molecular determinants of Ena/VASP-mediated signaling pathways. Such studies are crucial for elucidating the mechanisms by which ENAH modulates cytoskeletal remodeling and cell motility.

Structural biology: As a well-defined sequence, the peptide facilitates structural investigations of ENAH and its complexes. Researchers frequently use it in crystallography or NMR spectroscopy to obtain high-resolution information on the conformational states of the ENAH binding domain. By providing a soluble, tractable fragment, the peptide enables detailed analysis of secondary structure, folding dynamics, and interaction surfaces that are otherwise challenging to study in the context of the full-length protein.

Kinase substrate profiling: The defined sequence of the 443-451 peptide makes it suitable for use as a substrate in kinase assays aimed at identifying post-translational modifications, such as phosphorylation, within the ENAH protein. By incorporating this peptide into in vitro kinase reactions, investigators can determine substrate specificity, map phosphorylation sites, and assess the regulatory impact of kinases on ENAH function. These insights contribute to a broader understanding of signal transduction networks involving actin-binding proteins.

Antibody generation and validation: The peptide serves as an immunogen for the development of sequence-specific antibodies targeting the ENAH 443-451 region. Such antibodies are valuable for applications in western blotting, immunoprecipitation, or immunofluorescence, where precise recognition of the ENAH domain is required. Additionally, the peptide is employed in antibody validation protocols to confirm specificity and minimize cross-reactivity, thereby enhancing the reliability of downstream assays.

Cell signaling pathway analysis: Researchers utilize the ENAH 443-451 peptide as a competitive inhibitor or functional probe in cellular assays designed to disrupt or mimic endogenous protein interactions. By introducing this fragment into cultured cells or cell-free systems, it is possible to modulate actin-regulatory pathways and assess the consequences on cell morphology, migration, or adhesion. Such functional studies provide mechanistic insights into the contribution of ENAH domains to dynamic cellular processes and facilitate the identification of potential modulatory compounds for research applications.

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