Histone-lysine N-methyltransferase EZH2 (165-174)

Histone-lysine N-methyltransferase EZH2 (165-174) is a synthetic peptide fragment corresponding to amino acids 165 through 174 of the EZH2 protein, a key catalytic component of the Polycomb Repressive Complex 2 (PRC2). As an epigenetic regulator, EZH2 is responsible for catalyzing the methylation of lysine 27 on histone H3 (H3K27), a modification that plays a central role in chromatin remodeling and transcriptional silencing. The 165-174 region of EZH2 is of particular interest due to its involvement in protein-protein interactions, regulatory mechanisms, and post-translational modifications that influence the enzyme's activity and substrate specificity. Synthetic peptides derived from this segment serve as valuable biochemical tools for dissecting the molecular functions and regulatory dynamics of EZH2 in both basic and translational research contexts.

Epigenetic research: The EZH2 (165-174) peptide is widely used in studies focused on chromatin biology and gene regulation. By serving as a defined molecular probe, it enables researchers to investigate the specific contributions of this EZH2 segment to the assembly and function of PRC2 complexes. The peptide can be employed in pull-down assays, competition studies, or structural analyses to map binding interfaces and elucidate how this region mediates interactions with other PRC2 components or chromatin-associated factors. Such applications are instrumental in advancing the understanding of epigenetic silencing mechanisms and the dynamic regulation of histone methylation.

Enzyme-substrate interaction assays: In vitro assays utilizing the EZH2 (165-174) peptide provide a controlled system for examining substrate recognition and methyltransferase activity. Researchers can use the peptide as a substrate or competitor in methylation assays to characterize the catalytic properties of full-length EZH2 or mutant variants. These studies help delineate sequence requirements for methylation, identify determinants of enzymatic specificity, and support the design of selective inhibitors targeting the methyltransferase domain. The peptide's defined sequence makes it an ideal tool for kinetic measurements and mechanistic investigations.

Antibody validation and epitope mapping: The synthetic EZH2 (165-174) sequence is frequently employed as an antigen in the production and validation of antibodies specific to this region of the protein. By using the peptide in ELISA, Western blot, or immunoprecipitation protocols, researchers can assess antibody specificity, sensitivity, and cross-reactivity. Additionally, the peptide supports epitope mapping studies, enabling the precise localization of antibody binding sites within the EZH2 protein. These applications are essential for developing robust immunological reagents for epigenetics research.

Protein-protein interaction studies: The 165-174 peptide fragment is leveraged in biochemical assays to probe interactions between EZH2 and its regulatory partners. Using synthetic peptides as bait or competitors, researchers can identify binding motifs, characterize interaction affinities, and analyze the impact of post-translational modifications on protein complex assembly. Such studies are vital for unraveling the molecular networks that govern PRC2 recruitment, stability, and function within chromatin environments.

Peptide-based inhibitor development: The defined sequence of EZH2 (165-174) provides a template for the rational design of peptide-based inhibitors or modulators targeting EZH2-mediated methylation. By mimicking or disrupting native interactions, modified peptides derived from this region can be screened for their ability to interfere with PRC2 activity in biochemical assays. Insights gained from these approaches support the development of novel chemical probes and research tools for dissecting the role of EZH2 in gene silencing and epigenetic regulation.

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