Telomerase reverse transcriptase (865-873)

Telomerase reverse transcriptase (865-873) is a synthetic peptide fragment corresponding to amino acids 865 through 873 of the human telomerase reverse transcriptase (hTERT) protein. As a segment derived from the catalytic subunit of telomerase, this peptide is of significant interest in studies of cellular aging, genomic stability, and cancer biology. Its sequence represents a defined epitope within the C-terminal region of hTERT, a domain implicated in telomerase assembly and function. The use of such peptides enables precise interrogation of protein-protein interactions, post-translational modifications, and immune recognition events associated with telomerase activity in eukaryotic cells.

Epitope mapping: Researchers frequently employ the 865-873 peptide fragment to delineate antibody binding sites within the hTERT protein. By providing a well-defined epitope, this peptide facilitates the identification and characterization of monoclonal and polyclonal antibodies specific to the C-terminal region of telomerase reverse transcriptase. Such mapping is essential for the development of highly specific immunoassays and for advancing the understanding of antibody recognition patterns in telomerase-related research.

Immunological assays: The peptide serves as a valuable tool in the design and optimization of enzyme-linked immunosorbent assays (ELISA), western blotting, and other antibody-based detection platforms. Its defined sequence allows for the selective capture or detection of hTERT-specific antibodies, thereby enhancing assay specificity and sensitivity. These applications are particularly relevant in studies investigating telomerase expression levels in various cellular models and experimental conditions.

Peptide-based inhibitor screening: The 865-873 region has been implicated in protein-protein interactions critical for telomerase function. As such, the peptide can be utilized in in vitro binding assays to screen for small molecules or other peptides that disrupt these interactions. This approach supports the identification of novel modulators of telomerase activity, aiding drug discovery initiatives focused on telomere biology and cellular immortalization mechanisms.

Phosphorylation and post-translational modification studies: The sequence encompassing residues 865 to 873 includes sites that may undergo phosphorylation or other post-translational modifications in vivo. Synthetic access to this peptide enables researchers to investigate the impact of specific modifications on telomerase structure and function, either through direct biochemical assays or by serving as a substrate in kinase or phosphatase studies. Such investigations provide valuable insights into the regulatory mechanisms governing telomerase activity.

Structural and functional analysis: Incorporating the 865-873 peptide into structural biology workflows allows for targeted studies of the C-terminal domain's role in telomerase assembly, stability, and substrate recognition. By examining the peptide's interactions with other telomerase components or with nucleic acids, scientists can elucidate critical aspects of telomerase architecture and mechanism. These studies contribute to a deeper understanding of how specific sequence motifs within hTERT influence the enzyme's biological function and regulation.

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