Golgin subfamily A member 3 (875-883)

Golgin subfamily A member 3 (875-883) is a synthetic peptide fragment derived from the C-terminal region of the Golgin A3 protein, a member of the golgin family involved in Golgi apparatus structure and vesicular trafficking. As a short peptide sequence corresponding to amino acids 875 through 883, it serves as a valuable tool for dissecting protein-protein interactions, post-translational modification patterns, and subcellular localization mechanisms related to Golgi function. Due to the role of Golgin A3 in maintaining Golgi integrity and mediating vesicle tethering, this peptide fragment is particularly relevant for studies aimed at elucidating the molecular details of intracellular transport and organelle dynamics.

Protein interaction mapping: Researchers utilize the Golgin A3 (875-883) peptide in in vitro binding assays to investigate specific interaction motifs within the larger Golgin A3 protein. By providing a defined and accessible segment, the peptide enables precise identification of binding partners, including small GTPases, vesicle coat proteins, and other golgin family members. Such studies are instrumental in clarifying the role of this region in the recruitment of tethering factors and the assembly of multi-protein complexes at the Golgi membrane.

Antibody epitope characterization: The defined sequence of the Golgin A3 (875-883) peptide makes it an excellent antigen for generating and validating antibodies that recognize specific epitopes within the parent protein. Custom antibodies raised against this peptide can be used in immunoblotting, immunoprecipitation, or immunofluorescence assays to selectively detect endogenous or overexpressed Golgin A3. This approach enhances the specificity of immunological tools and supports high-fidelity localization and quantification studies.

Post-translational modification analysis: Synthetic peptides corresponding to functional domains of Golgi-associated proteins are frequently employed in mass spectrometry-based workflows to investigate site-specific modifications such as phosphorylation or acetylation. The Golgin A3 (875-883) fragment can serve as a substrate or reference standard for identifying modification patterns, enabling researchers to map regulatory events that influence Golgi dynamics, vesicle trafficking, or protein sorting.

Peptide-based structural studies: The short, well-defined nature of the Golgin A3 (875-883) peptide allows for its application in biophysical analyses such as circular dichroism spectroscopy, NMR, or crystallography. These approaches help elucidate secondary structure propensities, conformational flexibility, or interaction-induced folding within the C-terminal region of Golgin A3. Insights gained from such studies contribute to a deeper understanding of the molecular architecture that underpins Golgi apparatus organization.

Functional disruption assays: By introducing the synthetic peptide into cell extracts or in vitro reconstitution systems, researchers can competitively inhibit or modulate interactions mediated by the native Golgin A3 C-terminus. This strategy is valuable for dissecting the functional consequences of disrupting specific protein-protein contacts, thereby revealing the mechanistic underpinnings of Golgi maintenance and vesicle tethering. Such applications support the broader goal of mapping the dynamic interplay between structural proteins and trafficking machinery in eukaryotic cells.

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