Microsomal glutathione S-transferase 1 isoform a (121-132)

Microsomal glutathione S-transferase 1 isoform a (121-132) is a synthetic peptide corresponding to amino acids 121 through 132 of the human microsomal glutathione S-transferase 1 (MGST1) protein. As a segment of a crucial membrane-associated enzyme involved in cellular detoxification, this peptide plays a significant role in studies focused on redox biology, enzymatic function, and protein-protein interactions. Its defined sequence enables researchers to probe specific structural and functional regions of MGST1, facilitating the investigation of mechanisms underlying glutathione conjugation and oxidative stress response in various biological systems.

Peptide mapping: Researchers employ this peptide as a reference standard in peptide mapping and mass spectrometry-based proteomics. By providing a well-characterized fragment of MGST1, it aids in the identification and quantification of the parent protein in complex biological samples. This application is particularly valuable for validating protein expression, post-translational modifications, and isoform-specific localization in cellular or tissue extracts.

Antibody production and validation: The synthetic peptide serves as an immunogen or epitope for the generation of polyclonal or monoclonal antibodies specific to the MGST1 protein. Its unique sequence allows for the production of antibodies that recognize distinct regions of the enzyme, supporting the development of highly selective immunoassays, Western blotting reagents, and immunoprecipitation tools. Additionally, it is used as a positive control in antibody specificity testing and epitope mapping experiments.

Enzyme mechanism studies: As a defined segment of the MGST1 protein, the peptide is instrumental in dissecting the structure-function relationships within the enzyme. Researchers utilize it in binding assays, site-directed mutagenesis studies, and functional reconstitution experiments to elucidate the roles of specific amino acid residues in substrate recognition, glutathione binding, and catalytic activity. Such investigations advance the understanding of how MGST1 mediates detoxification processes at the molecular level.

Protein-protein interaction analysis: The peptide is employed in assays designed to characterize interactions between MGST1 and its binding partners. By serving as a bait or probe in pull-down assays, surface plasmon resonance, or fluorescence-based techniques, it helps identify and validate molecular interactions that regulate enzyme localization, activity, or stability. This application supports the discovery of novel regulatory mechanisms and potential modulators of glutathione S-transferase function.

Epitope mapping and structural studies: Structural biologists and immunologists use this peptide to define antibody-binding sites and to analyze conformational epitopes on the MGST1 protein. Its application extends to crystallography, NMR, and computational modeling, where it assists in elucidating the three-dimensional arrangement of functional domains. Insights gained from these studies contribute to a deeper understanding of enzyme architecture and the development of targeted biochemical probes.

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