DNA mismatch repair protein Mlh3
MLH3 protein, partial (135-151) is a synthetic peptide fragment corresponding to amino acids 135 through 151 of the human MutL homolog 3 (MLH3) protein. As part of the DNA mismatch repair (MMR) pathway, MLH3 plays a critical role in maintaining genomic stability by recognizing and repairing erroneous insertions, deletions, and misincorporations that occur during DNA replication. The 135-151 region lies within a functionally significant domain, making this peptide fragment valuable for probing protein-protein interactions, post-translational modifications, and structural features relevant to MMR processes. Researchers utilize such defined peptide segments to dissect the molecular mechanisms of DNA repair, investigate protein binding motifs, and develop tools for the study of genome maintenance across eukaryotes.
Protein Interaction Studies: The MLH3 (135-151) peptide is widely used as a probe in protein-protein interaction assays, such as pull-downs or surface plasmon resonance, to map binding interfaces within the MMR complex. By isolating this specific segment, investigators can identify interaction partners of the MLH3 protein, elucidate the role of the 135-151 region in heterodimerization with other MutL homologs, and characterize sequence-specific affinities. Such studies are essential for understanding the assembly and regulation of the MMR machinery at a molecular level.
Antibody Production: The defined amino acid sequence of the MLH3 (135-151) fragment makes it a suitable immunogen for generating polyclonal or monoclonal antibodies targeting this region of the full-length protein. These antibodies can be employed in a range of immunodetection techniques, including Western blotting, immunoprecipitation, and immunofluorescence, enabling precise localization and quantification of MLH3 expression in various biological samples. The specificity conferred by this peptide fragment supports the development of reliable reagents for basic and applied research in DNA repair biology.
Phosphorylation and Post-Translational Modification Analysis: Researchers frequently use the MLH3 (135-151) peptide as a substrate in kinase assays or mass spectrometry-based studies to investigate potential phosphorylation sites and other post-translational modifications within the MLH3 protein. By analyzing the modification patterns of this peptide, scientists can gain insight into the regulatory mechanisms that modulate MLH3 activity and stability, as well as their impact on the efficiency and fidelity of the mismatch repair pathway.
Epitope Mapping: The well-defined sequence of this peptide fragment enables its use in epitope mapping experiments, where it serves to identify regions of MLH3 recognized by antibodies or interacting proteins. Such mapping is crucial for dissecting the functional domains of MLH3, understanding immune recognition patterns, and refining the design of diagnostic or research-grade antibodies. These insights contribute to a more detailed understanding of MLH3's structure-function relationships.
Structural and Functional Assays: The MLH3 (135-151) segment is often incorporated into structural biology studies, such as NMR spectroscopy or crystallography, to elucidate conformational features and secondary structure elements within this region. Functional assays employing this peptide can reveal how sequence-specific motifs contribute to DNA binding, protein stability, or complex formation within the MMR network. These approaches help clarify the contribution of individual domains to overall protein function and DNA repair fidelity.
Collectively, the MLH3 protein, partial (135-151) peptide provides a versatile and scientifically robust tool for researchers investigating the molecular underpinnings of DNA mismatch repair, protein interactions, antibody development, and the structural biology of genome maintenance pathways. Its applications span fundamental research, reagent development, and advanced biochemical analysis, supporting a wide array of experimental strategies in the study of genome integrity.
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