MybMim is a peptide mimetic of the transcription factor Myb transactivation domain, designed to engage CBP/p300-like coactivator surfaces. Hydrophobic and acidic residues recreate key hot spots for protein-protein recognition. Researchers employ it to dissect transcriptional complex assembly and competition. Applications include PPI-inhibitor modeling, transcription-factor biology, and structural-epitope mapping.
CAT No: R2758
Mybmim is a synthetic peptide compound designed to function as a cell-permeable inhibitor of the Myb-CBP/p300 interaction, a critical protein-protein interface involved in gene transcription regulation. Structurally engineered to mimic the transactivation domain of the c-Myb transcription factor, Mybmim competitively disrupts the recruitment of CREB-binding protein (CBP) and p300 coactivators, thereby modulating downstream gene expression pathways. This peptide has become a valuable molecular tool in the exploration of transcriptional regulation, oncogenic signaling, and epigenetic control mechanisms, providing researchers with a targeted approach to dissecting the functional consequences of Myb-driven transcriptional programs in various biological systems.
Transcriptional regulation studies: Mybmim is extensively utilized in fundamental research focused on elucidating the molecular mechanisms governing gene expression. By selectively interfering with the Myb-CBP/p300 interaction, it enables precise interrogation of Myb-dependent transcriptional networks in both normal and transformed cells. Researchers employ this peptide to map the gene sets regulated by Myb, assess the impact of transcriptional perturbation on cellular phenotypes, and analyze the broader consequences of transcription factor-coactivator disruption in developmental biology and disease models.
Epigenetic modulation research: The ability of Mybmim to disrupt the association between Myb and chromatin-modifying coactivators renders it a powerful reagent for epigenetics studies. Its application allows scientists to investigate how transcription factor-mediated recruitment of histone acetyltransferases such as CBP and p300 influences chromatin structure, histone modification patterns, and subsequent gene activation or repression. Through these studies, the peptide facilitates deeper understanding of the interplay between transcription factors and epigenetic regulators in controlling cell fate decisions and lineage specification.
Cancer biology investigations: Given the central role of c-Myb in hematopoietic malignancies and certain solid tumors, Mybmim serves as an indispensable probe for dissecting oncogenic signaling pathways. By blocking the interaction between Myb and its coactivators, the peptide enables researchers to model the effects of transcriptional inhibition on tumor cell proliferation, survival, and differentiation. Such studies provide crucial insights into the molecular dependencies of cancer cells and help identify vulnerabilities that could inform future drug discovery efforts.
Peptide-protein interaction mapping: Mybmim is also employed as a reference tool in studies aimed at characterizing the structural and functional features of protein-protein interactions involving transcription factors. It serves as a benchmark for validating novel inhibitors of the Myb-CBP/p300 interface, optimizing peptide design strategies, and developing high-throughput screening assays. The use of this peptide in binding affinity measurements and structure-activity relationship analyses enhances the precision and reliability of protein interaction studies across a range of experimental platforms.
Peptide synthesis and assay development: The unique design and well-characterized activity of Mybmim make it valuable for optimizing peptide synthesis protocols and assay formats. Researchers utilize the peptide as a positive control or standard in biochemical assays assessing the inhibition of transcription factor-coactivator interactions. Its defined sequence and mechanism of action support the calibration of detection systems, validation of experimental workflows, and benchmarking of novel peptide-based inhibitors, thereby contributing to the advancement of peptide chemistry and functional screening methodologies.
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