MYC Protein: Target Overview, Research Applications, and Selection Guide
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MYC is a multifunctional transcription factor that regulates a broad network of genes involved in cell cycle progression, proliferation, metabolism, apoptosis, and ribosome biogenesis. As a member of the basic helix-loop-helix leucine zipper (bHLHZ) family, MYC forms heterodimers with its partner MAX to bind E-box DNA elements (CACGTG) and activate or repress transcription. MYC is frequently dysregulated in human cancers, making it a high-priority but challenging therapeutic target. Recombinant MYC proteins are essential tools for studying protein-protein interactions, DNA binding, transcriptional regulation, and small-molecule inhibitor discovery.
MYC Target Overview
MYC (c-MYC) is a nuclear phosphoprotein with a short half-life and tightly controlled expression. It functions as a master regulator of growth-related genes. Key aspects of MYC biology include:
- Heterodimerization with MAX, which is required for high-affinity DNA binding
- Regulation of thousands of target genes (e.g., cyclins, CDKs, ribosome components, metabolic enzymes)
- Involvement in oncogenesis through amplification, translocation, or overexpression in >50% of human cancers
- Context-dependent apoptosis induction (e.g., when MYC is overexpressed without sufficient survival signals)
- Regulation by multiple signaling pathways (MAPK, PI3K/AKT, WNT, MYC stability controlled by ubiquitination/proteasome)
Besides c-MYC, the family includes N-MYC and L-MYC, each with distinct expression patterns and oncogenic roles. Isoform and mutation status (e.g., T58A, P57S affecting protein stability) are important experimental considerations.
MYC Target Information
Target Name: MYC proto-oncogene protein, c-MYC
Synonyms: Myc; c-Myc; transcription factor p64; bHLHe39
UniProt ID: P01106
Target Class: Transcription factor; bHLHZ protein; oncoprotein
Key Research Applications of MYC Protein
Recombinant MYC is used in biochemical, biophysical, and cell-based studies rather than enzymatic activity assays (MYC lacks catalytic activity).
Protein-Protein Interaction Studies
- Study MYC-MAX heterodimer formation.
- Analyze interactions with MYC-associated cofactors such as TRRAP, GCN5, and WDR5.
- Support pull-down, binding, and complex formation studies.
DNA Binding Assays
- Evaluate MYC-MAX binding to E-box DNA sequences.
- Support EMSA, fluorescence polarization, SPR, BLI, and DNA binding ELISA workflows.
- Compare wild-type, mutant, and domain-specific MYC constructs.
Inhibitor Screening
- Screen small molecules or peptides that disrupt MYC-MAX dimerization.
- Evaluate inhibitors targeting MYC-DNA binding.
- Support AlphaScreen, TR-FRET, SPR, and other screening platforms.
Transcriptional Activity Assays
- Support E-box-driven reporter assay design.
- Study MYC-dependent transcriptional regulation.
- Evaluate MYC activity in cell-based systems using MYC expression constructs or ORF clones.
Ubiquitination and Degradation Studies
- Study MYC protein stability and degradation.
- Evaluate phosphorylation-dependent degradation mechanisms.
- Use full-length MYC as a substrate in ubiquitination or proteasome-related assays.
Antibody Development and Validation
- Support MYC antibody validation for Western blot, IHC, ChIP, or related applications.
- Provide positive controls for MYC expression detection.
- Enable validation of MYC phosphorylation, degradation, or family-member specificity.
MYC Experimental Workflows and Use Cases
Recombinant MYC proteins are most effective in biochemical and biophysical workflows:
- EMSA – Validation of MYC-MAX complex binding to consensus E-box DNA
- SPR / BLI – Kinetic analysis of MYC-MAX dimerization or DNA interaction
- AlphaScreen / TR-FRET – High-throughput screening for dimerization disruptors
- Pull-down assays – Mapping interaction domains with co-activators
- In vitro translation / degradation – Used as substrate for ubiquitin ligase or proteasome assays
Because MYC is a nuclear transcription factor, it is not suitable for receptor-ligand binding or membrane protein workflows. For co-factor binding studies, consider adding MAX or other partners.
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