JoVE - Journal of Visualized Experiments
JoVE Visualize
Contact Us

SETD6 mediates selective interaction and genomic occupancy of BRD4 and MITF in melanoma cells

  • 0The Shraga Segal Department of Microbiology, Immunology and Genetics, Ben-Gurion University of the Negev, P.O.B. 653, Be'er-Sheva 84105, Israel.
Nar Cancer +

|

August 14, 2025

|

August 14, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

SETD6 regulates melanoma by modifying BRD4, a key protein. This SETD6-BRD4 interaction, along with MITF, controls gene transcription in melanoma cells.

Area Of Science

  • Molecular Biology
  • Cancer Research
  • Epigenetics

Background

  • Aberrant transcription drives melanoma, the deadliest skin cancer.
  • The lysine methyltransferase SETD6's role in melanoma is unknown.
  • SETD6 regulates transcription by methylating BRD4 at K99, affecting mRNA translation genes.

Purpose Of The Study

  • Investigate SETD6's function in melanoma.
  • Elucidate the mechanism of SETD6-mediated regulation in melanoma cells.
  • Identify novel interactions and pathways involved in melanoma pathogenesis.

Main Methods

  • Studied SETD6 and BRD4 interactions in melanoma cells.
  • Utilized knockout and point mutation models for SETD6 and BRD4.
  • Analyzed genomic occupancy and protein interactions using ChIP and co-immunoprecipitation.

Main Results

  • SETD6-mediated BRD4 methylation at K99 occurs in melanoma cells.
  • SETD6 knockout or BRD4-K99 mutation disrupts BRD4 genomic binding.
  • SETD6 interacts with MITF, influencing its genomic distribution and forming a novel chromatin complex with BRD4.

Conclusions

  • SETD6 plays a critical role in melanoma transcriptional regulation.
  • A novel chromatin complex involving SETD6, methylated BRD4, and MITF is crucial for melanoma.
  • This complex mediates the selective recruitment of BRD4 and MITF to specific genomic sites in melanoma.

Related Concept Videos

Master Transcription Regulators 02:23

7.0K

Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...

Mitogens and the Cell Cycle 02:38

6.7K

Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...

TGF - β Signaling Pathway 01:16

7.6K

The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...

MAPK Signaling Cascades 01:07

6.0K

Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...