PRMT6 activates cyclin D1 expression in conjunction with the transcription factor LEF1

Area of Science:

• Epigenetics
• Molecular Biology
• Cell Biology

Background:

• Cell fate decisions rely on transcription factors and epigenetic regulators like Protein arginine methyltransferase 6 (PRMT6).
• PRMT6 influences cell differentiation and proliferation by methylating histone H3, but requires transcription factors for recruitment to target genes.
• Limited transcription factors are known to recruit PRMT6 to cell cycle genes.

Purpose of the Study:

• To investigate the role of LEF1 in recruiting PRMT6 to target genes.
• To elucidate the mechanism by which PRMT6 regulates cell cycle progression.
• To explore the therapeutic potential of PRMT6 inhibition in cancer.

Main Methods:

• Protein-protein interaction studies to identify LEF1 as a PRMT6 partner.
• Gene expression analysis (e.g., CCND1) following knockdown of LEF1 or PRMT6.
• Cell cycle analysis to assess proliferation changes.

Main Results:

• LEF1 was identified as an interaction partner of PRMT6.
• LEF1 facilitates the recruitment of PRMT6 to the CCND1 gene promoter.
• Knockdown of either LEF1 or PRMT6 led to reduced CCND1 expression.
• PRMT6 knockdown resulted in increased G1 phase cell population and decreased proliferation.

Conclusions:

• LEF1 plays a role in recruiting PRMT6 to CCND1, a key cell cycle regulator.
• PRMT6 activity, mediated by LEF1, is crucial for cell cycle progression and proliferation.
• These findings support the development of PRMT6 inhibitors for cancer treatment.