Understanding YTHDF2-mediated mRNA Degradation By m⁶A-BERT-Deg

Area of Science:

• Molecular Biology
• Computational Biology
• Epigenetics

Background:

• N6-methyladenosine (m⁶A) is a crucial mRNA modification regulating gene expression.
• YTHDF2 protein mediates m⁶A-dependent mRNA decay, but its precise regulatory mechanisms remain unclear.

Approach:

• Developed m⁶A-BERT-Deg, a BERT model for predicting YTHDF2-mediated mRNA degradation.
• Utilized a pre-training-fine-tuning strategy on extensive unlabeled m⁶A site sequences to enhance model performance.
• Integrated multiple data sources for high-quality training datasets in HeLa and HEK293 cell lines.

Key Points:

• The pre-training strategy significantly improved m⁶A-BERT-Deg's predictive accuracy compared to benchmark models.
• Model interpretation revealed that co-factors near m⁶A sites can impede YTHDF2 binding, thereby stabilizing mRNA.
• Context-dependent regulation of YTHDF2-mediated mRNA degradation was observed across different cell lines.

Conclusions:

• m⁶A-BERT-Deg provides a powerful tool for understanding mRNA decay pathways.
• Co-factor interactions represent a novel regulatory layer in m⁶A-mediated gene silencing.
• Findings highlight the cell-type-specific nature of RNA modification regulation.