MoCul4 assists MoKmt1 to catalyze H3K9 methylation and regulates the growth, development, and pathogenicity in Magnaporthe oryzae.

MoCul4 enhances MoKmt1 activity to regulate H3K9 methylation, crucial for growth, development, and pathogenicity in Magnaporthe oryzae, with 90.4% conidiation reduction observed.

• Why it matters: Understanding epigenetic regulation in M. oryzae is vital for developing new strategies against rice blast disease, a major threat to global rice production.
• What they did: Researchers generated knockout mutants of MoKmt1 and MoCul4, analyzed their phenotypes, and performed Western blot and RNA-seq to explore their roles in H3K9me3 methylation and gene regulation.
• The result: Findings show MoCul4 modulates MoKmt1 activity, affecting heterochromatin integrity and gene expression, which opens avenues for targeted fungicide development based on epigenetic mechanisms.