Programmable methylation engineering: Design principles from alkaloid biosynthesis.

Programmable methylation engineering enables scalable biosynthesis of complex alkaloids by optimizing methyltransferase function and cofactor cycling.

• Why it matters: Understanding and improving methyltransferase activity is crucial because their limited plasticity and stability hinder the efficient production of methylated compounds with desirable bioactivities and pharmacokinetics.
• What they did: The study synthesizes recent advances in enzyme engineering, cofactor optimization, and metabolic control, focusing on expanding catalytic plasticity, enhancing enzyme robustness, and balancing methylation flux through 4 key design principles.
• The result: These principles facilitate the rational design of methylation pathways, enabling robust, scalable production of methylated alkaloids and other high-value chemicals, advancing biotechnological applications.