Programmable methylation engineering: Design principles from alkaloid biosynthesis.

Programmable methylation engineering enables robust alkaloid biosynthesis through four key design principles across enzyme, cofactor, and system levels.

• Why it matters: Understanding and overcoming limitations in methyltransferase application is crucial for expanding the biosynthesis of methylated compounds with desired properties.
• What they did: The review synthesizes recent advances in methyltransferase-based alkaloid biosynthesis, focusing on enzyme engineering, cofactor optimization, and metabolic control, highlighting four core design principles.
• The result: Implementing these principles can establish programmable methylation as a framework for scalable, efficient production of complex alkaloids and methylated chemicals.