Polyketide Synthase

Polyketide synthase (PKS) enzymes are a family of proteins that catalyze the assembly of polyketide compounds in cannabis, contributing to the plant's secondary metabolite diversity. These enzymes work through iterative condensation and reduction cycles, building complex carbon chains that serve as precursors to various flavonoids, stilbenes, and other aromatic compounds. PKS activity is particularly relevant in cannabinoid and terpene biosynthesis pathways, though the enzyme family's full role in cannabis chemotype expression remains an active area of research. Breeders and geneticists studying cannabinoid ratios and aromatic profiles increasingly focus on PKS gene expression as a potential marker for chemical diversity. Understanding PKS function helps contextualize how different cultivars develop distinct flavor and aroma signatures across generations.

Breeders working toward specific chemotype ratios or enhanced aromatic complexity sometimes select for lines with elevated PKS expression, as these enzymes influence the production of precursor compounds that differentiate cultivars. PKS gene variants may correlate with terpene and flavonoid diversity, making them targets for molecular-assisted breeding programs.