Cbga Synthase

CBGA synthase is the enzyme responsible for catalyzing the first committed step in cannabinoid biosynthesis—the condensation of geranyl pyrophosphate (GPP) and olivetolic acid to form cannabigerolic acid (CBGA). CBGA serves as the precursor to all major cannabinoids including THCA, CBDA, and CBCA through subsequent enzymatic modifications. The expression and activity of CBGA synthase directly influences the cannabinoid profile and total cannabinoid yield in cannabis plants. Genetic variation in the genes encoding this enzyme contributes to the biochemical diversity observed across different cultivars and breeding lines. Understanding CBGA synthase function is essential for breeders seeking to develop plants with specific cannabinoid ratios.

Breeders working in cannabinoid-focused programs monitor CBGA synthase expression as a foundational trait affecting downstream cannabinoid accumulation. Cultivars with higher CBGA synthase activity typically produce greater total cannabinoid content, making enzyme expression a useful marker in selective breeding for potency and cannabinoid ratio stability.