Geranylpyrophosphate Pathway

Geranylpyrophosphate (GPP) is a foundational precursor molecule in cannabis biochemistry that sits at a critical metabolic junction. This C10 isoprenoid unit forms the backbone from which monoterpenes (10-carbon compounds like limonene, myrcene, and pinene) are synthesized through further enzymatic modification. GPP itself does not accumulate as a volatile terpene in cannabis flowers, but rather serves as the essential building block that terpene synthase enzymes convert into aromatic compounds. Understanding GPP's role is fundamental to grasping how cannabis produces its characteristic volatile terpene profiles, as disruptions or variations in GPP availability directly influence which monoterpenes accumulate and in what ratios.

Breeders working with terpene enhancement often focus on upstream metabolic efficiency rather than individual terpene targets. Selecting for robust GPP production and efficient terpene synthase expression can yield plants with higher overall terpene density and more stable volatile profiles across growing conditions.