olyprenyl transferase; part of the gene cluster that mediates the biosynthesis of the meroterpenoids nectripenoids A and B, as well as cochliquninone D and isocochliquninone E (PubMed:29797385). The pathway probably begins with the HR-PKS ntnH that catalyzes two chain-extension steps to form a reduced triketide, which then primes the SAT domain in the NR-PKS ntnG to initiate three more cycles of extension to give a linear hexaketide corresponding to the polyketide part of nectripenoids (Probable). The FAD-dependent monooxygenase ntnJ then performs an oxidative decarboxylation at C11 of the ntnH/ntnG product, via an electrophilic aromatic hydroxylation with concomitant ipso-decarboxylation (Probable). The membrane-bound polyprenyl transferase ntnF then introduces a farnesyl group before the FAD-dependent monooxygenase ntnK functions as the first epoxidase on terminal C12'-C13' olefin, followed by a second epoxidation on C7'-C8' catalyzed by ntnA (Probable). The terpene cyclase/mutase ntnI then initiates the sequential tricyclic ring formation through protonation of the terminal epoxide and catalyzes the regioselective and stereoselective 6/6/6-tricyclic ring formation (Probable). The cytochrome P450 monooxygenase ntnM may then hydroxylate C1' (Probable). Secondary metabolite biosynthesis; terpenoid biosynthesis. Belongs to the UbiA prenyltransferase family.