Component of the dammarane-type triterpene saponins (e.g. PPT-type ginsenosides or panaxosides) biosynthetic pathway (PubMed:26032089, PubMed:27746309, PubMed:29378087). Glycosyltransferase that catalyzes the biosynthesis of ginsenoside Rh1 from protopanaxatriol (PPT) and the conversion of ginsenoside F1 to ginsenoside Rg1 (PubMed:26032089, PubMed:27746309). (20S)-protopanaxadiol + UDP-alpha-D-glucose = (20S)-ginsenoside C-K + H(+) + UDP (20S)-protopanaxatriol + UDP-alpha-D-glucose = (20S)-ginsenoside Rh1 + H(+) + UDP (20S)-ginsenoside F1 + UDP-alpha-D-glucose = (20S)-ginsenoside Rg1 + H(+) + UDP Secondary metabolite biosynthesis; terpenoid biosynthesis. Induced by A.niger mycelium-derived elicitor, thus improving ginsenosides production in adventitious roots culture. Belongs to the UDP-glycosyltransferase family.