Component of the dammarane-type triterpene saponins (e.g. PPD-type ginsenosides or panaxosides) biosynthetic pathway (PubMed:25320211, PubMed:27746309, PubMed:29378087). Glycosyltransferase that catalyzes the biosynthesis of ginsenoside Rh2 from protopanaxadiol (PPD) and the conversion of compound K to ginsenoside F2 (PubMed:25320211, PubMed:27746309). (20S)-ginsenoside C-K + UDP-alpha-D-glucose = (20S)-ginsenoside F2 + H(+) + UDP (20S)-protopanaxadiol + UDP-alpha-D-glucose = (20S)-ginsenoside Rh2 + H(+) + UDP kcat is 55.6 usec(-1) with protopanaxadiol as substrate (at pH 7 and 35 degrees Celsius). kcat is 134.7 usec(-1) with compound K as substrate (at pH 7 and 35 degrees Celsius). Secondary metabolite biosynthesis; terpenoid biosynthesis. Expressed at higher levels in roots than in leaves. Induced by methyl jasmonate (MeJA) in roots and leaves (PubMed:25320211). Induced by A.niger mycelium-derived elicitor, thus improving ginsenosides production in adventitious roots culture (PubMed:27746309). Belongs to the UDP-glycosyltransferase family.