FEATURES

FAMILY

DESCRIPTION

Also known as U89C1_ARATH, UGT89C1. Flavonol 7-O-rhamnosyltransferase that catalyzes the transfer of rhamnose from UDP-rhamnose to the 7-OH position of 3-O-glycosylated flavonols, such as kaempferol 3-O-rhamnoside, kaempferol 3-O-glucoside, quercetin 3-O-glucoside, quercetin 3-O-galactoside, quercetin 3-O-rhamnoside and isorhamnetin 3-O-glucoside (PubMed:17314094, PubMed:23549747, PubMed:24251900, PubMed:30893500). Is able to glycosylate the flavonols quercetin and kaempferol to yield quercetin 7-O-rhamnoside and kaempferol 7-O-rhamnoside (PubMed:17314094, PubMed:26513760, PubMed:30893500). Shows a strict specificity for UDP-rhamnose as sugar donor (PubMed:17314094, PubMed:30893500). Does not act on 3-O-glycosylated anthocyanins (PubMed:17314094). The accumulation of kaempferol 3-O-rhamnoside-7-O-rhamnoside inhibits basipetal auxin transport, which influences auxin distribution and plant organ development (PubMed:24251900, PubMed:26742840).

EXTERNAL LINKS

UGT89C1

Flavonol 7-O-rhamnosyltransferase

UGT89C1

Molecular Synopsis