Figure 1.
The monolignol biosynthetic pathway with associated glycosylated products and uridine diphosphate glucosyltransferases (UGT) catalyzing in vitro this glycosylation in Arabidopsis (indicated in blue), in presence of uridine diphosphate (UDP)-glucose (references within the text). UGT72E1 has been localized in the nucleus [32]. PAL-dependent salicylic acid biosynthetic pathway is also represented [33]. Glycosylated molecules are represented in bold. 4CL, 4-coumarate ligase; AIM1, abnormal inflorescence meristem 1; BA2H, benzoic acid 2-hydroxylase; C3H, 4-coumarate 3-hydroxylase; C3′H, 4-coumaroyl shikimate/quinate 3′-hydroxylase; C4H, cinnamate-4-hydroxylase; CAD, cinnamyl alcohol dehydrogenase; CCoAOMT, caffeoyl-CoA 3-O-methyltransferase; CCR, cinnamoyl CoA reductase; COMT, caffeate O-methyltransferase; CSE, caffeoyl shikimate esterase; F5H, ferulate 5-hydroxylase; HCT, hydroxycinnamoyl-CoA:shikimate/quinate hydroxycinnamoyltransferase; PAL, phenylalanine ammonia-lyase.
