Accepted name: tartronate O-hydroxycinnamoyltransferase
Reaction: sinapoyl-CoA + 2-hydroxymalonate = CoA + sinapoyltartronate
Glossary: sinapate = 4-hydroxy-3,5-dimethoxycinnamate
tartronate = 2-hydroxymalonate
Other name(s): tartronate sinapoyltransferase; hydroxycinnamoyl-coenzyme-A:tartronate hydroxycinnamoyltransferase
Systematic name: sinapoyl-CoA:2-hydroxymalonate O-(hydroxycinnamoyl)transferase
Comments: 4-Coumaroyl-CoA (4-hydroxycinnamoyl-CoA), caffeoyl-CoA (3,4-dihydroxycinnamoyl-CoA) and feruloyl-CoA (4-hydroxy-3-methoxycinnamoyl-CoA) can also act as donors for the enzyme from the mung bean (Vigna radiata).
1.  Strack, D., Ruhoff, R. and Gräwe, W. Hydroxycinnamoyl-Coenzyme-A-tartronate hydroxycinnamoyltransferase in protein preparations from mung bean. Phytochemistry 25 (1986) 833–837.
[EC created 1989, modified 1990, modified 2002]
Accepted name: sinapate 1-glucosyltransferase
Reaction: UDP-α-D-glucose + sinapate = UDP + 1-O-sinapoyl-β-D-glucose
Glossary: sinapate = (2E)-3-(4-hydroxy-3,5-dimethoxyphenyl)prop-2-enoate
Other name(s): uridine diphosphoglucose-sinapate glucosyltransferase; UDP-glucose:sinapic acid glucosyltransferase; uridine 5′-diphosphoglucose-hydroxycinnamic acid acylglucosyltransferase; UDP-glucose:sinapate D-glucosyltransferase
Systematic name: UDP-α-D-glucose:sinapate D-glucosyltransferase
Comments: Some other hydroxycinnamates, including 4-coumarate, ferulate and caffeate, can act as acceptors, but more slowly. Only glucose esters, not glucosides, are formed (cf. EC hydroxycinnamate 4-β-glucosyltransferase).
1.  Strack, D. Enzymatic synthesis of 1-sinapoylglucose from free sinapic acid and UDP-glucose by a cell free system from Raphanus sativus seedlings. Z. Naturforsch. C: Biosci. 35 (1980) 204–208.
[EC created 1984]
Accepted name: hydroxycinnamate 4-β-glucosyltransferase
Reaction: UDP-glucose + trans-4-hydroxycinnamate = UDP + 4-O-β-D-glucosyl-4-hydroxycinnamate
Other name(s): uridine diphosphoglucose-hydroxycinnamate glucosyltransferase; UDP-glucose-hydroxycinnamate glucosyltransferase; hydroxycinnamoyl glucosyltransferase
Systematic name: UDP-glucose:trans-4-hydroxycinnamate 4-O-β-D-glucosyltransferase
Comments: Acts on 4-coumarate, ferulate, caffeate and sinapate, forming a mixture of 4-glucosides and glucose esters (cf. EC sinapate 1-glucosyltransferase).
1.  Fleuriet, A., Macheix, J.J., Suen, R. and Ibrahim, R.K. Partial purifiction and some properties of a hydroxycinnamoyl glucosyltransferase from tomato fruits. Z. Naturforsch. C: Biosci. 35 (1980) 967–972.
[EC created 1984]
Accepted name: cyanidin 3-O-glucoside 5-O-glucosyltransferase (acyl-glucose)
Reaction: 1-O-sinapoyl-β-D-glucose + cyanidin 3-O-β-D-glucoside = sinapate + cyanidin 3,5-di-O-β-D-glucoside
Glossary: sinapate = 4-hydroxy-3,5-dimethoxycinnamate
cyanidin = 3,3′,4′,5,7-pentahydroxyflavylium
Other name(s): AA5GT
Systematic name: 1-O-sinapoyl-β-D-glucose:cyanidin-3-O-β-D-glucoside 5-O-β-D-glucosyltransferase
Comments: Isolated from the plant Dianthus caryophyllus (carnation). Also acts on other anthocyanidins and with other acyl-glucose donors. cf. EC, anthocyanidin 3-O-glucoside 5-O-glucosyltransferase.
1.  Matsuba, Y., Sasaki, N., Tera, M., Okamura, M., Abe, Y., Okamoto, E., Nakamura, H., Funabashi, H., Takatsu, M., Saito, M., Matsuoka, H., Nagasawa, K. and Ozeki, Y. A novel glucosylation reaction on anthocyanins catalyzed by acyl-glucose-dependent glucosyltransferase in the petals of carnation and delphinium. Plant Cell 22 (2010) 3374–3389. [PMID: 20971893]
2.  Nishizaki, Y., Matsuba, Y., Okamoto, E., Okamura, M., Ozeki, Y. and Sasaki, N. Structure of the acyl-glucose-dependent anthocyanin 5-O-glucosyltransferase gene in carnations and its disruption by transposable elements in some varieties. Mol. Genet. Genomics 286 (2011) 383–394. [PMID: 22048706]
[EC created 2013]
Accepted name: sinapine esterase
Reaction: sinapoylcholine + H2O = sinapate + choline
Other name(s): aromatic choline esterase
Systematic name: sinapoylcholine sinapohydrolase
1.  Nurmann, G. and Strack, D. Sinapine esterase. 1. Characterization of sinapine esterase from cotyledons of Raphanus sativus. Z. Naturforsch. C: Biosci. 34 (1979) 715–720.
[EC created 1984]