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Your query returned 4 entries. Printable version
EC | 1.13.11.84 | ||||||
Accepted name: | crocetin dialdehyde synthase | ||||||
Reaction: | zeaxanthin + 2 O2 = crocetin dialdehyde + 2 3β-hydroxy-β-cyclocitral (overall reaction) (1a) zeaxanthin + O2 = 3β-hydroxy-8′-apo-β-carotenal + 3β-hydroxy-β-cyclocitral (1b) 3β-hydroxy-8′-apo-β-carotenal + O2 = crocetin dialdehyde + 3β-hydroxy-β-cyclocitral |
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Glossary: | crocetin dialdehyde = 8,8′-diapocarotene-8,8′-dial zeaxanthin = (3R,3′R)-β,β-carotene-3,3′-diol 3β-hydroxy-β-cyclocitral = (4R)-4-hydroxy-2,6,6-trimethylcyclohex-1-en-1-carboxaldehyde |
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Other name(s): | CCD2; zeaxanthin 7,8-dioxygenase | ||||||
Systematic name: | zeaxanthin:oxygen 7′,8′-oxidoreductase (bond-cleaving) | ||||||
Comments: | The enzyme, characterized from the plant Crocus sativus (saffron), acts twice, cleaving 3β-hydroxy-β-cyclocitral off each 3-hydroxy end group. It is part of the zeaxanthin degradation pathway in that plant, leading to the different compounds that impart the color, flavor and aroma of the saffron spice. The enzyme can similarly cleave the 7-8 double bond of other carotenoids with a 3-hydroxy-β-carotenoid end group. | ||||||
Links to other databases: | BRENDA, EXPASY, KEGG, MetaCyc | ||||||
References: |
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EC | 1.14.99.42 | ||||||
Transferred entry: | zeaxanthin 7,8-dioxygenase. Now EC 1.13.11.84, crocetin dialdehyde synthase | ||||||
EC | 2.4.1.271 | ||||||
Accepted name: | crocetin glucosyltransferase | ||||||
Reaction: | (1) UDP-α-D-glucose + crocetin = UDP + β-D-glucosyl crocetin (2) UDP-α-D-glucose + β-D-glucosyl crocetin = UDP + bis(β-D-glucosyl) crocetin (3) UDP-α-D-glucose + β-D-gentiobiosyl crocetin = UDP + β-D-gentiobiosyl β-D-glucosyl crocetin |
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For diagram of crocin biosynthesis, click here | |||||||
Other name(s): | crocetin GTase; UGTCs2; UGT75L6; UDP-glucose:crocetin glucosyltransferase; UDP-glucose:crocetin 8-O-D-glucosyltransferase | ||||||
Systematic name: | UDP-α-D-glucose:crocetin 8-O-D-glucosyltransferase | ||||||
Comments: | In the plants Crocus sativus and Gardenia jasminoides this enzyme esterifies a free carboxyl group of crocetin and some crocetin glycosyl esters. The enzyme from Gardenia can also form glucosyl esters with 4-coumarate, caffeate and ferulate [3]. | ||||||
Links to other databases: | BRENDA, EXPASY, KEGG, MetaCyc | ||||||
References: |
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EC | 2.4.1.330 | ||||||
Accepted name: | β-D-glucosyl crocetin β-1,6-glucosyltransferase | ||||||
Reaction: | (1) UDP-α-D-glucose + β-D-glucosyl crocetin = UDP + β-D-gentiobiosyl crocetin (2) UDP-α-D-glucose + bis(β-D-glucosyl) crocetin = UDP + β-D-gentiobiosyl β-D-glucosyl crocetin (3) UDP-α-D-glucose + β-D-gentiobiosyl β-D-glucosyl crocetin = UDP + crocin |
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For diagram of crocin biosynthesis, click here | |||||||
Glossary: | crocin = bis(β-D-gentiobiosyl) crocetin crocetin = (2E,4E,6E,8E,10E,12E,14E)-2,6,11,15-tetramethylhexadeca-2,4,6,8,10,12,14-heptaenedioate |
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Other name(s): | UGT94E5; UDP-glucose:crocetin glucosyl ester glucosyltransferasee | ||||||
Systematic name: | UDP-α-D-glucose:β-D-glucosyl crocetin β-1,6-glucosyltransferase | ||||||
Comments: | The enzyme, characterized from the plant Gardenia jasminoides, adds a glucose to several crocetin glycosyl esters, but not to crocetin (cf. EC 2.4.1.271, crocetin glucosyltransferase). | ||||||
Links to other databases: | BRENDA, EXPASY, KEGG, MetaCyc | ||||||
References: |
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