Biology:Crocetin glucosyltransferase

From HandWiki
Short description: Class of enzymes
Crocetin glucosyltransferase
Identifiers
EC number2.4.1.271
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum

Crocetin glucosyltransferase (EC 2.4.1.271, crocetin GTase, UGTCs2) is an enzyme with systematic name UDP-glucose:crocetin 8-O-D-glucosyltransferase.[1][2] This enzyme catalyses the following chemical reaction

(1) UDP-glucose + crocetin [math]\displaystyle{ \rightleftharpoons }[/math] UDP + beta-D-glucosyl crocetin
(2) UDP-glucose + beta-D-glucosyl crocetin [math]\displaystyle{ \rightleftharpoons }[/math] UDP + bis(beta-D-glucosyl) crocetin
(3) UDP-glucose + beta-D-gentiobiosyl crocetin [math]\displaystyle{ \rightleftharpoons }[/math] UDP + beta-D-gentiobiosyl beta-D-glucosyl crocetin

In Crocus sativus this enzyme esterifies a free carboxyl group of crocetin or crocetin glycosyl ester.

References

  1. "Properties of a glucosyltransferase involved in crocin synthesis". Plant Sci. 153: 55–63. 2000. doi:10.1016/S0168-9452(99)00248-4. 
  2. "Glucosylation of the saffron apocarotenoid crocetin by a glucosyltransferase isolated from Crocus sativus stigmas". Planta 219 (6): 955–66. October 2004. doi:10.1007/s00425-004-1299-1. PMID 15605174. 

External links