KEGG   ENZYME: 2.4.1.191Help
Entry
EC 2.4.1.191                Enzyme                                 

Name
luteolin-7-O-diglucuronide 4'-O-glucuronosyltransferase;
uridine diphosphoglucuronate-luteolin 7-O-diglucuronide glucuronosyltransferase;
UDP-glucuronate:luteolin 7-O-diglucuronide-glucuronosyltransferase;
UDPglucuronate:luteolin 7-O-diglucuronide-4'-O-glucuronosyl-transferase;
LDT;
UDP-glucuronate:luteolin-7-O-beta-D-diglucuronide 4'-O-glucuronosyltransferase
Class
Transferases;
Glycosyltransferases;
Hexosyltransferases
BRITE hierarchy
Sysname
UDP-alpha-D-glucuronate:luteolin-7-O-beta-D-diglucuronide 4'-O-glucuronosyltransferase (configuration-inverting)
Reaction(IUBMB)
UDP-alpha-D-glucuronate + luteolin 7-O-[beta-D-glucuronosyl-(1->2)-beta-D-glucuronide] = UDP + luteolin 7-O-[beta-D-glucuronosyl-(1->2)-beta-D-glucuronide]-4'-O-beta-D-glucuronide [RN:R06828]
Reaction(KEGG)
Substrate
UDP-alpha-D-glucuronate [CPD:C00167];
luteolin 7-O-[beta-D-glucuronosyl-(1->2)-beta-D-glucuronide] [CPD:C12632]
Product
UDP [CPD:C00015];
luteolin 7-O-[beta-D-glucuronosyl-(1->2)-beta-D-glucuronide]-4'-O-beta-D-glucuronide [CPD:C04900]
Comment
The enzyme participates in the biosynthesis of luteolin triglucuronide, the major flavone found in the photosynthetically-active mesophyll of the primary leaves of Secale cereale (rye).
History
EC 2.4.1.191 created 1992, modified 2011
Pathway
Flavone and flavonol biosynthesis
Reference
1
  Authors
Schulz, M. and Weissenbock, G.
  Title
3 specific UDP-glucuronate-flavone-glucuronosyl-transferases from primary leaves of Secale cereale.
  Journal
Phytochemistry 27 (1988) 1261-1267.
Other DBs
ExplorEnz - The Enzyme Database: 
IUBMB Enzyme Nomenclature: 
ExPASy - ENZYME nomenclature database: 
BRENDA, the Enzyme Database: 
CAS: 
115490-50-1

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