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EC Tree
IUBMB Comments 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).
The expected taxonomic range for this enzyme is: Secale cereale
Synonyms
glucuronosyltransferase, uridine diphosphoglucuronate-luteolin 7-O-diglucuronide, LDT, UDP-glucuronate:luteolin 7-O-diglucuronide-glucuronosyltransferase, UDPglucuronate:luteolin 7-O-diglucuronide-4'-O-glucuronosyl-transferase,
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glucuronosyltransferase, uridine diphosphoglucuronate-luteolin 7-O-diglucuronide
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UDP-glucuronate:luteolin 7-O-diglucuronide-glucuronosyltransferase
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UDPglucuronate:luteolin 7-O-diglucuronide-4'-O-glucuronosyl-transferase
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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
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hexosyl group transfer
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UDP-glucuronate:luteolin-7-O-beta-D-diglucuronide 4'-O-glucuronosyltransferase
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).
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UDP-galactose + 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-galactoside
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7.5% of activity with UDPglucuronic acid
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UDP-glucose + 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-glucoside
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10% of activity with UDPglucuronic acid
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UDP-glucuronic acid + 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
UDP-glucuronic acid + luteolin-7-O-glucuronide
UDP + luteolin 7-O-beta-D-glucuronosyl-4'-O-glucuronide
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UDP-xylose + 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-xyloside
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10% of activity with UDPglucuronic acid
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UDPglucuronic acid + luteolin-7-O-glucuronide
UDP + luteolin 7-O-beta-D-glucuronosyl-4'-O-glucuronide
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34% of activity with luteolin 7-O-diglucuronide
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UDP-glucuronic acid + 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
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UDP-glucuronic acid + 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
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ir
UDP-glucuronic acid + 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
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involved in the sequential biosynthesis of luteolin triglucuronide
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ir
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UDP-glucuronic acid + 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
UDP-glucuronic acid + 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
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UDP-glucuronic acid + 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
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involved in the sequential biosynthesis of luteolin triglucuronide
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ir
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additional information
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not affected by Ca2+ or Mg2+ up to 0.5 and 0.75 mM
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luteolin
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0.02 mM, 50% inhibition
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0.009
Luteolin 7-O-diglucuronide
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0.09
UDPglucuronic acid
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6 - 9
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50% of maximal activity at pH 6 and pH 9
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rye
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brenda
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brenda
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mesophyll protoplasts
brenda
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probably
brenda
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freezing without glycerol, complete loss of activity
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-20°C, 50% glycerol, 3 months, 30-50% loss of activity
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Ultrogel AcA 44, Sephadex G-25, ultrafiltration, partial purification
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Schulz, M.; Weissenbck, G.
Three specific UDP-glucuronate: flavone-glucuronosyl-transferases from primary leaves of Secale cereale
Phytochemistry
27
1261-1267
1988
Secale cereale
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brenda
Anhalt, S.; Weissenbck, G.
Subcellular localization of luteolin glucuronides and related enzymes in rye mesophyll
Planta
187
83-88
1992
Secale cereale
brenda
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