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UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
UDP-glucose + (indol-3-yl)acetate
Substrates: -
Products: -
?
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
UDP-glucose + (indol-3-yl)propionate
UDP + 1-O-(indol-3-yl)propionyl-beta-D-glucose
-
Substrates: 22% of the activity with (indol-3-yl)acetate
Products: -
r
UDP-glucose + 1-naphtaleneacetic acid
UDP + ?
Substrates: 70% of the relative activity as compared to (indol-3-yl)acetate
Products: -
?
UDP-glucose + 1-naphthalene acetate
UDP + 1-naphthalene acetyl-beta-D-glucose
-
Substrates: 24% of the activity with (indol-3-yl)acetate
Products: -
r
UDP-glucose + cinnamic acid
UDP + cinnamoyl-beta-1-D-glucose
-
Substrates: -
Products: -
r
UDP-glucose + gibberellin GA3
UDP + ?
-
Substrates: 1.9% of the activity with (indol-3-yl)acetate
Products: -
r
UDP-glucose + indole-3-acetate
1-O-indole-3-acetyl-beta-D-glucose + UDP
UDP-glucose + indole-3-acetate
UDP + indole-3-acetyl-beta-1-D-glucose
-
Substrates: -
Products: -
r
UDP-glucose + indole-3-butyric acid
UDP + ?
Substrates: 66% of the activity as compared to (indol-3-yl)acetate
Products: -
?
UDP-glucose + indole-3-propionic acid
UDP + ?
Substrates: 49.7% of the activity as compared to (indol-3-yl)acetate
Products: -
?
UDP-glucose + phenylacetic acid
UDP + ?
Substrates: 30% of the relative activity as compared to (indol-3-yl)acetate
Products: -
?
UDP-glucose + phenylacetic acid
UDP + phenylacetyl-beta-D-glucose
Substrates: -
Products: -
?
UDPglucose + 2,5-dimethoxycinnamic acid
UDP + 2,5-dimethoxycinnamoyl-beta-1-D-glucose
-
Substrates: 4.3% of the activity with indole-3-acetate
Products: -
?
UDPglucose + 3,4-dimethoxycinnamic acid
UDP + 3,4-dimethoxycinnamoyl-beta-1-D-glucose
-
Substrates: 6.1% of the activity with indole-3-acetate
Products: -
?
UDPglucose + 3-hydroxy-4-methoxy cinnamic acid
UDP + 3-hydroxy-4-methoxycinnamoyl-beta-1-D-glucose
-
Substrates: 9.4% of the activity with indole-3-acetate
Products: -
?
UDPglucose + ferulic acid
UDP + feruloyl-beta-1-D-glucose
-
Substrates: 7.8% of the activity with indole-3-acetate
Products: -
?
UDPglucose + indole butyric acid
UDP + indole butanoyl-beta-1-D-glucose
-
Substrates: -
Products: -
?
UDPglucose + indole propionic acid
UDP + indole propanoyl-beta-1-D-glucose
-
Substrates: -
Products: -
?
UDPglucose + indole-3-acetate
?
UDPglucose + indole-3-acetate
UDP + indole-3-acetyl-beta-1-D-glucose
UDPglucose + m-hydroxycinnamic acid
UDP + m-hydroxycinnamoyl-beta-1-D-glucose
-
Substrates: 4.3% of the activity with indole-3-acetate
Products: -
?
UDPglucose + naphthalene-1-acetic acid
UDP + naphthyl-1-acetyl-beta-1-D-glucose
UDPglucose + o-hydroxycinnamic acid
UDP + o-hydroxycinnamoyl-beta-1-D-glucose
-
Substrates: 7.6% of the activity with indole-3-acetate
Products: -
?
UDPglucose + p-coumaric acid
UDP + p-coumaroyl-beta-1-D-glucose
-
Substrates: 10.2% of the activity with indole-3-acetate
Products: -
?
UDPglucose + phenylacetic acid
UDP + phenylacetyl-beta-1-D-glucose
-
Substrates: -
Products: -
?
additional information
?
-
Substrates: the enzyme shows no catalytic activity towards synthetic auxins, 2,4-dichlorophenoxyacetic acid, Picloram and Dicamba
Products: -
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UDP-glucose + (indol-3-yl)acetate

UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
Substrates: -
Products: -
?
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
-
Substrates: -
Products: -
r
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
-
Substrates: best substrate
Products: -
r
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
-
Substrates: -
Products: -
?
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
Substrates: -
Products: -
?
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
Substrates: -
Products: -
?
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
Substrates: -
Products: -
?
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
Substrates: the enzyme catalyzes a reversible reaction with unfavourable equilibrium that delivers 1-O-(indol-3-yl)acetyl-beta-D-glucose for favourable transacylation to indole-3-acetic acid inositol
Products: -
?
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
Substrates: (indol-3-yl)acetate is a preferred substrate
Products: -
?
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
Substrates: -
Products: -
r
UDP-glucose + indole-3-acetate

1-O-indole-3-acetyl-beta-D-glucose + UDP
-
Substrates: -
Products: -
r
UDP-glucose + indole-3-acetate
1-O-indole-3-acetyl-beta-D-glucose + UDP
-
Substrates: -
Products: -
r
UDPglucose + indole-3-acetate

?
-
Substrates: first enzyme in pathway synthesizing ester conjugates of indoleacetate, constitutive in maize vegetative tissue, can be increased by incubation of tissue with 1-naphthalene acetic acid
Products: -
?
UDPglucose + indole-3-acetate
?
-
Substrates: first reaction in a series leading to the ester conjugates of indole-3-acetic acid
Products: -
?
UDPglucose + indole-3-acetate
?
-
Substrates: first enzyme-catalyzed reaction leading from indole-3-acetic acid to the myo-inositol ester of indole-3-acetate
Products: -
?
UDPglucose + indole-3-acetate

UDP + indole-3-acetyl-beta-1-D-glucose
-
Substrates: -
Products: -
?
UDPglucose + indole-3-acetate
UDP + indole-3-acetyl-beta-1-D-glucose
-
Substrates: specific for UDPglucose
Products: -
r
UDPglucose + indole-3-acetate
UDP + indole-3-acetyl-beta-1-D-glucose
-
Substrates: specific for UDPglucose
Products: i.e. 1-O-indol-3-ylacetyl-beta-D-glucose
?
UDPglucose + indole-3-acetate
UDP + indole-3-acetyl-beta-1-D-glucose
-
Substrates: equilibrium away from ester formation and towards formation of indole-3-acetate
Products: -
r
UDPglucose + naphthalene-1-acetic acid

UDP + naphthyl-1-acetyl-beta-1-D-glucose
-
Substrates: -
Products: -
?
UDPglucose + naphthalene-1-acetic acid
UDP + naphthyl-1-acetyl-beta-1-D-glucose
-
Substrates: 70% of the activity with indole-3-acetate
Products: -
?
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UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
UDP-glucose + (indol-3-yl)acetate
Substrates: -
Products: -
?
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
UDPglucose + indole-3-acetate
?
UDP-glucose + (indol-3-yl)acetate

UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
-
Substrates: -
Products: -
r
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
-
Substrates: -
Products: -
?
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
Substrates: -
Products: -
?
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
Substrates: -
Products: -
?
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
Substrates: -
Products: -
?
UDP-glucose + (indol-3-yl)acetate
UDP + 1-O-(indol-3-yl)acetyl-beta-D-glucose
Substrates: the enzyme catalyzes a reversible reaction with unfavourable equilibrium that delivers 1-O-(indol-3-yl)acetyl-beta-D-glucose for favourable transacylation to indole-3-acetic acid inositol
Products: -
?
UDPglucose + indole-3-acetate

?
-
Substrates: first enzyme in pathway synthesizing ester conjugates of indoleacetate, constitutive in maize vegetative tissue, can be increased by incubation of tissue with 1-naphthalene acetic acid
Products: -
?
UDPglucose + indole-3-acetate
?
-
Substrates: first reaction in a series leading to the ester conjugates of indole-3-acetic acid
Products: -
?
UDPglucose + indole-3-acetate
?
-
Substrates: first enzyme-catalyzed reaction leading from indole-3-acetic acid to the myo-inositol ester of indole-3-acetate
Products: -
?
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evolution
-
the enzyme belongs to the UDP-sugar dependent transferases
malfunction

disruption of OsIAGLU results in low seed vigour in rice, ABA-sensitive phenotypes during seed germination, overview
malfunction
Overexpression of OsIAAGLU results in altered plant architecture. The number of tillers and leaf angle is significantly increased with a concomitant decrease in plant height and panicle length in the transgenic rice lines overexpressing OsIAAGLU compared to the wild-type plants. Phenotypes of iaaglu mutants show no obvious differences with wild-type plants. Overexpression of OsIAAGLU results in reduced sensitivity to indole-3-acetic acid (IAA) and 1-naphthalene acetic acid (NAA) and altered gravitropic response of the roots in the transgenic plants. Free IAA contents in the leaves, root tips, and lamina joint of OsIAAGLU-overexpressing transgenic lines are lower than those of wild-type plants. The transgenic plants are shorter than the wild-type plants and exhibit exaggerated leaf angles at the 5-leaf stage compared to the wild-type plants
malfunction
significant increase in both the indole-3-acetic acid and phenylacetic acid levels in the ugt84b1 null mutants. No obvious developmental phenotypes were observed in the ugt84b1 mutants under laboratory growth conditions. Overexpression of UGT84B1 results in auxin-deficient root phenotypes and changes in the indole-3-acetic acid and phenylacetic acid levels
metabolism

-
the enzyme catalyzes the first step in the biosynthesis of indol-3-yl ester conjugates in monocotyledonous plants
metabolism
the enzyme is involved in biosynthesis pathway of indole-3-acetyl-myo-inositol during development of maize
physiological function

-
1-O-(indol-3-yl)acetyl-beta-D-glucose, synthesized by the enzyme, is the substrate for (indol-3-yl)acetate labeling of glycoproteins from pea seeds indicating a possible role of this enzyme in the covalent modification of a class of proteins by a plant hormone. Auxin is a key plant hormone that regulates many physiological processes in plants including organ morphogenesis (i.e. apical dominance, root development) and environmental responses (biotic and abiotic stress). The major auxin is indole-3-acetic acid (IAA), but other indole-derived carboxylic acids, i.e. indole-3-butyric acid, indole-3-propionic acid, 4-chloro-indole-3-acetic acid, and indole-3-pyruvic acid have also auxin activity. Auxin action is highly dependent on its concentration, which must be precisely controlled
physiological function
the enzyme plays a role on seed vigour in seeds. Transcriptome analysis reveals that the indole-3-acetic acid (IAA)- and abscisic acid (ABA)-related genes are involved in the OsIAGLU regulation of seed vigour in rice. The regulation of seed vigour by OsIAGLU accurs through modulating IAA and ABA levels to alert OsABIs expression in germinating seeds in rice. Based on analysis of single-nucleotide polymorphism data of rice accessions, two haplotypes of OsIAGLU that positively correlate with seed vigour are identified in Oryza sativa subsp. indica accessions. OsIAGLU regulates seed vigour involved in OsABIs expression
physiological function
indole-3-acetic acid glucosyltransferase (OsIAAGLU) catalyzes the reaction of free indole-3-acetic acid (IAA) with glucose to generate IAA-glucose. OsIAAGLU plays a regulatory role in IAA homeostasis and rice architecture
physiological function
the enzyme regulates the levels of indole-3-acetic acid and phenylacetic acid in Arabidopsis
physiological function
the enzyme glucosylates indole-3-acetic acid and thus abolishes its auxinic activity affecting plant hormonal homeostasis
physiological function
-
the enzyme (OsIAGLU) plays a critical role in regulating auxin homeostasis. Overexpression of OsIAGLU disrupts auxin homeostasis, thereby negatively impacting rice growth and development
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Michalczuk, L.; Bandurski, R.S.
Enzymic synthesis of 1-O-indol-3-ylacetyl-beta-D-glucose and indol-3-ylacetyl-myo-inositol
Biochem. J.
207
273-281
1982
Zea mays
brenda
Kowalczyk, S.; Bandurski, R.S.
Isomerization of 1-O-indol-3-ylacetyl-beta-D-glucose. Enzymatic hydrolysis of 1-O-, 4-O-, and 6-O-indol-3-ylacetyl-beta-D-glucose and the enzymatic synthesis of indole-3-acetyl glycerol by a hormone metabolizing complex
Plant Physiol.
94
4-12
1990
Zea mays
brenda
Leznicki, A.J.; Bandurski, R.S.
Enzymic synthesis of indole-3-acetyl-1-O-beta-D-glucose
Plant Physiol.
88
1474-1480
1988
Zea mays
brenda
Leznicki, A.J.; Bandurski, R.S.
Enzymic synthesis of indole-3-acetyl-1-O-beta-D-glucose
Plant Physiol.
88
1481-1485
1988
Zea mays
brenda
Kowalczyk, S.; Bandurski, R.S.
Enzymic synthesis of 1-O-(indol-3-ylacetyl)-beta-D-glucose. Purification of the enzyme from Zea mays, and preparation of antibodies to the enzyme
Biochem. J.
279
509-514
1991
Zea mays
brenda
Kowalczyk, S.; Jakubowska, A.; Bandurski, R.S.
1-Naphtalene acetic acid induces indole-3-ylacetylglucose synthase in Zea mays seedling tissue
Plant Growth Regul.
38
127-134
2002
Zea mays
-
brenda
Jackson, R.G.; Lim, E.K.; Li, Y.; Kowalczyk, M.; Sandberg, G.; Hoggett, J.; Ashford, D.A.; Bowles, D.J.
Identification and biochemical characterization of an Arabidopsis indole-3-acetic acid glucosyltransferase
J. Biol. Chem.
276
4350-4356
2001
Arabidopsis sp.
brenda
Jakubowska, A.; Kowalczyk, S.
The auxin conjugate 1-O-indole-3-acetyl-beta-D-glucose is synthesized in immature legume seeds by IAGlc synthase and may be used for modification of some high molecular weight compounds
J. Exp. Bot.
55
791-801
2004
Brassica napus, Lathyrus oleraceus
brenda
Ostrowski, M.; Hetmann, A.; Jakubowska, A.
Indole-3-acetic acid UDP-glucosyltransferase from immature seeds of pea is involved in modification of glycoproteins
Phytochemistry
117
25-33
2015
Lathyrus oleraceus
brenda
He, Y.; Zhao, J.; Yang, B.; Sun, S.; Peng, L.; Wang, Z.
Indole-3-acetate beta-glucosyltransferase OsIAGLU regulates seed vigour through mediating crosstalk between auxin and abscisic acid in rice
Plant Biotechnol. J.
18
1933-1945
2020
Oryza sativa Japonica Group (Q10RB7)
brenda
Yu, X.L.; Wang, H.Y.; Leung, D.W.M.; He, Z.D.; Zhang, J.J.; Peng, X.X.; Liu, E.E.
Overexpression of OsIAAGLU reveals a role for IAA-glucose conjugation in modulating rice plant architecture
Plant Cell Rep.
38
731-739
2019
Oryza sativa Japonica Group (A0A0P0W2E0)
brenda
Aoi, Y.; Hira, H.; Hayakawa, Y.; Liu, H.; Fukui, K.; Dai, X.; Tanaka, K.; Hayashi, K.I.; Zhao, Y.; Kasahara, H.
UDP-glucosyltransferase UGT84B1 regulates the levels of indole-3-acetic acid and phenylacetic acid in Arabidopsis
Biochem. Biophys. Res. Commun.
532
244-250
2020
Arabidopsis thaliana (O22182)
brenda
Ciarkowska, A.; Ostrowski, M.; Kozakiewicz, A.
Biochemical characterization of recombinant UDPG-dependent IAA glucosyltransferase from maize (Zea mays)
Int. J. Mol. Sci.
22
3355
2021
Zea mays (Q41819)
brenda
Ostrowski, M.; Ciarkowska, A.; Dalka, A.; Wilmowicz, E.; Jakubowska, A.
Biosynthesis pathway of indole-3-acetyl-myo-inositol during development of maize (Zea mays L.) seeds
J. Plant Physiol.
245
153082
2020
Zea mays (Q41819)
brenda
Chen, G.; Fu, X.; Ruan, X.; Yu, X.; Hou, D.; Xu, H.
Upregulation of an IAA-glucosyltransferase OsIAGLU in rice (Oryza sativa L.) impairs root gravitropism by disrupting starch granule homeostasis
Plants (Basel)
14
1557
2025
Oryza sativa
brenda