Ligand abscisic acid

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Basic Ligand Information

Molecular Structure
Picture of abscisic acid (click for magnification)
Molecular Formula
BRENDA Name
InChIKey
C15H20O4
abscisic acid
JLIDBLDQVAYHNE-YKALOCIXSA-N
Synonyms:
(+)-(S)-abscisic acid, (+)-abscisate, (+)-abscisic acid, (+)-S-abscisate, (1'S)-(+)-abscisate, (2Z,4E)-5-[(1S)-1-hydroxy-2,6,6-trimethyl-4-oxocyclohex-2-en-1-yl]-3-methylpenta-2,4-dienoic acid, (S)-abscisate, abscisate, cis-(+)-abscisic acid, L-abscisic acid, S-(+)-abscisic acid, S-abscisate

Roles as Enzyme Ligand

In Vivo Substrate in Enzyme-catalyzed Reactions (5 results)

EC NUMBER
PROVEN IN VIVO REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE

In Vivo Product in Enzyme-catalyzed Reactions (3 results)

EC NUMBER
PROVEN IN VIVO REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
abscisic aldehyde + H2O + O2 = abscisic acid + H2O2
show the reaction diagram
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abscisic aldehyde + H2O + O2 = abscisate + H2O2
show the reaction diagram
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beta-D-glucopyranosyl abscisate + H2O = beta-D-glucopyranose + abscisate
show the reaction diagram
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Substrate in Enzyme-catalyzed Reactions (9 results)

EC NUMBER
REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE

Product in Enzyme-catalyzed Reactions (9 results)

EC NUMBER
REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
abscisic aldehyde + oxidized 2,6-dichloroindophenol + H2O = abscisic acid + reduced 2,6-dichloroindophenol
show the reaction diagram
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Activator in Enzyme-catalyzed Reactions (38 results)

EC NUMBER
COMMENTARY
LITERATURE
ENZYME 3D STRUCTURE
increase in enzyme gene expression
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0.05 mM, incubation for 12 h, significantly increased activity
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0.1 mM, significant enhancement of activity 24 h after treatment
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as well as treatments like spikelet thinning, leaf cutting increase enzyme expression and enzyme activity during rice grain filling
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in concentration of 50 and 150 micromol/l
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induces the expression of isozymes DPK1-DPK3 in seedlings
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induces production of the protein
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rapid induction of isoform PLDbeta1, enzyme stimulates abscisic acid signaling by activating SAP kinase, thus repressing GAmyb expression and inhibiting seed germination
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ABA, significantly increases glucosinolate content, isothiocyanate formation and myrosinase activity by 72.65%, 268.15% and 67.69%, respectively, at 0.05 mg/ml in 5-day-old sprouts
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1.49fold increased enzyme activity after application of 100 micromo/l abscisic acid for 6 h
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mRNA level of ADC is induced in the shoots subjected to the concentration of 0.2 mM abscisic acid. After treatment of peach shoots with 0.1 mM abscisic acid to study time-course change of ADC expression over 2 days, are markable increase of the expression level is observed 1 h after the treatment, followed by quick decline until the end of treatment.
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exogenous application of abscisic acid (up to 0.08 mM) enhances PAL activity
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exogenous treatment with abscisic acid increases the promoter activity of ACS4
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plant hormone abscisic acid slightly induces the enzyme expression and highly increases the enzyme's H+-translocation activity
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abscisic acid markedly induces the expression of HVP1 and slightly increased the expression of HVP10, treatment with abscisic acid and 2,4-dinitrophenol increases Na+/H+ antiport activity and proton translocating activities by H+-PPase and H+-ATPase in tonoplast vesicles, and treatment with abscisic acid also increases the amount of V-PPase protein of tonoplast vesicles, overview
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Inhibitor in Enzyme-catalyzed Reactions (7 results)

EC NUMBER
COMMENTARY
LITERATURE
ENZYME 3D STRUCTURE
decreases expression
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weak
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in concentration of 250 micromol/l
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In ten-day-old seedlings grown on MS medium, AtIpk2b transcript level decreased.
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presence of exogenous abscisic acid provokes a delay in the cellular disassembly of the endosperm and disappearance of endo-beta-mannanase in the tissue, resulting in delayed galactomannan degradation
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3D Structure of Enzyme-Ligand-Complex (PDB) (196 results)

EC NUMBER
ENZYME 3D STRUCTURE

Enzyme Kinetic Parameters

KM Value (5 results)

EC NUMBER
KM VALUE [MM]
KM VALUE MAXIMUM [MM]
COMMENTARY
LITERATURE
0.4
-
apparent value, at pH 5.0, temperature not specified in the publication

References & Links

Links to other databases for abscisic acid

ChEBI
PubChem
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PubChem