3.2.1.175: beta-D-glucopyranosyl abscisate beta-glucosidase
This is an abbreviated version!
For detailed information about beta-D-glucopyranosyl abscisate beta-glucosidase, go to the full flat file.
Word Map on EC 3.2.1.175
-
3.2.1.175
-
abscisic
-
stomatal
-
glucose-conjugated
-
dehydration
-
phytohormone
- 3.2.1.175
-
abscisic
-
stomatal
-
glucose-conjugated
- dehydration
-
phytohormone
Reaction
Synonyms
ABA-beta-D-glucosidase, ABA-GE hydrolyzing activity, AtBG1, beta-glucosidase homolog 1, beta-glucosidase homolog 2, BG1, BG2
ECTree
Advanced search results
General Information
General Information on EC 3.2.1.175 - beta-D-glucopyranosyl abscisate beta-glucosidase
Please wait a moment until all data is loaded. This message will disappear when all data is loaded.
malfunction
metabolism
abscisic acid is a phytohormone critical for plant growth. Dehydration rapidly induces polymerization of the beta-D-glucopyranosyl abscisate hydrolyzing enzyme AtBG1, resulting in a 4fold increase in enzymatic activity. Diurnal increases in abscisate levels are attributable to polymerization-mediated AtBG1 activation. Activation of inactive abscisate pools by polymerized AtBG1 is a mechanism by which plants rapidly adjust abscisate levels and respond to changing environmental cues
physiological function
atbg1 plants exhibit abscisate deficiency and show decreased seed abscisate levels and a slightly decreased level of dehydration induced abscisate accumulation
malfunction
loss of AtBG1 causes defective stomatal movement, early germination, abiotic stress-sensitive phenotypes, and lower abscisate levels, whereas plants with ectopic AtBG1 accumulate higher abscisate levels and display enhanced tolerance to abiotic stress
malfunction
multiple Arabidopsis thaliana bg2 alleles with a T-DNA insertion in BG2 are more sensitive to dehydration and NaCl stress compared to the wild-type enzyme, whereas BG2 overexpression results in enhanced resistance to dehydration and NaCl stress
malfunction
-
multiple Arabidopsis thaliana bg2 alleles with a T-DNA insertion in BG2 are more sensitive to dehydration and NaCl stress compared to the wild-type enzyme, whereas BG2 overexpression results in enhanced resistance to dehydration and NaCl stress
-
in addition to the de novo biosynthesis, abscisic acid is produced in multiple organelles by organelle-specific beta-glucosidases in response to abiotic stresses. BG2 increases abscisic acid levels in protoplasts upon application of exogenous Glc-conjugated abscisic acid
physiological function
in Arabidopsis thaliana, abscisic acid levels are increased both through de novo biosynthesis and via beta-glucosidase homolog 1-mediated hydrolysis of Glc-conjugated abscisic acid. In addition to the de novo biosynthesis, abscisic acid is produced in multiple organelles by organelle-specific beta-glucosidases in response to abiotic stresses
physiological function
-
the Arabidopsis beta-glucosidase AtBG1 hydrolyzes glucose-conjugated, biologically inactive abscisic acid to produce active abscisic acid, which increases the level of abscisic acid in plants. The phytohormone abscisic acid is critical for growth, development, and survival of plants in response to environmental stresses
physiological function
-
in addition to the de novo biosynthesis, abscisic acid is produced in multiple organelles by organelle-specific beta-glucosidases in response to abiotic stresses. BG2 increases abscisic acid levels in protoplasts upon application of exogenous Glc-conjugated abscisic acid
-
physiological function
-
in Arabidopsis thaliana, abscisic acid levels are increased both through de novo biosynthesis and via beta-glucosidase homolog 1-mediated hydrolysis of Glc-conjugated abscisic acid. In addition to the de novo biosynthesis, abscisic acid is produced in multiple organelles by organelle-specific beta-glucosidases in response to abiotic stresses
-