Beta-D-glucopyranosyl abscisate beta-glucosidase explained

Beta-D-glucopyranosyl abscisate beta-glucosidase
Ec Number:	3.2.1.175

Beta-D-glucopyranosyl abscisate beta-glucosidase (AtBG1, ABA-beta-D-glucosidase, ABA-specific beta-glucosidase, ABA-GE hydrolase, beta-D-glucopyranosyl abscisate hydrolase) is an enzyme with systematic name beta-D-glucopyranosyl abscisate glucohydrolase.^{[1] [2] [3]} This enzyme catalyses the following chemical reaction

D-glucopyranosyl abscisate + H₂O

\rightleftharpoons D-glucose + abscisate

The enzyme hydrolyzes the biologically inactive beta-D-glucopyranosyl ester of abscisic acid to produce active abscisate.

Notes and References

1. Lee KH, Piao HL, Kim HY, Choi SM, Jiang F, Hartung W, Hwang I, Kwak JM, Lee IJ, Hwang I . Activation of glucosidase via stress-induced polymerization rapidly increases active pools of abscisic acid . Cell . 126 . 6 . 1109–20 . September 2006 . 16990135 . 10.1016/j.cell.2006.07.034 . free .
2. Kato-Noguchi H, Tanaka Y . Effect of ABA-beta-D-glucopyranosyl ester and activity of ABA-beta-D-glucosidase in Arabidopsis thaliana . Journal of Plant Physiology . 165 . 7 . 788–90 . May 2008 . 17923167 . 10.1016/j.jplph.2007.04.005 .
3. Dietz KJ, Sauter A, Wichert K, Messdaghi D, Hartung W . Extracellular beta-glucosidase activity in barley involved in the hydrolysis of ABA glucose conjugate in leaves . Journal of Experimental Botany . 51 . 346 . 937–44 . May 2000 . 10948220 . 10.1093/jexbot/51.346.937 . free .