ExplorEnz: EC 3.2.1.175

Your query returned 1 entry. Printable version

3.2.1.175

Accepted name:

β-D-glucopyranosyl abscisate β-glucosidase

Reaction:

D-glucopyranosyl abscisate + H₂O = D-glucose + abscisate

For diagram of abscisic-acid biosynthesis, click here

Other name(s):

AtBG1; ABA-β-D-glucosidase; ABA-specific β-glucosidase; ABA-GE hydrolase; β-D-glucopyranosyl abscisate hydrolase

Systematic name:

β-D-glucopyranosyl abscisate glucohydrolase

Comments:

The enzyme hydrolzes the biologically inactive β-D-glucopyranosyl ester of abscisic acid to produce active abscisate. Abscisate is a phytohormone critical for plant growth, development and adaption to various stress conditions. The enzyme does not hydrolyse β-D-glucopyranosyl zeatin [1].

Links to other databases:

BRENDA, EXPASY, KEGG, MetaCyc

References:

1.	Lee, K.H., Piao, H.L., Kim, H.Y., Choi, S.M., Jiang, F., Hartung, W., Hwang, I., Kwak, J.M., Lee, I.J. and Hwang, I. Activation of glucosidase via stress-induced polymerization rapidly increases active pools of abscisic acid. Cell 126 (2006) 1109–1120. [DOI] [PMID: 16990135]
2.	Kato-Noguchi, H. and Tanaka, Y. Effect of ABA-β-D-glucopyranosyl ester and activity of ABA-β-D-glucosidase in Arabidopsis thaliana. J. Plant Physiol. 165 (2008) 788–790. [DOI] [PMID: 17923167]
3.	Dietz, K.J., Sauter, A., Wichert, K., Messdaghi, D. and Hartung, W. Extracellular β-glucosidase activity in barley involved in the hydrolysis of ABA glucose conjugate in leaves. J. Exp. Bot. 51 (2000) 937–944. [DOI] [PMID: 10948220]

[EC 3.2.1.175 created 2011]