Hydrolases;
Glycosylases;
Glycosidases, i.e. enzymes that hydrolyse O- and S-glycosyl compounds

beta-(2->1)-D-fructan fructohydrolase

Hydrolysis of terminal, non-reducing (2->1)-linked beta-D-fructofuranose residues in fructans

Possesses one of the activities of EC 3.2.1.80, fructan beta-fructosidase. While the best substrates are the inulin-type fructans, such as 1-kestose [beta-D-fructofuranosyl-(2->1)-beta-D-fructofuranosyl alpha-D-glucopyranoside] and 1,1-nystose [beta-D-fructofuranosyl-(2->1)-beta-D-fructofuranosyl-(2->1)-beta-D-fructofuranosyl alpha-D-glucopyranoside], some (but not all) levan-type fructans can also be hydrolysed, but more slowly [see EC 3.2.1.154, fructan beta-(2,6)-fructosidase]. Sucrose, while being a very poor substrate, can substantially inhibit enzyme activity in some cases.

EC 3.2.1.153 created 2005

1

De Roover, J., Van Laere, A., De Winter, M., Timmermans, J.W. and Van den Ende, W.

Purification and properties of a second fructan exohydrolase from the roots of Cichorium intybus.

Physiol. Plant. 106 (1999) 28-34.

2  [PMID:12586886]

Van Den Ende W, Clerens S, Vergauwen R, Van Riet L, Van Laere A, Yoshida M, Kawakami A.

Fructan 1-exohydrolases. beta-(2,1)-trimmers during graminan biosynthesis in stems of wheat? Purification, characterization, mass mapping, and cloning of two fructan 1-exohydrolase isoforms.

Plant. Physiol. 131 (2003) 621-31.

[ag:CAD56806 CAD48199]