EC 22.214.171.124 - Fructan β-(2,1)-fructosidase
IntEnz Enzyme Nomenclature
- Hydrolysis of terminal, non-reducing (2right1)-linked beta-D-fructofuranose residues in fructans.
Possesses one of the activities of EC 126.96.36.199, fructan β-fructosidase. While the best substrates are the inulin-type fructans, such as 1-kestose (β-D-fructofuranosyl-(2→1)-β-D-fructofuranosyl α-D-glucopyranoside) and 1,1-nystose (β-D-fructofuranosyl-(2→1)-β-D-fructofuranosyl-(2→1)-β-D-fructofuranosyl α-D-glucopyranoside), some (but not all) levan-type fructans can also be hydrolysed, but more slowly [see EC 188.8.131.52, fructan β-(2,6)-fructosidase]. Sucrose, while being a very poor substrate, can substantially inhibit enzyme activity in some cases.
Links to other databases
Purification and properties of a second fructan exohydrolase from the roots of Cichorium intybus.Physiol. Plant. 106 : 28-34 (1999). [PMID: 16526094]
Fructan 1-exohydrolases. β-(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 : 621-631 (2003). [PMID: 12586886]
[EC 184.108.40.206 created 2005]