Fructan beta-(2,6)-fructosidase

Fructan beta-(2,6)-fructosidase (EC 3.2.1.154, beta-(2-6)-fructan exohydrolase, levanase, 6-FEH, beta-(2,6)-D-fructan fructohydrolase) is an enzyme with systematic name (2->6)-beta-D-fructan fructohydrolase. This enzyme catalyses the following chemical reaction

Hydrolysis of terminal, non-reducing (2->6)-linked beta-D-fructofuranose residues in fructans

The best substrates are the levan-type fructans such as 6-kestotriose and 6,6-kestotetraose .

References

Marx SP, Nösberger J, Frehner M (1997). "Hydrolysis of fructan in grasses: A β-(2-6)-linkage specific fructan-β-fructosidase from stubble of Lolium perenne". New Phytol. 135: 279–290. doi:10.1046/j.1469-8137.1997.00642.x.
Van den Ende W, De Coninck B, Clerens S, Vergauwen R, Van Laere A (December 2003). "Unexpected presence of fructan 6-exohydrolases (6-FEHs) in non-fructan plants: characterization, cloning, mass mapping and functional analysis of a novel "cell-wall invertase-like" specific 6-FEH from sugar beet (Beta vulgaris L.)". The Plant Journal. 36 (5): 697–710. doi:10.1046/j.1365-313x.2003.01912.x. PMID 14617070.
Henson CA, Livingston DP (February 1996). "Purification and characterization of an oat fructan exohydrolase that preferentially hydrolyzes beta-2,6-fructans". Plant Physiology. 110 (2): 639–44. doi:10.1104/pp.110.2.639. PMC 157760. PMID 8742337.

External links

Fructan+beta-(2,6)-fructosidase at the U.S. National Library of Medicine Medical Subject Headings (MeSH)

Hydrolase: sugar hydrolases (EC 3.2)

3.2.1: Glycoside hydrolases

Disaccharidase	Sucrase/Sucrase-isomaltase/Invertase Maltase Trehalase Lactase
Glucosidases	Cellulase Alpha-glucosidase Acid Neutral AB Neutral C Beta-glucosidase cytosolic Debranching enzyme
Other	Amylase Alpha-amylase Chitinase Lysozyme Neuraminidase NEU1 NEU2 NEU3 NEU4 Bacterial neuraminidase Viral neuraminidase Galactosidases Alpha Beta alpha-Mannosidase Glucuronidase Klotho Hyaluronidase Pullulanase Glucosylceramidase lysosomal non-lysosomal Galactosylceramidase Alpha-N-acetylgalactosaminidase NAGA Alpha-N-acetylglucosaminidase Fucosidase Hexosaminidase HEXA HEXB Iduronidase Maltase-glucoamylase Heparanase HPSE2

3.2.2: Hydrolysing
N-Glycosyl compounds

DNA glycosylases: Oxoguanine glycosylase

v t e Enzymes
Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Diffusion-limited enzyme Cofactor Enzyme catalysis
Regulation	Allosteric regulation Cooperativity Enzyme inhibitor Enzyme activator
Classification	EC number Enzyme superfamily Enzyme family List of enzymes
Kinetics	Enzyme kinetics Eadie–Hofstee diagram Hanes–Woolf plot Lineweaver–Burk plot Michaelis–Menten kinetics
Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list) EC7 Translocases (list)

Portal:

Biology

Category:

EC 3.2.1