Fructan beta-(2,6)-fructosidase

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Fructan beta-(2,6)-fructosidase
Identifiers
EC number 3.2.1.154
CAS number 1000597-62-5
Databases
IntEnz IntEnz view
BRENDA BRENDA entry
ExPASy NiceZyme view
KEGG KEGG entry
MetaCyc metabolic pathway
PRIAM profile
PDB structures RCSB PDB PDBe PDBsum

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.[1][2][3] 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 [beta-D-fructofuranosyl-(2->6)-beta-D-fructofuranosyl alpha-D-glucopyranoside] and 6,6-kestotetraose [beta-D-fructofuranosyl-(2->6)-beta-D-fructofuranosyl-(2->6)-beta-D-fructofuranosyl alpha-D-glucopyranoside].

References[edit]

  1. ^ Marx, S.P.; 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. 
  2. ^ Van den Ende, W.; De Coninck, B.; Clerens, S.; Vergauwen, R.; Van Laere, A. (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.)". Plant J. 36: 697–710. doi:10.1046/j.1365-313x.2003.01912.x. PMID 14617070. 
  3. ^ Henson, C.A.; Livingston, D.P. (1996). ", III. Purification and characterization of an oat fructan exohydrolase that preferentially hydrolyzes β-2,6-fructans". Plant Physiol. 110: 639–644. doi:10.1104/pp.110.2.639. PMC 157760Freely accessible. PMID 8742337. 

External links[edit]