Levan fructotransferase (DFA-IV-forming)

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Levan fructotransferase (DFA-IV-forming)
EC number
IntEnz IntEnz view
ExPASy NiceZyme view
MetaCyc metabolic pathway
PRIAM profile
PDB structures RCSB PDB PDBe PDBsum

In enzymology, a levan fructotransferase (DFA-IV-forming) (EC is an enzyme that catalyzes the chemical reaction

Produces di-beta-D-fructofuranose 2,6':2',6-dianhydride (DFA IV) by successively eliminating the diminishing (2->6)-beta-D-fructan (levan) chain from the terminal D-fructosyl-D-fructosyl disaccharide

This enzyme belongs to the family of lyases, specifically those carbon-oxygen lyases acting on polysaccharides. The systematic name of this enzyme class is 2,6-beta-D-fructan lyase (di-beta-D-fructofuranose-2,6':2',6-dianhydride-forming). Other names in common use include 2,6-beta-D-fructan D-fructosyl-D-fructosyltransferase (forming, di-beta-D-fructofuranose 2,6':2',6-dianhydride), and levan fructotransferase.


  • Song KB, Bae KS, Lee YB, Lee KY, Rhee SK (2000). "Characteristics of levan fructotransferase from Arthrobacter ureafaciens K2032 and difructose anhydride IV formation from levan". Enzyme and Microbial Technology. 27 (3–5): 212–218. doi:10.1016/S0141-0229(00)00135-6. 
  • Rhee SK; Ryu, EJ; Park, BS; Song, KB; Kang, SA; Kim, CH; Uhm, TB; Park, YI; Rhee, SK (2003). "Levan fructotransferase from Arthrobacter oxydans J17-21 catalyzes the formation of the di-D-fructose dianhydride IV from levan". J. Agric. Food Chem. 51 (9): 2632–6. doi:10.1021/jf026207o. PMID 12696949. 
  • Saito K, Tomita F (2000). "Difructose anhydrides: their mass-production and physiological functions". Biosci. Biotechnol. Biochem. 64 (7): 1321–7. doi:10.1271/bbb.64.1321. PMID 10945246.