Levan fructotransferase (DFA-IV-forming)

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In enzymology, a levan fructotransferase (DFA-IV-forming) (EC 4.2.2.16) 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.

[edit] References

IUBMB entry for 4.2.2.16
BRENDA references for 4.2.2.16 (Recommended.)
PubMed references for 4.2.2.16
PubMed Central references for 4.2.2.16
Google Scholar references for 4.2.2.16
Song KB, Bae KS, Lee YB, Lee KY and Rhee SK (2000). "Characteristics of levan fructotransferase from Arthrobacter ureafaciens K2032 and difructose anhydride IV formation from levan". Enzyme Microb. Technol. 27: 212–218. doi:10.1016/S0141-0229(00)00135-6.
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: 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: 1321–7. doi:10.1271/bbb.64.1321. PMID 10945246.