- Source: Levan fructotransferase (DFA-IV-forming)
The enzyme levan fructotransferase (DFA-IV-forming) (EC 4.2.2.16) catalyzes the following process:
Produces di-β-D-fructofuranose 2,6′:2′,6-dianhydride (DFA IV) by successively eliminating the diminishing (2→6)-β-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-β-D-fructan lyase (di-β-D-fructofuranose-2,6′:2′,6-dianhydride-forming).
Other names in common use include 2,6-β-D-fructan D-fructosyl-D-fructosyltransferase (forming, di-β-Dfructofuranose 2,6′:2′,6-dianhydride), and levan fructotransferase.
References
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.