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Information on EC - inulin fructotransferase (DFA-I-forming)

for references in articles please use BRENDA:EC4.2.2.17
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EC Tree
     4 Lyases
         4.2 Carbon-oxygen lyases
             4.2.2 Acting on polysaccharides
       inulin fructotransferase (DFA-I-forming)
IUBMB Comments
This enzyme, like EC [levan fructotransferase (DFA-IV-forming)] and EC [inulin fructotransferase (DFA-III-forming)] eliminates the fructan chain from the terminal disaccharide leaving a difructose dianhydride. These enzymes have long been known as fructotransferases, so this is retained in the accepted name. Since the transfer is intramolecular, the reaction is an elimination and, hence, the enzyme is a lyase, belonging in EC 4.
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The expected taxonomic range for this enzyme is: Bacteria, Eukaryota
EC, IFTase, inulin D-fructosyl-D-fructosyltransferase (1,2':2',1-dianhydride-forming), inulin fructotransferase (depolymerizing, difructofuranose-1,2':2',1-dianhydride-forming), inulin fructotransferase (DFA I-producing), inulin fructotransferase (DFA-I-producing), NBCG_01407, Noca_0068, UG56_016290, more
Produces alpha-D-fructofuranose beta-D-fructofuranose 1,2':2,1'-dianhydride (DFA I) by successively eliminating the diminishing (2->1)-beta-D-fructan (inulin) chain from the terminal D-fructosyl-D-fructosyl disaccharide.
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