Activities in Family	Inulin fructotransferase (DFA-I-forming) (EC 4.2.2.17); Inulin fructotransferase (DFA-III-forming) (EC 4.2.2.18);
Mechanism	Inverting a
3D Structure Status	parallel β-helix
Note	Was temporarily changed into PL19 until it was recently realized that these "PLs" are analogous to GH23 SLTs/lysozymes (there is at least one hydrolase in the GH91 family) and therefore are better classified in the GH category. See CAZypedia (below) for more.
External resources	CAZypedia;
Statistics	GenBank accession (801); Uniprot accession (12); PDB accession (15); 3D entries (4); cryst (0)

Bacteria
Protein Name	EC#	Organism	GenBank	Uniprot	PDB/3D Carbohydrate Ligands Resolution (Å)
inulin fructotransferase (DFA III-producing) (Ift; BsIFTase)	4.2.2.18	Bacillus sp. snu-7	AAZ66341.1	Q3SAG3	2INU[A,B,C] 1.80 2INV[A,B,C] β-D-Fruf 1.80
DFA-III-forming inulin fructotransferase (IfT)	4.2.2.18	Paenarthrobacter aurescens SK 8.001	ADJ19283.1	F8QV43	9J4I[A,B,C] α-D-Glcp-(1-2)-β-D-Fruf 1.96 9J4J[A,B,C] α-D-Glcp-(1-2)-β-D-Fruf β-D-Araf β-D-Fruf 2.80 9J4K[A,B,C] α-D-Glcp-(1-2)-β-D-Fruf 2.20 9J4L[A,B,C]
α-D-fructofuranose-β-D-fructofuranose 2′,1:2,3′-dianhydride hydrolase (AcDFA-IIIase; Achl_2895)	3.2.1.-	Pseudarthrobacter chlorophenolicus A6	ACL40859.1	B8HDZ1	5ZKS[A] 2.00 5ZKU[A,B,C,D,E,F] D-1-deoxy-Araf 2.32 5ZKW[A,B,C,D,E,F] α-D-Glcp-(1-2)-β-D-Fruf 1.86 5ZKY[A] 2.10 5ZL4[A] α-D-Glcp-(1-2)-β-D-Fruf-(1-2)-β-D-Fruf 3.00 5ZL5[A,B,C,D,E,F] 1.65 5ZLA[A,B,C,D,E,F] D-1-deoxy-Araf 1.70
inulin fructotransferase (DFA I-forming) (IFTase; SpIFTase; CGZ69_03210)	4.2.2.17	Streptomyces peucetius subsp. caesius ATCC 27952	ATW47121.1 WP_100105777.1		8HSN[A,B,C] 1.69 8HUI[A,B,C] α-D-Glcp-(1-2)-β-D-Fruf β-D-Fruf D-1-deoxy-Araf 1.44
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