Glycoside Hydrolase Family 91

Activities in FamilyDi-fructofuranose 1,2':2,3' dianhydride hydrolase (DFA IIIase) (EC 3.2.1.-);
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 Statusparallel β-helix
NoteWas 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 resourcesCAZypedia;
Statistics GenBank accession (645); Uniprot accession (10); PDB accession (11); 3D entries (3); cryst (0)
Bacteria
Protein Name EC#OrganismGenBankUniprot
PDB/3D Carbohydrate Ligands Resolution (Å)
 inulin fructotransferase (DFA III-producing) (Ift) 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
 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
 CGZ69_03210   Streptomyces peucetius subsp. caesius ATCC 27952 ATW47121.1  
8HSN[A,B,C] 1.69
8HUI[A,B,C] D-1-deoxy-Araf
α-D-Glcp-(1-2)-β-D-Fruf
β-D-Fruf
1.44
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