Activities in Family	Difructose-anhydride-I synthase (EC 4.2.1.179);
Mechanism	Retaining a
3D Structure Status	β-jelly roll
Catalytic Nucleophile/Base	Glu (experimental)
Catalytic Proton Donor	Glu (experimental)
Note	Created after (Kashima et al., JBC, 2021) [PMID=34688653] who demonstrated the difructose dianhydride I synthase/hydrolase activity of aFFase1 protein in Bifidobacterium dentium JCM 1195 = DSM 20436
External resources	CAZypedia;
Statistics	GenBank accession (2113); Uniprot accession (6); PDB accession (6); 3D entries (4); cryst (0)

Bacteria
Protein Name	EC#	Organism	GenBank	Uniprot	PDB/3D Carbohydrate Ligands Resolution (Å)
BACUNI_00161		Bacteroides uniformis ATCC 8492	EDO56131.1		4KQ7[A,B] 1.62
difructose dianhydride I synthase/hydrolase (aFFase1; BBDE_2040)	4.2.1.179 3.2.1.- 3.2.1.-	Bifidobacterium dentium JCM 1195 = DSM 20436	BAQ28034.1	A0A6L9SN29	7V1V[A,B,C,D,E,F] 1.96 7V1W[A,B,C,D,E,F] β-D-Araf 1.86 7V1X[A,B,C,D,E,F] β-D-Fruf 1.76
exo-α-1,5-D-arabinofuranosidase (DgGH172c; HMPREF9455_02479)	3.2.1.-	Dysgonomonas gadei ATCC BAA-286	EGK01287.1	F5IZG2	8AH3[A] 1.40
exo-α-D-arabinofuranosidase (ExoMA1; MIAR_33200)	3.2.1.-	Microbacterium arabinogalactanolyticum JCM 9171	GLC86735.1		8IC8[A,B,C,D,E,F,G,H,I,J, 2.42
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