Activities in Family	Modules of approx. 160 residues found mostly at the C-terminus of GH54 catalytic domains. Binding to arabinofuranose (present in arabinoxylan) has been demonstrated.
3D Structure Status	β-trefoil
Note	Created following a paper by Miyanaga A, Koseki T, Matsuzawa H, Wakagi T, Shoun H, Fushinobu S (2004) J.Biol. Chem. 279:44907-44914 (PMID: 15292273)
External resources	CAZypedia;
Commercial Enzyme Provider(s)	NZYTech; PROZOMIX;
Statistics	GenBank accession (1739); Uniprot accession (26); PDB accession (12); 3D entries (3); cryst (0)

Bacteria
Protein Name	EC#	Organism	GenBank	Uniprot	PDB/3D Carbohydrate Ligands Resolution (Å)
Cthe_0015 (CBM42A)		Acetivibrio thermocellus ATCC 27405	ABN51257.1		3KMV[A,B,C,D,E,F,G,H] 1.80
exo-α-1,5-L-arabinofuranosidase (SaAraf43A; SAV1043) (Araf43A)		Streptomyces avermitilis MA-4680 = NBRC 14893	BAC68753.1 NP_822218.1	Q82P90	3AKF[A] 2.20 3AKG[A] α-L-Araf α-L-Araf-(1-5)-α-L-Araf 1.80 3AKH[A] α-L-Araf α-L-Araf-(1-5)-α-L-Araf 1.70 3AKI[A] α-L-Araf1N-(1-1)-<non_carb> 2.00
Eukaryota
Protein Name	EC#	Organism	GenBank	Uniprot	PDB/3D Carbohydrate Ligands Resolution (Å)
α-L-arabinofuranosidase B (AbfB;AkAbfB) (Abf54)		Aspergillus kawachii IFO 4308	BAB96816.1	Q8NK89	1WD3[A] 1.75 1WD4[A] α-L-Araf 2.07 2D43[1] α-L-Araf-(1-5)-α-L-Araf 2.80 2D44[1] α-L-Araf-(1-2)-β-D-Xylp-(1-4)-β-D-Xylp 2.30 6SXR[A] α-L-Araf-(1-1)-<non_carb> 1.64 6SXS[AAA] 6SXT[A] 1.47
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