Activities in Family	Modules of approx. 100 residues and which are found in a large number of bacterial enzymes. The cellulose-binding function has been demonstrated in many cases. Several of these modules have been shown to also bind chitin or xylan.
3D Structure Status	β-sandwich
Note	Previously known as cellulose-binding domain family II (CBD II).
External resources	CAZypedia; PROSITE;
Statistics	GenBank accession (17082); Uniprot accession (208); PDB accession (19); 3D entries (10); cryst (0)

Archaea
Protein Name	EC#	Organism	GenBank	Uniprot	PDB/3D Carbohydrate Ligands Resolution (Å)
chitinase (PF1234+PF1233;ChiA+ChiB) (Chi18B+Chi18A)		Pyrococcus furiosus DSM 3638	AAL81357.1 NP_578962.1 WP_011012376.1	Q8U1H5	2CWR[A] 1.70 2CZN[A] NMR
chitinase A (ChiA;TK1765)		Thermococcus kodakarensis KOD1	BAD85954.1 CAT70561.1	Q9UWR7	5DHD[A] 1.27
chitinase A (ChiA;TK1765)		Thermococcus kodakarensis KOD1	BAD85954.1 CAT70561.1	Q9UWR7	5DHE[A,B] 1.60
Bacteria
Protein Name	EC#	Organism	GenBank	Uniprot	PDB/3D Carbohydrate Ligands Resolution (Å)
chitinase (ChiA74;Chi)		Bacillus thuringiensis LBIT-82	AAL17867.1 AAL71886.2 ABO21095.1	A0A243G6Q6 A0AB36TST2 A4GT76 Q8RSX8 Q93AD3	6BT9[A,B] 2.26
xylanase D / 11A (XynD;XylD;Xyl11A) (Xyn11A)		Cellulomonas fimi 221	CAA54145.1	P54865	1E5B[A] NMR 1E5C[A] NMR 1XBD[A] NMR 2XBD[A] NMR
xylanase D / 11A (XynD;XylD;Xyl11A) (Xyn11A)		Cellulomonas fimi 221	CAA54145.1	P54865	1HEH[C] NMR 1HEJ[C] NMR
xylanase B / 10A (Cex;Exg;XynB;Celf_1271) (Xyn10A)		Cellulomonas fimi ATCC 484	AEA30147.1 AAA56791.1 AAA56792.1 AAB34464.1 AEE45406.1	F2XFS7 F4H454 P07986 Q59277	1EXG[A] NMR 1EXH[A] NMR 6QFS[A,B,C,D,E,F,G,H] 2.20
endo-β-1,4-glucanase / xylanase D (EngD)		Clostridium cellulovorans ATCC 35269	AAA23233.1	P28623	3ICG[A,B,C,D] 2.10 3NDY[E,F,G,H] 2.10 3NDZ[E,F,G,H] β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp 2.08
chitinase C (ChiC;Chi18aC;ScChiC;2SC6G5.20c;SCO5376) (Chi18C)		Streptomyces coelicolor A3(2)	CAB94547.1 AAD16453.1 BAA75644.1 NP_629515.1	Q7AKG2 Q9S675 Q9Z9M8	2RTT[A] NMR
lytic cellulose monooxygenase 10C (C1-hydroxylating) (CelS2; ScLPMO10C; ScAA10C; SCO1188; SCG11A.19)		Streptomyces coelicolor A3(2)	CAB61600.1 NP_625478.1	Q9RJY2	6F7E[A] NMR
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