Activities in Family	Endo-β-1,4-glucanase (xanthanase) (EC 3.2.1.-); Xyloglucan-specific endo-β-1,4-glucanase / endo-xyloglucanase (EC 3.2.1.151); Exo-β-1,4-glucosaminidase (EC 3.2.1.165); Endo-β-1,4-glucanase (EC 3.2.1.4); Endo-β-1,3(4)-glucanase / lichenase-laminarinase (EC 3.2.1.6); Lichenase / endo-β-1,3-1,4-glucanase (EC 3.2.1.73); Exo-β-1,4-glucanase / cellodextrinase (EC 3.2.1.74); Endo-β-1,4-xylanase (EC 3.2.1.8); Cellobiohydrolase (EC 3.2.1.91);
Mechanism	Inverting e
3D Structure Status	( α / α ) 6 barrel
Catalytic Nucleophile/Base	Asp (experimental)
Catalytic Proton Donor	Glu (experimental)
Note	formerly known as cellulase family E.
External resources	CAZypedia; HOMSTRAD; PROSITE;
Statistics	GenBank accession (7645); Uniprot accession (204); PDB accession (57); 3D entries (22); cryst (0)

Bacteria
Protein Name	EC#	Organism	GenBank	Uniprot	PDB/3D Carbohydrate Ligands Resolution (Å)
cellobiohydrolase (CbhA;Cthe_0413) (Cbh9A)	3.2.1.91	Acetivibrio thermocellus ATCC 27405	ABN51651.1 AAR87745.1	A3DCH2 Q59325 Q6RSN8	1RQ5[A] β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-α-D-Glcp 2.40 1UT9[A] 2.1
endo-β-1,4-glucanase R / cellotetraohydrolase (CelR;Cthe_0578) (Cel9R)	3.2.1.4	Acetivibrio thermocellus ATCC 27405	ABN51814.1	A3DCY5	7UNP[A] 2.00 7V0I[A,B,C] β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp 1.90 7V0J[A,B,C] β-D-Glcp-(1-4)-β-D-Glcp 2.40
endo-β-1,4-glucanase T (CelT;Cthe_2812) (Cel9T)	3.2.1.4	Acetivibrio thermocellus ATCC 27405	ABN54011.1	A3DJ82	2YIK[A] 2.10
endoglucanase Q (CelQ) (Cel9I)	3.2.1.4	Acetivibrio thermocellus F1	BAB33148.1	Q9AJF8	5GXX[A,B] 1.50 5GXY[A,B] β-D-Glcp-(1-4)-β-D-Glcp 1.70 5GXZ[A,B] β-D-Glcp-(1-4)-β-D-Glcp β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp 2.05 5GY0[A,B] β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp 1.74 5GY1[A,B] β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp 1.99
endo-β-1,4-glucanase D (CelD) (Cel9A)	3.2.1.4	Acetivibrio thermocellus NCIB 10682	CAA28255.1	A3DDN1 P04954 P0C2S4	1CLC[A] 1.90 4CJ0[A] 1.10 4CJ1[A] 1.63
endo-β-1,4-glucanase I (CelI;CMC) (Cel9C=Cel9I)	3.2.1.4	Acetivibrio thermocellus NCIB10682 / F7	AAA20892.1 CAB76932.1	Q02934 Q9L3J8	2XFG[A] 1.68
cellulase (CelA;Ac_Cel9A;AaCel9A;Aaci_2475) (Cel9A)	3.2.1.4	Alicyclobacillus acidocaldarius subsp. acidocaldarius DSM 446	ACV59481.1 CAC34051.1	C8WSJ6 Q9AJS0	3EZ8[A] 2.30 3GZK[A] 1.80 3H2W[A] β-D-Glcp β-D-Glcp-(1-4)-α-D-Glcp 2.66 3H3K[A] β-D-Glcp β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-α-D-Glcp 2.10 3RX5[A] β-D-Glcp-(1-4)-β-D-Glcp β-D-Glcp-(1-4)-β-D-Glcp-(1-1)-<non_carb> 1.99 3RX7[A] β-D-Glcp-(1-1)-<non_carb> β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp-(1-1)-<non_carb> 2.02 3RX8[A] β-D-Glcp-(1-1)-<non_carb> 2.56 5E2J[A,B] 2.10
endoglucanase (BLi01880;BL01232;BlCel9)	3.2.1.4	Bacillus licheniformis DSM 13 = ATCC 14580	AAU40775.1 AAU23415.1	Q65JI9	8U49[A] 1.80 8U4A[A] β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp 1.97 8U4F[A] β-D-Glcp β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-D-1-deoxy-Glcp 2.01
endo-xyloglucanase (CelD; BoGH9A; BACOVA_02649; Bovatus_03068)	3.2.1.151	Bacteroides ovatus ATCC 8483	ALJ47676.1	A7LXT3	6DHT[A] 1.42
cellulase (CelA;CbCelA;Athe_1867;Cbes1867;Cbes_1867;CbCBH48A) (Cel9A+Cbh48A)	3.2.1.4	Caldicellulosiruptor bescii DSM 6725	ACM60955.1 CAB06786.1	B9MKU7 P96311	4DOD[A] 1.70 4DOE[A] β-D-Glcp-(1-4)-α-D-Glcp β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp 1.56
endoglucanase (J30; BLM47_05245)	3.2.1.4	Candidatus Reconcilbacillus cellulovorans	PDO10807.1	A0A2A6E235	5U0H[A] 1.70 5U2O[A] 1.46
endo-xanthanase (Xan9; PspXan9)	3.2.1.-	Paenibacillus nanensis 62047 / Paenibacillus sp. 62047	AXR85426.1	A0A346PYN7 A0A3F2YM16 A0A3F2YM17	6FHJ[A] 2.04 6FHN[A] 2.00
exo-β-glucosaminidase (GlcNase;PpGlcNase;PBPRA0520)	3.2.1.165	Photobacterium profundum SS9	CAG18943.1	Q6LUT2	5DGQ[A,B] 1.90 5DGR[A,B] β-D-GlcpN 1.90
endo-β-1,4-glucanase 9G (CelG; Ccel_0731) (Cel9G)	3.2.1.4	Ruminiclostridium cellulolyticum H10	ACL75110.1 AAA73868.1	P37700	1G87[A,B] 1.60 1GA2[A,B] β-D-Glcp-(1-4)-β-D-Glcp β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp 1.70 1K72[A,B] α-D-Glcp β-D-Glcp-(1-4)-α-D-Glcp 1.80 1KFG[A,B] β-D-Glcp4S-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp4S-(1-4)-β-D-Glcp1S 1.90
cellulase M / 9M (CelM; Ccel_0737) (Cel9M)	3.2.1.4	Ruminiclostridium cellulolyticum H10	ACL75116.1 AAG45160.1	B8I7V9 Q9EYQ2	1IA6[A] 1.80 1IA7[A] β-D-Glcp-(1-4)-β-D-Glcp 2.00
endo/exo-β-1,4-glucanase 9A (E4; CelD; TfCel9A; Tfu_2176) (processive) (Cel9A)	3.2.1.4	Thermobifida fusca YX	AAB42155.1 AAA27397.1 AAZ56209.1	P26221 Q47MW0	1JS4[A,B] β-D-Glcp β-D-Glcp-(1-4)-β-D-Glcp β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp 2.00 1TF4[A,B] 1.90 3TF4[A,B] β-D-Glcp β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp 2.20 4TF4[A,B] β-D-Glcp-(1-4)-β-D-Glcp β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-α-D-Glcp 2.00
cellulase (Lc-CelG)	3.2.1.4	uncultured bacterium	AHL27900.1	W8PF21	3X17[A,B] 2.15
β-glucosidase/β-glucosaminidase (BglA;VC0615)	3.2.1.74 3.2.1.165	Vibrio cholerae O1 biovar El Tor str. N16961	AAF93781.1 NP_230264.1	Q9KUA8	6GDT[A,B,C,D,E] 3.17
VP2484		Vibrio parahaemolyticus RIMD 2210633 O3:K6	BAC60747.1 NP_798863.1		3H7L[A,B,C] 2.30
Eukaryota
Protein Name	EC#	Organism	GenBank	Uniprot	PDB/3D Carbohydrate Ligands Resolution (Å)
endo-β-1,4-glucanase (Eg2;EF-EG2)	3.2.1.4	Eisenia fetida	BAM14716.1	I2FI81	3WC3[A] 1.50 8IHW[A] 1.70 8IHX[A] 1.60 8IHY[A] 1.60
endo-β-1,4-glucanase (NtEG;EGA)	3.2.1.4	Nasutitermes takasagoensis	BAA33708.1 BAA76619.1	O77044	1KS8[A] 1.40 1KSC[A] 1.55 1KSD[A] 1.60
endo-β-1,4-glucanase (PnbEG)	3.2.1.4	Perinereis nuntia brevicirris	BAK20401.1	F2Z7L1	4ZG8[A,B] 1.39 4ZH5[A,B] β-D-Glcp-(1-4)-β-D-Glcp 1.35
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