Activities in Family	endoglucanase (EC 3.2.1.4); endo-β-1,3(4)-glucanase / lichenase-laminarinase (EC 3.2.1.6); β-glucosidase (EC 3.2.1.21); lichenase / endo-β-1,3-1,4-glucanase (EC 3.2.1.73); exo-β-1,4-glucanase / cellodextrinase (EC 3.2.1.74); cellobiohydrolase (EC 3.2.1.91); xyloglucan-specific endo-β-1,4-glucanase / endo-xyloglucanase (EC 3.2.1.151); exo-β-glucosaminidase (EC 3.2.1.165); endo-β-1,4-glucanase (xanthanase) (EC 3.2.1.-)
Mechanism	Inverting
3D Structure Status	( α / α ) 6
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 (4602); Uniprot accession (658); PDB accession (47); 3D entries (20); cryst (0)

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Bacteria
Protein Name	EC#	Organism	GenBank	Uniprot	PDB/3D
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] 3GZK[A] 3H2W[A] 3H3K[A] 3RX5[A] 3RX7[A] 3RX8[A] 5E2J[A,B]
endoglucanase (Cel3;TC41_2767)	3.2.1.4	Alicyclobacillus acidocaldarius subsp. acidocaldarius Tc-4-1	AEJ44660.1
β-1,3(4)-glucanase	3.2.1.6	Alicyclobacillus sp. A4	ADH59533.1	D7PC10
endoglucanase (BLi01880;BL01232;BlCel9)	3.2.1.4	Bacillus licheniformis DSM 13 = ATCC 14580	AAU40775.1 AAU23415.1	Q65JI9
cellulase (Cel9A) (Cel9A)	3.2.1.4	Bacillus licheniformis GXN151	AAR29083.1	Q6SYB5
endo-β-1,4-glucanase A (EglA)	3.2.1.4	Bacillus pumilus CL16	AAQ91573.1	Q5YLG1
endo-β-1,4-glucanase	3.2.1.4	Bacillus pumilus S-27	AAF15367.1	Q9R9H6
endo-β-1,4-glucanase IV	3.2.1.4	Bacillus sp. (in: Bacteria) KSM-522	BAA24918.1	P28622
endoglucanase A (Ega;Bα-EGA)	3.2.1.4	Bacillus sp. AC-1	ABM68635.1	A6Y862
cellulase (CelA20)	3.2.1.4	bacterium enrichment culture clone CelA20	ACR23658.1	C5HG55
endo-xyloglucanase (CelD;BoGH9A;BACOVA_02649;Bovatus_03068)	3.2.1.151	Bacteroides ovatus ATCC 8483	ALJ47676.1		6DHT[A]
endo-1,4-glucanase C (Ced1)	3.2.1.4	Butyrivibrio fibrisolvens H17C	CAA39264.1	P23658
cellulase (CelA;CbCelA;Athe_1867;Cbes1867;Cbes_1867;CbCBH48A) (Cel9A+Cbh48A)	3.2.1.176 3.2.1.4	Caldicellulosiruptor bescii DSM 6725	ACM60955.1 CAB06786.1	B9MKU7 P96311	4DOD[A] 4DOE[A]
bifunctional cellulase / β-mannanase (CelC-ManB;CbCel9B/Man5A;Athe_1865;Cbes_1865;Orf1952) (Cel9B-Man5A)	3.2.1.4 3.2.1.78	Caldicellulosiruptor bescii DSM 6725	ACM60953.1	B9MKU5
endo-β-1,3-1,4-glucanase (Cel19;Calkr_2522)	3.2.1.73	Caldicellulosiruptor kristjanssonii I77R1B	ADQ41951.1	E4S8G9
endo-β-1,4-glucanase B (CenB;Celf_0019) (Cel9A)	3.2.1.4	Cellulomonas fimi ATCC 484	AAA23086.1 AEE44171.1	P26225
endo-β-1,4-glucanase C (CenC) (Cel9B)	3.2.1.4	Cellulomonas fimi ATCC 484	CAA40993.1 AAA23088.1 AEE45671.1	P14090
endoglucanase (CBP105) (processive)	3.2.1.4	Cellulomonas flavigena CDBB-531	AAW62376.2	Q3ZMA8
endo-β-1,4-glucanase A (CelA;CJA_2472) (Cel9A)	3.2.1.4	Cellvibrio japonicus Ueda107	ACE85757.1 ARU79885.1 CAA31082.1	B3PKK4 P10476
endoglucanase (CelG;CAC0916)	3.2.1.4	Clostridium acetobutylicum ATCC 824	AAK78892.1 NP_347552.1	Q97KK3
endoglucanase O (EngO)	3.2.1.4	Clostridium cellulovorans	AAT66046.1	Q6DTY2
endo-β-1,4-glucanase (EngZ;NC1;Clocel_2741)	3.2.1.4	Clostridium cellulovorans 743B	ADL52438.1 YP_003844202.1	D9SRK9
endo-β-1,4-glucanase K (EngK)	3.2.1.4	Clostridium cellulovorans 743B	AAF06107.1	Q9RGE8
endo-β-1,4-glucanase L (EngL;Clocel_2819)	3.2.1.4	Clostridium cellulovorans 743B	AAF06109.1 ADL52515.1	C5RQ37 D9SS68 Q9RGE6
endo-β-1,4-glucanase M (EngM)	3.2.1.4	Clostridium cellulovorans 743B	AAF06111.2	Q9LAJ2
endo-β-1,4-glucanase Y (EngY)	3.2.1.4	Clostridium cellulovorans ATCC 35269	AAG59608.1	Q9AQF4
endo-β-1,4-glucanase H (EngH)	3.2.1.4	Clostridium cellulovorans ATCC 35296	AAC38572.2	O65987
endoglucanase 9A (CHU_1336) (Cel9A)	3.2.1.4	Cytophaga hutchinsonii ATCC 33406	ABG58608.1	Q11VF8
endoglucanase / cellulose-binding protein A / E1 (Cbpe1;CbpA)	3.2.1.4	Eubacterium cellulosolvens 5	BAB86305.1	Q8RR29
endoglucanase / cellulose-binding protein B (CbpB)	3.2.1.4	Eubacterium cellulosolvens 5	BAE20171.1	Q402U6
endo-1,4-glucanase A (EndA)	3.2.1.4	Fibrobacter succinogenes AR1	AAA24894.1 AAA24895.1	P23665
endo-β-1,4-glucanase C (EgC;CMCase)	3.2.1.4	Fibrobacter succinogenes BL2	AAC41523.1	Q59442
endo-β-1,4-glucanase B (EndB;EgB;Fisuc_0057;FSU_0451) (Cel9G)	3.2.1.4	Fibrobacter succinogenes subsp. succinogenes S85	AAA68129.1 ACX73672.1 ADL25229.1	C9RJ28 Q59444
endo-1,4-glucanase D (CelD; Fisuc_1860; FSU_2362) (Cel9C)	3.2.1.4	Fibrobacter succinogenes subsp. succinogenes S85	AAC44386.1 ACX75452.1 ADL24960.1	P77864
endoglucanase 1 (CelE;End1;Fisuc_1859;FSU_2361) (Cel9B)	3.2.1.4	Fibrobacter succinogenes subsp. succinogenes S85	ABU45498.1 AAC44385.1 ACX75451.1 ADL26362.1	A7UG67 P71326
1,4-β-glucan glucohydrolase (Fisuc_2033;FSU_2558) (Cel9D)	3.2.1.74	Fibrobacter succinogenes subsp. succinogenes S85	ABY60376.1 ACX75620.1 ADL26040.1	C9RJA3
endo-β-1,4-glucanase (Cel9B)	3.2.1.4	Hungateiclostridium cellulolyticum CD2 ATCC 33288	CAI94607.1
endoglucanase (Clocl_2225)	3.2.1.4	Hungateiclostridium clariflavum DSM 19732	AEV68817.1
endo-β-1,4-glucanase I (CelI;Cthe_0040) (Cel9I)	3.2.1.4	Hungateiclostridium thermocellum ATCC 27405	ABN51281.1	Q02934
cellulase K (CelK;Cthe_0412) (Cel9K)	3.2.1.4	Hungateiclostridium thermocellum ATCC 27405	ABN51650.1	A3DCH1
cellobiohydrolase (CbhA;Cthe_0413) (Cbh9A)	3.2.1.91	Hungateiclostridium thermocellum ATCC 27405	ABN51651.1 AAR87745.1	A3DCH2 Q6RSN8	1RQ5[A] 1UT9[A]
endo-β-1,4-glucanase F (CelF;Cthe_0543) (Cel9B)	3.2.1.4	Hungateiclostridium thermocellum ATCC 27405	ABN51779.1	P26224
endo-β-1,4-glucanase R / cellotetraohydrolase (CelR;Cthe_0578) (Cel9R)	3.2.1.4	Hungateiclostridium thermocellum ATCC 27405	ABN51814.1	A3DCY5
broad substrate-specificity xyloglucanase J / processive endoglucanase (CelJ;Cthe_0624) (Cel9D/Cel9J+Cel44A)	3.2.1.151 3.2.1.151	Hungateiclostridium thermocellum ATCC 27405	ABN51859.1	A3DD30
endo-β-1,4-glucanase Q (CelQ;Cthe_0625) (Cel9I)	3.2.1.4	Hungateiclostridium thermocellum ATCC 27405	ABN51860.1	A3DD31
endo-β-1,4-glucanase (CelD;Cthe_0825) (Cel9A)	3.2.1.4	Hungateiclostridium thermocellum ATCC 27405	ABN52060.1	A3DDN1
endo-β-1,4-glucanase T (CelT;Cthe_2812) (Cel9T)	3.2.1.4	Hungateiclostridium thermocellum ATCC 27405	ABN54011.1	A3DJ82	2YIK[A]
endoglucanase T (CelT) (Cel9T)	3.2.1.4	Hungateiclostridium thermocellum F1	BAB79196.2	Q8VV73
endoglucanase J (CelJ) (Cel9D-Cel44A)	3.2.1.4	Hungateiclostridium thermocellum F1	BAA12070.1	P71140
endoglucanase Q (CelQ) (Cel9I)	3.2.1.4	Hungateiclostridium thermocellum F1	BAB33148.1	Q9AJF8	5GXX[A,B] 5GXY[A,B] 5GXZ[A,B] 5GY0[A,B] 5GY1[A,B]
cellobiohydrolase A (CbhA) (Cbh9A)	3.2.1.91	Hungateiclostridium thermocellum F7	CAA56918.2 CAA06693.1 CAA56918.1	Q59325
cellotetraose-producing endo-β-1,4-glucanase (CelR) (Cel9R)	3.2.1.4	Hungateiclostridium thermocellum F7	CAE51308.1	Q70DK3
endo-β-1,4-glucanase N (CelN) (Cel9N)	3.2.1.4	Hungateiclostridium thermocellum F7	CAB76935.1	Q9L3J5
cellobiohydrolase K (CelK) (Cel9K)	3.2.1.4 3.2.1.91	Hungateiclostridium thermocellum JW 20 / F7	AAC06139.1 CAA06692.1	O68438 O69308 P0C2S1
endo-β-1,4-glucanase D (CelD) (Cel9A)	3.2.1.4	Hungateiclostridium thermocellum NCIB 10682	CAA28255.1	P04954	1CLC[A] 4CJ0[A] 4CJ1[A]
endo-β-1,4-glucanase F (CelF) (Cel9B)	3.2.1.4	Hungateiclostridium thermocellum NCIB 10682	CAA43035.1	P26224
endo-β-1,4-glucanase I (CelI;CMC) (Cel9C=Cel9I)	3.2.1.4	Hungateiclostridium thermocellum NCIB10682 / F7	AAA20892.1 CAB76932.1	Q02934 Q9L3J8	2XFG[A]
endo-β-1,4-glucanase (cphy3367;CpCel9;Cphy_3367) (Cel9A)	3.2.1.4	Lachnoclostridium phytofermentans ISDg	ABX43720.1	A9KT90
endocellulase (EgltA) (Cel9)	3.2.1.4	Myxobacter sp. AL-1	AAF19168.1	Q9RAI8
endo-β-1,4-glucanase B (CelB) (Cel9B)	3.2.1.4	Paenibacillus barcinonensis BP-23	CAB38941.1	Q9Z4I1
xanthanase GH9 (Xan9)	3.2.1.-	Paenibacillus nanensis 62047	AXR85426.1		6FHJ[A]
endo-β-1,4-glucanase (Cel9P)	3.2.1.4	Paenibacillus sp. BME-14	ACJ68032.1	B7U9C9
exo-β-glucosaminidase (GlcNase;PpGlcNase;PBPRA0520)	3.2.1.165	Photobacterium profundum SS9	CAG18943.1		5DGQ[A,B] 5DGR[A,B]
endoglucanase (fragment) (Cel9A)	3.2.1.4	Pseudomonas sp. SK38	AAG49558.1	Q9APG3
endo-β-1,4-glucanase (CelA)	3.2.1.4	Pseudomonas sp. YD-15	AAD01959.1	Q9Z3X7
β-glucanase R (Ccel_1648) (Cel9R)	3.2.1.-	Ruminiclostridium cellulolyticum H10	ACL75999.1	B8I2K6
xyloglucanase X (Ccel_2621) (Cel9X)	3.2.1.151	Ruminiclostridium cellulolyticum H10	ACL76949.1	B8I6V7
cellulase W (Ccel_2226) (Cel9W)	3.2.1.4	Ruminiclostridium cellulolyticum H10	ACL76568.1	B8I4R4
cellulase U / cellulase S (Ccel_0755) (Cel9S=Cel9U)	3.2.1.-	Ruminiclostridium cellulolyticum H10	ACL75133.1	B8I7X6
β-glucanase T (Ccel_1249) (Cel9T)	3.2.1.-	Ruminiclostridium cellulolyticum H10	ACL75605.1	B8I0N0
cellulase E (CelE;Ccel_0732) (Cel9E)	3.2.1.-	Ruminiclostridium cellulolyticum H10	ACL75111.1 AAA73869.2	B8I7V4 Q46002
endo-β-1,4-glucanase G (CelG;Ccel_0731) (Cel9G)	3.2.1.4	Ruminiclostridium cellulolyticum H10	ACL75110.1 AAA73868.1	P37700	1G87[A,B] 1GA2[A,B] 1K72[A,B] 1KFG[A,B]
cellulase Q (Cel9Q;Ccel_0231) (Cel9Q)	3.2.1.4	Ruminiclostridium cellulolyticum H10	ACL74618.1 ABG76967.1	Q0PRN4
cellulase P (P90;Ccel_0753) (Cel9P)	3.2.1.4	Ruminiclostridium cellulolyticum H10	ACL75131.1 ABG76972.1	Q0PRM9
cellulase M (CelM;Ccel_0737) (Cel9M)	3.2.1.4	Ruminiclostridium cellulolyticum H10	ACL75116.1 AAG45160.1	B8I7V9 Q9EYQ2	1IA6[A] 1IA7[A]
cellulase J (CelJ;Ccel_0735) (Cel9J)	3.2.1.4	Ruminiclostridium cellulolyticum H10	ACL75114.1 AAG45158.1	B8I7V7 Q9EYQ4
cellulase H (CelH;Ccel_0734) (Cel9H)	3.2.1.4	Ruminiclostridium cellulolyticum H10	ACL75113.1 AAG45157.1	B8I7V6 Q9EYQ5
endo-β-1,4-glucanase (GH9A;RUM_01230) (Cel9A)	3.2.1.4	Ruminococcus champanellensis 18P13 = JCM 17042	CBL16391.1	D4L9U6
β-glucanase (GH9B;GH16A;RUM_05620) (Glc16A)	3.2.1.73	Ruminococcus champanellensis 18P13 = JCM 17042	CBL16782.1	D4LAY7
endo-β-1,4-glucanase (GH9C;RUM_08690) (Cel9C)	3.2.1.4	Ruminococcus champanellensis 18P13 = JCM 17042	CBL17047.1	D4LBQ2
endo-β-1,4-glucanase (GH9D;RUM_14490) (Cel9D)	3.2.1.4	Ruminococcus champanellensis 18P13 = JCM 17042	CBL17554.1	D4LD59
endo-β-1,4-glucanase (GH9E;RUM_15950) (Cel9E)	3.2.1.4	Ruminococcus champanellensis 18P13 = JCM 17042	CBL17683.1	D4LDI8
endo-β-1,4-glucanase (GH9F;RUM_15960) (Cel9F)	3.2.1.4	Ruminococcus champanellensis 18P13 = JCM 17042	CBL17684.1	D4LDI9
endo-β-1,4-glucanase (GH9G;RUM_24010) (Cel9G)	3.2.1.4	Ruminococcus champanellensis 18P13 = JCM 17042	CBL18389.1	D4LFJ4
STHERM_c20630	3.2.1.4	Spirochaeta thermophila DSM 6192	ADN02997.1	E0RQU1
STHERM_c20640	3.2.1.4	Spirochaeta thermophila DSM 6192	ADN02998.1	E0RQU2
endo-1,4-glucanase I (Cel1)	3.2.1.4	Streptomyces reticuli	CAA46570.1	Q05156
endo-β-1,3-1,4-glucanase (slr0897;Glc)	3.2.1.73	Synechocystis sp. PCC 6803	BAA10447.1 AGF52739.1 ALJ68659.1 BAF51695.1 BAK51232.1 NP_442377.1	A4PCG1 Q55365
endo-β-1,4-glucanase (E1;EGtf1;Tfu_1627) (Cel9B)	3.2.1.4	Thermobifida fusca YX	AAC06387.1 AAZ55662.1	Q08166
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] 1TF4[A,B] 3TF4[A,B] 4TF4[A,B]
endo-β-1,4-glucanase (ThCel9A) (Cel9A)	3.2.1.4	Thermobifida halotolerans YIM 90462	AEH04391.1
endo-β-1,4-glucanase Z / avicelase I (CelZ)	3.2.1.4	Thermoclostridium stercorarium	CAA39010.1	P23659
glycoside hydrolase family 9 endoglucanase (Cel9A)	3.2.1.151 3.2.1.4 3.2.1.6	uncultured bacterium	AXR85444.1
cellulase (029cel;Cel;CRATCEL) (possible fragment)	3.2.1.4	uncultured bacterium	CAD61242.1	Q6A3Q7
endoglucanase (UmCel9-y;GHF9s016)	3.2.1.-	uncultured bacterium	AEC04945.1 ALA62876.1
endo-β-1,4-glucanase (LScel4;LS4;Cel)	3.2.1.4	uncultured bacterium	CAF22221.1	Q5NJL8
cellulase (CelA2;BP-CelA2)	3.2.1.4	uncultured bacterium	AEW10553.1 AGT17861.1
endo-β-1,4-glucanase (UmCel9A) (Cel9A)	3.2.1.4	uncultured bacterium	ABB51609.1	Q308B9
endo-β-1,4-glucanase (UmCel9B) (Cel9B)	3.2.1.4	uncultured bacterium	ABB51610.1	Q308B8
endo-β-1,4-glucanase (UmCel9C) (Cel9C)	3.2.1.4	uncultured bacterium	ABB51611.1	Q308B7
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