Activities in Sub Family	Chitosanase (EC 3.2.1.132); Endo-β-1,4-glucanase (EC 3.2.1.4); Lichenase / endo-β-1,3-1,4-glucanase (EC 3.2.1.73); Endo-β-1,4-xylanase (EC 3.2.1.8);
Mechanism	Retaining e
Clan	GH-A
3D Structure Status	( β / α ) 8 barrel
Catalytic Nucleophile/Base	Glu (experimental)
Catalytic Proton Donor	Glu (experimental)
Note	Once known as cellulase family A; many members have been assigned to subfamilies as described by Aspeborg et al. (2012) BMC Evol Biol. 12(1):186 (PMID: 22992189).
External resources	CAZypedia; HOMSTRAD; PROSITE;
Commercial Enzyme Provider(s)	MEGAZYME; NZYTech; PROZOMIX;
Statistics	GenBank accession (10); Uniprot accession (147); PDB accession (47); 3D entries (17); cryst (0)

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Bacteria
Protein Name	EC#	Reference	Organism	GenBank	Uniprot	PDB/3D	Subf
endo-β-1,4-glucanase	3.2.1.4	pubmed	Actinomyces sp. 40	AAC06196.1	O66064		2
endoglucanase (EglII)	3.2.1.4	doi	Bacillus amyloliquefaciens PSM 3.1	ADC54852.1	D3Y2F0		2
endoglucanase A (EngA)	3.2.1.4	pubmed	Bacillus amyloliquefaciens UMAS1002	AAL99668.1	Q8RPQ6		2
endo-β-1,4-glucanase (Egl01)	3.2.1.4	pubmed	Bacillus licheniformis	AIY72753.1	A0A0A7EZH7		2
endo-β-1,4-glucanase C (BglC;BLi02088;BL01471) (Cel5A)	3.2.1.4	doi	Bacillus licheniformis DSM 13 = ATCC 14580	AAU23613.2 AAU23613.1 AAU40977.1 ACR87895.1 CAF05574.1 CAV28462.1	A5A671 Q65IY7		2
endo-β-1,4-glucanase (Cel5A) (Cel5A)	3.2.1.4	doi	Bacillus licheniformis GXN151 / B-41361	AAP51020.1	Q7X3S6		2
endo-β-1,4-glucanase	3.2.1.4	pubmed	Bacillus sp. (in: firmicutes) 22-28	BAA12744.1	Q45554		2
endo-β-1,4-glucanase	3.2.1.4	doi	Bacillus sp. (in: firmicutes) 5H	BAA31712.1	O83012		2
endo-β-1,4-glucanase B1	3.2.1.4	pubmed	Bacillus sp. (in: firmicutes) N186-1	CAA83942.1	Q59232		2
CelS	3.2.1.4	doi	Bacillus sp. 79-23	AAC02536.1	O52731		2
endo-β-1,4-glucanase K (Egl-K)	3.2.1.4	pubmed	Bacillus sp. KSM-635	AAA22304.1	P19424	1G01[A] 1G0C[A]	2
endo-β-1,4-glucanase (Egl-64)	3.2.1.4	pubmed	Bacillus sp. KSM-64 / Bacillus sp. Z-16	CAJ00039.1 AAA73189.1 ACE14925.1 ACW22976.1 CAJ28077.1 CAT16610.1	Q59241		2
endoglucanase N252 (Egl252)	3.2.1.4	pubmed	Bacillus sp. KSM-N252	BAB62295.1	Q93R81		2
endo-β-1,4-glucanase (Egl-237)	3.2.1.4	pubmed	Bacillus sp. KSM-S237	CAJ00038.1 ABH71811.1 ACE14923.1 ACW22975.1 BAB19360.1 CAF02232.1 CAJ28076.1 CAT16607.1	Q9F216		2
bifunctional cellulase chitosanase (CelA)	3.2.1.4 3.2.1.132	URL URL	Bacillus sp. NBL420	AAK73277.1	Q93LI9		2
endo-β-1,4-glucanase	3.2.1.4	pubmed	Bacillus subtilis	AAA22307.1	Q45532		2
β-1,3-1,4-glucanase / cellulase C (CelA;CelC)	3.2.1.4	pubmed	Bacillus subtilis A8-8	AAO63626.1	Q6Y4Q1		2
endoglucanase (Egl173;Cel;EglS)	3.2.1.4	doi	Bacillus subtilis BEC-1 / Y106 / shu-3	AAK39540.1 ADM12805.1 ADP05286.1	Q93TJ6		2
endo-β-1,4-glucanase (Eg15) (Cel5A)	3.2.1.4	pubmed	Bacillus subtilis BME-15	ACI15227.1 ACJ12786.1 ACJ12787.1 ACJ12788.1 ACJ12789.1 ACJ12790.1 ACJ12791.1 ACJ12792.1	B6DVJ2 B6VEU9 B6VEV0 B6VEV1 B6VEV2 B6VEV3 B6VEV4 B6VEV5		2
endo-β-1,4-glucanase (EG5C)	3.2.1.4	pubmed	Bacillus subtilis BS-5	AVD69633.1 AVD69632.1			2
endo-β-1,4-glucanase (CMCase;BglC)	3.2.1.4	pubmed	Bacillus subtilis BSE616	BAA00859.1	P23549		2
endo-β-1,4-glucanase (CelG)	3.2.1.4	URL	Bacillus subtilis CHZ1	AAK94871.1	Q93LD0		2
endo-β-1,4-glucanase (EglS)	3.2.1.4	pubmed	Bacillus subtilis CK-2	CAA47429.1	G1DE47 P10475		2
endo-β-1,4-glucanase (BglC;Gld)	3.2.1.4	pubmed	Bacillus subtilis DLG	AAA22496.1	P07983		2
cellulase (CelDR)	3.2.1.4	pubmed	Bacillus subtilis DR	ABV45393.1 ACI63223.1	A8D0T0 B6V3I2		2
endo-β-1,4-glucanase (CelI15)	3.2.1.4	pubmed	Bacillus subtilis I15	ACK38261.1	B7UAM4		2
endo-β-1,4-glucanase	3.2.1.4	pubmed	Bacillus subtilis IARI-SP-1	AGW99977.1	U3RAX4		2
endo-β-1,4-glucanase (Egl499;Egl330)	3.2.1.4	doi	Bacillus subtilis JA18	AAZ22322.1	Q45T78		2
cellulase (Cel15;Cell15)	3.2.1.4	pubmed	Bacillus subtilis LN	ACR59602.1	C5I946		2
cellulase (EG)	3.2.1.4	doi	Bacillus subtilis NC1 / WRL101	BAL46915.1	H3K351		2
endo-β-1,4-glucanase (EglS;BglC;Gld;BSU18130;BsCel5;BsCel5A) (Cel5A)	3.2.1.4	pubmed	Bacillus subtilis subsp. subtilis str. 168	CAA82317.1 AEJ76923.1 AIY93123.1 AQR81804.1 AQR86018.1 CAA97610.1 CAB13696.2 NP_389695.1 NP_389695.2	A0A6M3ZBL5 G1DE47 P10475	3PZT[A,B] 3PZU[A,B] 3PZV[A,B,C,D]	2
endo-β-1,4-glucanase	3.2.1.4	doi	Bacillus subtilis subsp. subtilis UMC7	AGG11030.1	M1R5G7		2
cellulase (CelA10)	3.2.1.4	doi	bacterium enrichment culture clone CelA10	ACR23656.1	C5HG53		2
endo-1,4-glucanase A	3.2.1.4	pubmed	Butyrivibrio fibrisolvens A46	AAA20893.1	P22541		2
endo-β-1,4-glucanase (TTE0359) (Cel5A)	3.2.1.4	pubmed	Caldanaerobacter subterraneus subsp. tengcongensis MB4	AAM23649.1 NP_622045.1	Q8RCQ7		2
endo-β-1,4-glucanase D (CelD; Athe_0594) (Cel5D)	3.2.1.4	pubmed	Caldicellulosiruptor bescii DSM 6725	CAB01405.2 ACM59720.1 CAB01405.1 CAB01405.2	B9MPF9 Q59154		2
endo-β-1,4-glucanase (Calkro_2036)	3.2.1.4	pubmed	Caldicellulosiruptor kronotskyensis 2002	ADQ46879.1			2
endoglucanase (Csac_0678)	3.2.1.4	pubmed	Caldicellulosiruptor saccharolyticus DSM 8903	ABP66297.1	A4XHB2	5ECU[A]	2
endo-β-1,4-glucanase (CelB)	3.2.1.4	pubmed	Caldicellulosiruptor sp. F32	AFO70071.1	I7CBM8		2
endoglucanase (CelA)	3.2.1.4	pubmed	Cellulophaga sp. QY3	ADB80152.1	K9J9W6		2
endo-β-1,4-glucanase E / 5B (CelE;CJA_2983) (Cel5B)	3.2.1.4	pubmed	Cellvibrio japonicus Ueda107	ACE84076.1 CAA60493.1	B3PCS3 Q59665	8BQA[A] 8BQC[A]	2
endo-β-1,4-glucanase B (CelB) (Cel5A;Cel5B)	3.2.1.4	pubmed	Cellvibrio mixtus ATCC 12120	AAB61462.2	O07653		2
endo-β-1,4-glucanase 5A (EngF) (Cel5A)	3.2.1.4	pubmed	Clostridium cellulovorans	AAB40891.1	P94622		2
endoglucanase 5A (ChCel5A; CHU_1107) (Cel5A)	3.2.1.4	pubmed	Cytophaga hutchinsonii ATCC 33406	ABG58383.1	A0A6N4SQ01 Q11W33		2
periplasmic endoglucanase 5B (CHU_2103) (Cel5B)	3.2.1.4	pubmed	Cytophaga hutchinsonii ATCC 33406	ABG59366.1	A0A6N4ST27 Q11T98	5IHS[A]	2
endo-β-1,4-glucanase (Cel5Z)	3.2.1.4	pubmed	Dickeya chrysanthemi PY35	AAF18152.1	Q9REW0		2
endo-β-1,4-glucanase Z (CelZ;EgZ;Dda3937_02793) (Cel5A=Cel5Z)	3.2.1.4	pubmed	Dickeya dadantii 3937	ADM99099.1 CAA68604.1	P07103	1EGZ[A,B,C]	2
endo-β-1,4-glucanase A (CelA;EgA;Bcell_0438)	3.2.1.4	pubmed	Evansella cellulosilytica DSM 2522	ADU28720.1 AAA22301.1	D2LVP1 E6TWN7 P06566		2
endo-β-1,4-glucanase B (CelB;EgB;Bcell_0437)	3.2.1.4	pubmed	Evansella cellulosilytica DSM 2522	ADU28719.1 AAA22299.1	D2LVP0 E6TWN6 P06565		2
endo-β-1,4-glucanase C (CelC;EgC;Cel2;Bcell_3370)	3.2.1.4	pubmed	Evansella cellulosilytica DSM 2522	ADU31612.1 AAA22306.1	D2LQZ9 E6U1W5 P19570		2
endoglucanase (partial)	3.2.1.4	pubmed	Fibrobacter succinogenes subsp. succinogenes S85	AAC06197.1	O66065		2
cellulase (Fisuc_2364;FSU_2914) (Cel5H)	3.2.1.4	pubmed	Fibrobacter succinogenes subsp. succinogenes S85	ABU45500.1 ACX75950.1 ADL27061.1	A7UG69		2
endo-β-1,4-glucanase (CelA;GsCelA)	3.2.1.4	pubmed	Geobacillus sp. 70PC53	ACJ60856.1	C5H6X3	4XZB[A] 4XZW[A]	2
endoglucanase (Cel5;HCH_03914)	3.2.1.4	pubmed	Hahella chejuensis KCTC 2396	ABC30636.1	Q2SFD8		2
endo-β-1,4-glucanase (Egl-1139) / III-3A (Cel5A)	3.2.1.4	pubmed	Halalkalibacter akibai / KSM-1139	BAA00045.1 AAA22305.1 ACE14924.1	P06564		2
endoglucanase (EG-I-1)	3.2.1.4	pubmed	Halalkalibacter akibai I-1	AFI25187.1	I1V1X7		2
endo-β-1,4-glucanase (MaCel5A) (Cel5A)	3.2.1.4	pubmed	Microbulbifer sp. ALW1	QSR83793.1	A0A8A1G1R1		2
cellulase 5A (Cel5A)	3.2.1.4	pubmed	Paenibacillus polymyxa GS01	ABV08875.1	A9Q741		2
endo-β-1,4-glucanase N (CelN) (fragment)	3.2.1.4	pubmed	Pectobacterium carotovorum ATROSEPTICA	AAC37033.1	Q59394		2
endo-β-1,4-glucanase V1	3.2.1.4	pubmed	Pectobacterium carotovorum SCC3193	CAA55823.1	Q59395		2
endo-β-1,4-glucanase V	3.2.1.4	pubmed	Pectobacterium carotovorum SCRI193	CAA53592.1	Q47096		2
endo-β-1,4-glucanase (CelA)	3.2.1.4	pubmed	Pectobacterium carotovorum subsp. carotovorum LY34	AAC02964.2 AAC02964.1	O31029		2
glucanase (BglC)	3.2.1.4	pubmed	Priestia megaterium L103	AGG91154.1	V5JAY7		2
endoglucanase (CelG) (Cel5G)	3.2.1.4	pubmed	Pseudoalteromonas haloplanktis A23	CAA76775.1	O86099	1TVN[A,B] 1TVP[A,B]	2
endoglucanase (CelA)	3.2.1.4	pubmed	Pseudoalteromonas sp. MB-1	AAS58467.1	Q6QA02		2
cellulase (CelY)	3.2.1.4	pubmed	Pseudoalteromonas sp. NO3	ACN62172.1	C0KZC4		2
cellulase (AclA)	3.2.1.4	doi	Pseudomonas sp. ND137	BAB79288.1	Q8VUT3		2
endo-β-1,4-glucanase (CelX)	3.2.1.4	pubmed	psychrophilic marine bacterium DY3	AAP04424.1	Q841J5		2
β-1,4-glucanase 5I (Cel5I; Ccel_0428) (Cel5I)	3.2.1.4	pubmed	Ruminiclostridium cellulolyticum H10	ACL74811.1 AAL79562.1	B8I5Z4 Q8RLT7		2
endo-β-1,4-glucanase 5A (CelA) (Cel5A)	3.2.1.4	pubmed	Ruminiclostridium josui	BAA12826.1 BAA12826.2	Q59290		2
endo-1,4-glucanase 4 (EGIV)	3.2.1.4	doi	Ruminococcus albus	BAA32286.1	Q07940		2
endo-β-1,4-glucanase 5J (Sde_2494) (processive) (Cel5J)	3.2.1.4	pubmed	Saccharophagus degradans 2-40	ABD81754.1	Q21HS5		2
endoglucanase 5A (Sde_3003) (Cel5A)	3.2.1.4	pubmed	Saccharophagus degradans 2-40	ABD82260.1	Q21GB9		2
endo-β-1,4-glucanase 5H (Sde_3237) (processive) (Cel5H)	3.2.1.4	pubmed	Saccharophagus degradans 2-40	ABD82494.1	Q21FN5		2
endo-β-1,4-glucanase 5G (Sde_3239) (processive) (Cel5G)	3.2.1.4	pubmed	Saccharophagus degradans 2-40	ABD82496.1	Q21FN3		2
cellulase (CelMytB)	3.2.1.4	pubmed	Saccharophagus sp. Myt-1	BAM21527.1	I4DUD7		2
endo-β-1,4-glucanase 5A (Cel5A)	3.2.1.4	pubmed	Salipaludibacillus agaradhaerens	AAC19169.1	O85465	1A3H[A] 1E5J[A] 1H11[A] 1H2J[A] 1H5V[A] 1HF5[A] 1HF6[A] 1HF7[A] 1OCQ[A] 1QHZ[A] 1QI0[A] 1QI2[A] 1W3K[A] 1W3L[A] 2A3H[A] 2V38[A] 3A3H[A] 4A3H[A] 5A3H[A] 6A3H[A] 7A3H[A] 8A3H[A]	2
chitosanase (OUC-Csngly)	3.2.1.4 3.2.1.132	pubmed pubmed	Streptomyces bacillaris ATCC 15855	ULR56997.1			2
chitosanase II (ChoII)	3.2.1.132	pubmed	Streptomyces griseus HUT 6037	BAC65342.1	Q83VL5		2
endo-β-1,4-glucanase A (CelA)	3.2.1.4	pubmed	Streptomyces lividans 1326		P27035		2
endo-β-1,4-glucosidase (TwCel5-6)	3.2.1.73	pubmed	Teredinibacter sp. 82 / Teredinibacter waterburyi	WAK85940.1		8C10[A]	2
bifunctional β-1,4-endoglucanase / cellobiohydrolase (CelAB)	3.2.1.4	pubmed	Teredinibacter turnerae T7901	ABS72374.1	A9Q634		2
endo-β-1,4-glucanase / celulase (CelDZ1a)	3.2.1.4	pubmed	Thermoanaerobacterium sp. A57Txylan	ALX38276.1	A0A0U4EBH5 I3VS73	5FIP[A,B,C,D]	2
endo-β-1,4-glucanase 5A (E5;CelE;TfCel5A;Tfu_0901) (Cel5A)	3.2.1.4	doi	Thermobifida fusca YX	AAZ54939.1 AAC09379.1	Q01786 Q47RH8	2CKR[A,B] 2CKS[A,B]	2
cellulase / endo-β-1,4-glucanase (ThCel5) (Cel5A)	3.2.1.4	pubmed	Thermobifida halotolerans YIM 90462	AFK65733.1			2
cellulase 5R (Cel5R;Cel5R_FS)	3.2.1.4	pubmed	uncultured bacterium	AND74761.1	A0A172PZJ4	5I2U[A,B]	2
cellulase (CelA3;BP-CelA3) (fragment)	3.2.1.4	pubmed	uncultured bacterium	AEW10554.1	H2BNN7		2
β-glucanase (UmCel5G;RC1)	3.2.1.4	pubmed	uncultured bacterium	ABA42184.1	Q3HXC4		2
β-glucanase (UmCel5H;RC2)	3.2.1.4	pubmed	uncultured bacterium	ABA42185.1	Q3HXC3		2
endo-β-1,4-glucanase (CRS200) (Cel5B)	3.2.1.4	URL	uncultured bacterium	AFJ44728.1	I2B2S2		2
endo-β-1,4-glucanase (CelWS3)	3.2.1.4	pubmed	uncultured bacterium	AFX88673.1	M4I2I3		2
endo-β-1,4-glucanase (CelWS14)	3.2.1.4	pubmed	uncultured bacterium	AFX88668.1	M4I2I2		2
endo-β-1,4-glucanase (CelWS6)	3.2.1.4	pubmed	uncultured bacterium	AFX88666.1	M4I2R3		2
endo-β-1,4-glucanase (CelWS36)	3.2.1.4	pubmed	uncultured bacterium	AFX88672.1	M4I2J6		2
endo-β-1,4-glucanase (CelWS7)	3.2.1.4	pubmed	uncultured bacterium	AFX88667.1	M4I2J5		2
cellulase (CS10;CelCS10)	3.2.1.4	pubmed	uncultured bacterium	AGL50932.1	R4P2Q6		2
endo-β-1,4-glucanase (RC3)	3.2.1.4	pubmed	uncultured bacterium	ABI94085.1	Q06B38		2
endo-β-1,4-glucanase (RC5)	3.2.1.4	pubmed	uncultured bacterium	ABI94086.1	Q06B37		2
cellulase (CelE1)	3.2.1.4	pubmed	uncultured bacterium	AHA42547.2 AHA42547.1	A0A0R5P8X1 V5KYY9	4M1R[A,B]	2
cellulase (C1A1)	3.2.1.4	pubmed	uncultured bacterium	BAO65790.1			2
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