Glycoside Hydrolase Family 9

Activities in Familyendoglucanase (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)
Mechanism Inverting
3D Structure Status( α / α ) 6
Catalytic Nucleophile/BaseAsp (experimental)
Catalytic Proton DonorGlu (experimental)
Noteformerly known as cellulase family E.
External resourcesCAZypedia; HOMSTRAD; PROSITE;
Statistics GenBank accession (3461); Uniprot accession (680); PDB accession (42); 3D entries (16); cryst (0)
All (2525) Archaea (4) Bacteria (1362) Eukaryota (947) unclassified (212) Structure (16) Characterized (170)
Bacteria
Protein Name EC#OrganismGenBankUniprot
PDB/3D Carbohydrate Ligands Resolution (Å)
 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
 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] 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
 endo-β-1,4-glucanase G (CelG;Ccel_0731) (Cel9G) 3.2.1.4 [Clostridium] 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 (CelM;Ccel_0737) (Cel9M) 3.2.1.4 [Clostridium] cellulolyticum H10 ACL75116.1
AAG45160.1
B8I7V9
Q9EYQ2
1IA6[A] 1.80
1IA7[A] β-D-Glcp-(1-4)-β-D-Glcp
2.00
 exo-β-glucosaminidase (GlcNase;PpGlcNase;PBPRA0520) 3.2.1.165 Photobacterium profundum SS9 CAG18943.1  
5DGQ[A,B] 1.90
5DGR[A,B] β-D-GlcpN
1.90
 cellobiohydrolase (CbhA;Cthe_0413) (Cbh9A) 3.2.1.91 Ruminiclostridium thermocellum ATCC 27405 ABN51651.1
AAR87745.1
A3DCH2
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 T (CelT;Cthe_2812) (Cel9T) 3.2.1.4 Ruminiclostridium thermocellum ATCC 27405 ABN54011.1 A3DJ82
2YIK[A] 2.10
 endoglucanase Q (CelQ) (Cel9I) 3.2.1.4 Ruminiclostridium thermocellum 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 Ruminiclostridium thermocellum NCIB 10682 CAA28255.1 P04954
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 Ruminiclostridium thermocellum NCIB10682 / F7 AAA20892.1
CAB76932.1
Q02934
Q9L3J8
2XFG[A] 1.68
 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  
3X17[A,B] 2.15
 VP2484   Vibrio parahaemolyticus RIMD 2210633 O3:K6 BAC60747.1
NP_798863.1
 
3H7L[A,B,C] 2.30
Eukaryota
Protein Name EC#OrganismGenBankUniprot
PDB/3D Carbohydrate Ligands Resolution (Å)
 endo-β-1,4-glucanase (Eg2;EF-EG2) 3.2.1.4 Eisenia fetida BAM14716.1  
3WC3[A] 1.50
 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  
4ZG8[A,B] 1.39
4ZH5[A,B] β-D-Glcp-(1-4)-β-D-Glcp
1.35
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