Glycoside Hydrolase Family 8

Activities in FamilyChitosanase (EC 3.2.1.132);
[inverting] oligosaccharide reducing-end xylanase (EC 3.2.1.156);
Endo-β-1,3-xylanase (EC 3.2.1.32);
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);
Endo-β-1,4-xylanase (EC 3.2.1.8);
Mechanism Inverting e
ClanGH-M
3D Structure Status( α / α ) 6 barrel
Catalytic Nucleophile/BaseAsp (inferred)
Catalytic Proton DonorGlu (experimental)
Noteformerly known as cellulase family D
External resourcesCAZypedia; PRINTS; PROSITE;
Commercial Enzyme Provider(s)NZYTech; PROZOMIX;
Statistics GenBank accession (10323); Uniprot accession (83); PDB accession (49); 3D entries (18); cryst (1)
Bacteria
Protein Name EC#OrganismGenBankUniprot
PDB/3D Carbohydrate Ligands Resolution (Å)
 endo-β-1,4-glucanase A (CelA) (Cel8A) 3.2.1.4 Acetivibrio thermocellus NCIB 10682 / JW20 AAA83521.1 A3DC29
P04955
1CEM[A] 1.65
1IS9[A] 1.03
1KWF[A] β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp
0.94
 endo-β-1,4-glucanase (VFA0882)   Aliivibrio fischeri ES114 AAW87952.1  
5CD2[A] 1.55
 chitosanase (ChoK) 3.2.1.132 Bacillus cereus BAG1O-3 K17-2   Q9ALZ1
S3JG56
1V5C[A] 2.00
1V5D[A,B] 1.50
7CJU[A,B] 1.74
7XGQ[A,B] 1.50
 endo-β-1,4-glucanase (BcsZ) 3.2.1.4 Enterobacter sp. CJF-002 BAM44856.1 K0IUV6
7F81[A,B,C,D] 1.93
7F82[A,B,C,D] β-D-Glcp-(1-4)-β-D-Glcp
β-D-Glcp-(1-4)-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
1.30
 endo-β-1,4-glucanase (YhjM;BcsC;b3531) (periplasmic) 3.2.1.4 Escherichia coli str. K-12 substr. MG1655 AAC76556.1
AAB18508.1
AIZ89469.1
ALI38788.1
AMC96411.1
AUG18236.1
AVI53692.1
AYG17530.1
NP_417988.1
P37651
3QXF[A,B,C,D] 1.85
3QXQ[A,B,C,D] β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp-(1-4)-β-D-Glcp
2.20
 reducing-end-xylose releasing exo-oligoxylanase (Rex; Rex8A; BhRex8A; BH2105) 3.2.1.156 Halalkalibacterium halodurans C-125 BAB05824.1
NP_242971.1
Q9KB30
1WU4[A] 1.35
1WU5[A] β-D-Xylp
2.20
1WU6[A] β-D-Xylp-(1-4)-β-D-Xylp
1.45
2DRO[A] 1.70
2DRQ[A] 2.10
2DRR[A] 1.60
2DRS[A] 2.10
3A3V[A] 1.39
 endo-β-1,4-glucanase (Cel10;Kvar_0212) 3.2.1.4 Klebsiella variicola At-22 ADC56143.1 A0A0J4VP90
D3RD09
5GY3[A] 1.77
 endo-β-1,4-glucanase (CMCax;CMCase;Orf1) 3.2.1.4 Komagataeibacter sucrofermentans BPR2001 BAA31461.1
AAQ38000.1
O82857
6VC5[A] 1.50
 endo-β-1,4-glucanase (CMCax;AEG) 3.2.1.4 Novacetimonas hansenii ATCC 23769 AAA16969.1 P37696
1WZZ[A] 1.65
 reducing-end xylose-releasing exo-oligoxylanase (Rex8A) 3.2.1.156 Paenibacillus barcinonensis BP-23 ALP73600.1 A0A0S2UQQ5
6SHY[A,B] 1.81
6SRD[A,B] β-D-Xylp
1.93
6SUD[A,B] β-D-Xylp
1.74
6TO0[A,B] α-L-Araf-(1-2)-β-D-Xylp-(1-4)-β-D-Xylp-(1-4)-β-D-Xylp
1.88
6TOW[A,B] β-D-Xylp-(1-4)-β-D-Xylp-(1-4)-β-D-Xylp-(1-4)-β-D-Xylp
2.05
6TPP[A,B] 2.64
6TRH[A,B,C,D] β-D-Xylp-(1-4)[α-L-Araf-(1-3)]-β-D-Xylp-(1-4)-β-D-Xylp-(1-4)-β-D-Xylp
1.86
 reducing-end-xylose releasing exo-oligoxylanase (PbRex8) 3.2.1.156 Paenibacillus barengoltzii CAU904 AUB45109.1
WP_016314299.1
 
5YXT[A,B,C,D] 1.88
 β-1,3-1,4-glucanase / chitosanase (BGlc8H;Lic8H) 3.2.1.73
3.2.1.132
Paenibacillus sp. X4 AGV55649.1 A0A088BCU2
5X3A[A,B] 1.79
5XD0[A,B] 1.79
 endo-β-1,4-xylanase (Xyl;XPH) 3.2.1.8 Pseudoalteromonas haloplanktis TAH3A CAD20872.1
CAJ30796.1
CAJ33706.1
Q8RJN8
1H12[A] β-D-Xylp
1.2
1H13[A] 1.3
1H14[A] 1.5
1XW2[A] 1.76
1XWQ[A] β-D-Xylp-(1-4)-β-D-Xylp-(1-4)-α-D-Xylp
1.88
1XWT[A] 1.30
2A8Z[A] 3.20
2B4F[A] β-D-Xylp-(1-4)-β-D-Xylp-(1-4)-β-D-Xylp-(1-4)-β-D-Xylp-(1-4)-β-D-Xylp
1.95
 endo-β-1,4-glucanase (BcsZ;PP2637)   Pseudomonas putida KT2440 AAN68245.1
NP_744781.1
 
4Q2B[A,B,C,D,E,F] 2.12
 endoglucanase (TE10_01090;AfmE1) 3.2.1.73 Raoultella ornithinolytica S12 AJF70739.1  
5CZL[A] 2.39
 endo-β-1,4-glucanase C (CelC;Ccel_0730) (Cel8C) 3.2.1.4 Ruminiclostridium cellulolyticum H10 ACL75109.1
AAA73867.1
P37699
1G4L[nd]
1G4N[nd]
 xylanase active on β-1,4-xylan and mixed-linkage β-1,3-β-1,4-xylan (TtGH8; TERTU_4506) 3.2.1.8
3.2.1.32
Teredinibacter turnerae T7901 ACR14722.1
ACP87281.1
ACW01909.1
C5BJ89
6G00[A] 1.40
6G09[A] β-D-Xylp-(1-4)-β-D-Xylp
1.40
6G0B[A] β-D-Xylp-(1-4)-β-D-Xylp-(1-4)-β-D-Xylp
1.80
6G0N[A] β-D-Xylp-(1-4)-β-D-Xylp-(1-4)-β-D-Xylp-(1-4)-β-D-Xylp-(1-4)-β-D-Xylp
1.80
 xylanase (Xyn8) (Xyn8) 3.2.1.8 uncultured bacterium ABB71891.1 Q0H3C1
cryst    
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