Glycoside Hydrolase Family 18

Known Activitieschitinase (EC 3.2.1.14); endo-β-N-acetylglucosaminidase (EC 3.2.1.96); xylanase inhibitor; concanavalin B; narbonin
Mechanism Retaining
ClanGH-K
3D Structure Status( β / α ) 8
Catalytic Nucleophile/Basecarbonyl oxygen of C-2 acetamido group of substrate
Catalytic Proton DonorGlu (experimental)
NoteContains chitinases of classes III and V. Contains non-catalytic proteins such as xylanase inhibitor; concanavalin B; narbonin
External resourcesCAZypedia; HOMSTRAD; InterPro; PFAM; PROSITE;
Commercial Enzyme Provider(s)NZYTech; PROZOMIX;
Statistics GenBank accession (5310); Uniprot accession (3162); PDB accession (216); 3D entries (48); cryst (3)
All (4286) Archaea (25) Bacteria (2512) Eukaryota (1630) Viruses (74) unclassified (45) Structure (48 - 3 cryst) Characterized (391)
Archaea
Protein Name EC#OrganismGenBankUniprotPDB/3D
 chitinase (PF1234+PF1233;ChiA+ChiB) (Chi18B+Chi18A) 3.2.1.14 Pyrococcus furiosus DSM 3638 AAL81357.1
NP_578962.1
Q8U1H5 2DSK[A,B]
3A4W[A,B]
3A4X[A,B]
Bacteria
Protein Name EC#OrganismGenBankUniprotPDB/3D
 chitinase (ChitiB) 3.2.1.14 Arthrobacter sp. TAD20 CAB62499.1 Q9REI6 1KFW[A]
 chitinase (ChiNCTU2) 3.2.1.14 Bacillus cereus NCTU2 / 42 ACY39278.1 D0VV09 cryst
 chitinase A1 (ChiA;ChiA1) 3.2.1.14 Bacillus circulans WL-12 AAA81528.1 P20533.1 1ITX[A]
 BSU05710 (YdhD)   Bacillus subtilis subsp. subtilis str. 168 CAB12390.1
CAB12390.2
NP_388452.1
  3CZ8[A,B]
 chitinase (BT2825)   Bacteroides thetaiotaomicron VPI-5482 AAO77931.1
NP_811737.1
  3CO4[A]
3FND[A]
 endo-β-N-acetylglucosaminidase (BT3987;BT_3987) 3.2.1.96 Bacteroides thetaiotaomicron VPI-5482 AAO79092.1
NP_812898.1
  3POH[A]
 endo-N-acetylglucosaminidase F1 (EndoF1) 3.2.1.96 Elizabethkingia meningoseptica ATCC 33958 AAA24922.1 P36911.1 2EBN[A]
 endo-N-acetylglucosaminidase F3 (EndoF3) 3.2.1.96 Elizabethkingia meningoseptica ATCC 33958 AAA24924.1 P36913.1 1EOK[A]
1EOM[A]
 chitinase II (KPN_01201)   Klebsiella pneumoniae subsp. pneumoniae MGH 78578 ATCC 700721 ABR76634.1 A6T7R3 3QOK[A]
 chitinase (ChiA;L9964) (Chi18A) 3.2.1.14 Lactococcus lactis subsp. lactis Il1403 AAK06048.1
NP_268107.1
Q9CE95 3IAN[A]
 chitinase F1 (ChiF1)   Nocardiopsis sp. F96 BAC98349.1 Q76GR3 cryst
 chitinase A (ChiA) 3.2.1.14 Serratia marcescens 2170 / 27117 / BJL200 / ATCC990 / QMB1466 AAA26551.1
AAR10884.1
BAA31567.1
CAA27292.1
CAA85291.1
O83008
P07254.3
1CTN[A]
1EDQ[A]
1EHN[A]
1EIB[A]
1FFQ[A]
1FFR[A]
1K9T[A]
1NH6[A]
1RD6[A]
1X6L[A]
1X6N[A]
2WK2[A]
2WLY[A]
2WLZ[A]
2WM0[A]
 chitinase B (ChiB) 3.2.1.14 Serratia marcescens BJL200 CAA85292.1 Q54276 1E15[A,B]
1E6N[A,B]
1E6P[A,B]
1E6R[A,B]
1E6Z[A,B]
1GOI[A,B]
1GPF[A,B]
1O6I[A,B]
1OGB[A,B]
1OGG[A,B]
1UR8[A,B]
1UR9[A,B]
1W1P[A,B]
1W1T[A,B]
1W1V[A,B]
1W1Y[A,B]
 chitinase B (ChiB) 3.2.1.14 Serratia marcescens QMB1466 AAL57855.1
BAA31568.1
CAA33278.1
P11797.1
Q547S1
1H0G[A,B]
1H0I[A,B]
 chitinase A (ChiA;Chi18bA;SCK15.05c;SCO5003) (Chi18A) 3.2.1.14 Streptomyces coelicolor A3(2) BAA75642.1
CAB92596.1
NP_629155.1
Q9KY99
Q9Z9M9
3EBV[A]
 endo-β-N-acetylglucosaminidase H (EndoH;Endo-H) 3.2.1.96 Streptomyces plicatus AAA26738.1
AAX00996.1
AAY74563.1
ABA35708.1
P04067.1 1C3F[A]
1C8X[A]
1C8Y[A]
1C90[A,B]
1C91[A]
1C92[A]
1C93[A]
1EDT[A]
 chitinase A (ChiA;VhChiA) 3.2.1.14 Vibrio harveyi AAK11576.1 Q9AMP1 3ARO[A]
3ARP[A]
3ARQ[A]
3ARR[A]
3ARS[A]
3ART[A]
3ARU[A]
3ARV[A]
3ARW[A]
3ARX[A]
3ARY[A]
3ARZ[A]
3AS0[A]
3AS1[A]
3AS2[A]
3AS3[A]
3B8S[A,B]
3B9A[A]
3B9D[A]
3B9E[A]
 chitinase (Chi1) (Yen-Tc subunit) 3.2.1.14 Yersinia sp. MH-1 / Yersinia entomophaga MH96 ABG33870.1 B6A876 3OA5[A,B]
4A5Q[A,B,C,D,E]
Eukaryota
Protein Name EC#OrganismGenBankUniprotPDB/3D
 chitinase (ChiC;AtChiC;At4g19810) 3.2.1.14 Arabidopsis thaliana ABL66795.1
AEE84228.1
BAE99745.1
CAA19698.1
CAB78983.1
NP_193716.1
O81862 3AQU[A,B,C,D]
 chitinase B1 (ChiB1) 3.2.1.14 Aspergillus fumigatus ATCC 13073 AAO61686.1 Q873X9 1W9P[A,B]
1W9U[A,B]
1W9V[A,B]
2A3A[A,B]
2A3B[A,B]
2A3C[A,B]
2A3E[A,B]
2IUZ[A,B]
3CH9[A,B]
3CHC[A,B]
3CHD[A,B]
3CHE[A,B]
3CHF[A,B]
 chitinase A1 (ChiA1)   Aspergillus fumigatus ATCC 13073 AAO61685.1 Q873Y0 2XTK[A,B]
2XUC[A,B,C]
2XVN[A,B,C]
2XVP[A,B]
 chitinase (ChiB) 3.2.1.14 Aspergillus fumigatus YJ-407 AAP23218.1 Q870C0 1WNO[A,B]
 chitinase (CrChi1) 3.2.1.14 Bionectria ochroleuca CGMCC 0806 ABV57861.1 A9LI60 3G6L[A]
3G6M[A]
 signal processing protein (Chi3L1;Spc-40)   Bos taurus AAP41220.1
AAP41220.2
P30922.3 1OWQ[A]
2ESC[A]
 mammary gland protein 40 (SPB-40)   Bubalus bubalis AAP42568.2 Q7YS85 1SV8[A]
1TFV[A]
2O9O[A]
2QF8[A]
 concanavalin B   Canavalia ensiformis CAA58450.1 P49347 1CNV[A]
 signalling protein (SPG-40;MGP-40;BP40;CHI3L1)   Capra hircus AAL87007.1 Q8SPQ0 1LJY[A]
1QZO[A]
1SYT[A]
1ZBV[A]
1ZBW[A]
1ZU6[A]
1ZU7[A]
1ZU8[A]
1ZU9[A]
2A09[A]
2A0O[A]
2AOS[A]
2B2Z[A]
2B31[A]
2B40[A]
2B41[A]
2DSZ[A]
2DT0[A]
2DT1[A]
2DT2[A]
2DT3[A]
2O92[A]
2OLH[A]
 complement fixation-chitinase 3.2.1.14 Coccidioides posadasii SILVEIRA AAB48566.1
AAB48567.1
P0CB51
P54196
1D2K[A]
1LL4[A]
1LL6[A]
1LL7[A]
 chitinase (CVC) (fragment)   Crocus vernus     3SIM[A,B]
 imaginal disk growth factor 2 (Idgf2;CG4475)   Drosophila melanogaster AAC99418.1
AAF45017.1
AAF53536.1
AAL28234.1
ADD74348.1
ADF50363.1
NP_477257.2
Q9V3D4
Q9V3D4.1
1JND[A]
1JNE[A]
 bifunctional chitinase / lysozyme (hevamine A) 3.2.1.14
3.2.1.17
Hevea brasiliensis AAB19633.1
ABI32402.1
ABI32402.2
ADR82196.1
CAA07608.1
CAA09110.1
P23472.2 1HVQ[A]
1KQY[A]
1KQZ[A]
1KR0[A]
1KR1[A]
1LLO[A]
2HVM[A]
 stabilin-1 interacting chitinase-like protein (SI-CLP;MIRF;ChiD1;Gl008)   Homo sapiens AAH13642.1
AAH95409.1
AAK14915.1
AAK67632.1
BAB55316.1
BAC11603.1
BAG54072.1
BAG60093.1
BAH13441.1
CAF32458.1
CAV31088.1
EAX02415.1
Q9BWS9 3BXW[A,B]
 chitinase / chitotriosidase (Chit1;HCHT) 3.2.1.14 Homo sapiens AAC50246.1
AAE83140.1
AAE83141.1
AAG10644.1
AAH69614.1
AAI03696.1
AAI05681.1
AAI05682.1
AAI05683.1
AAY73903.1
AAY73904.1
ABE14345.1
BAG51478.1
CAC37767.1
CAC37768.1
NP_003456.1
Q13231.1 1GUV[A]
1HKI[A]
1HKJ[A]
1HKK[A]
1HKM[A]
1LG1[A]
1LG2[A]
1LQ0[A]
1WAW[A]
1WB0[A]
 chitin-binding lectin / chitinase 3-like-1 (Chi3L1;gp-39;HC-gp39;HumGP39;YKL-40)   Homo sapiens AAA16074.1
AAH08568.1
AAH38354.1
AAH39132.1
AAP35887.1
ABA82376.1
ACM80555.1
ACM82449.1
BAG35757.1
CAA69661.1
CAB76472.1
NP_001267.1
B2R7B0
P36222.2
1HJV[A,B,C,D]
1HJW[A,B]
1HJX[A,B,C,D]
1LA7[A]
1NWR[A,B,C,D]
1NWS[A,B,C,D]
1NWT[A,B,C,D]
1NWU[A,B,C,D]
 acidic chitinase / acidic mammalian chitinase (ChiA;AMCase)) 3.2.1.14 Homo sapiens AAG60019.1
AAH36339.1
AAH36339.2
AAH47336.1
AAH47336.2
AAI06911.1
AAI39902.1
AAI39921.1
AAX02309.1
AAX02311.1
AAX54833.1
AAX81431.1
AAX81432.1
AAX81433.1
AAX81434.1
AAY07520.1
AAY07521.1
BAA86980.1
BAA86981.1
BAF83391.1
CAD35096.1
CAH70802.1
CAH70803.1
CAH70804.1
CAI19263.1
CAI19265.1
CAI19266.1
NP_068569.1
Q9BZP6.1 2YBT[A,B,C,D,E,F]
2YBU[A,B,C,D,E,F]
3FXY[A,B,C,D]
3FY1[A,B]
3RM4[A,B]
3RM8[A,B]
3RM9[A,B]
3RME[A,B]
 chitin-binding protein (Brp39)   Mus musculus AAH03780.1
AAH04734.1
AAH05611.1
ABY53363.1
BAC34654.1
BAE33251.1
CAA63603.1
CAJ18491.1
NP_031721.1
Q4FJW9
Q61362
Q61362.2
cryst
 ECF-L (CHI3L3;Ym1)   Mus musculus AAB01230.1
AAB62394.2
AAH61154.1
AAX02313.1
BAA13458.2
BAE23385.1
BAE32572.1
NP_034022.1
O35744
O35744.2
Q3U462
1E9L[A]
1VF8[A]
 chitinase (ChiV;Chi-V;ChiC1) 3.2.1.14 Nicotiana tabacum CAA54374.1
CAB58462.1
Q43576 3ALF[A]
3ALG[A]
 signal processing protein (SPS-40;Chi3L1)   Ovis aries AAQ94054.1 Q6TMG6 1R2V[A]
1SR0[A]
1ZBK[A]
1ZL1[A]
2AO8[A]
2AOK[A]
2B2L[A]
2B2P[A]
2DPE[A]
2DSU[A]
2DSV[A]
2DSW[A]
2FDM[A]
2G41[A]
2G8Z[A]
2PI6[A]
 endochitinase (Ppl2) 3.2.1.14 Parkia platycephala CAO78600.1 A6ZJJ1 2GSJ[A]
 chitinase (Cts1;YLR286C) 3.2.1.14 Saccharomyces cerevisiae S288c AAB67331.1
AAT93059.1
ABC16985.1
NP_013388.1
P29029.2 2UY2[A]
2UY3[A]
2UY4[A]
2UY5[A]
 xylanase-A-amylase inhibitor (XAIP-III)   Scadoxus multiflorus ADO23650.1   3O9N[A]
 haementhin (XAIP)   Scadoxus multiflorus ACD36579.1 B2ZGS7 3D5H[A]
3HU7[A]
3M7S[A]
3OIH[A]
 xylanase and α-amylase inhibitor isoform II (fragment)   Scadoxus multiflorus AIIMSBP-002 ADJ78351.1 D9MWI4 3MU7[A]
 signal processing protein (Spp-40)   Sus scrofa AAV30548.1 Q29411 1XHG[A]
1XRV[A]
1ZB5[A]
1ZBC[A]
 xylanase inhibitor protein I (XipI;XIP-I)   Triticum aestivum ADB81849.1
CAD19479.1
Q8L5C6 1OM0[A]
1TA3[A]
1TE1[A]
 narbonin   Vicia narbonensis CAA80979.1
CAA80980.1
CAA80983.1
Q08884
Q41675
1NAR[A]




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