Mechanism	Inverting e
3D Structure Status	lysozyme fold
Catalytic Nucleophile/Base	Not known
Catalytic Proton Donor	Not known
Note	Contains chitinases of classes I, II, and IV. Subfamiles established in (Hornung and Terrapon, 2024) [PMID:37585436]
External resources	CAZypedia; PROSITE;
Statistics	GenBank accession (115); Uniprot accession (127); PDB accession (37); 3D entries (20); cryst (0)

Bacteria
Protein Name	EC#	Organism	GenBank	Uniprot	PDB/3D Carbohydrate Ligands Resolution (Å)	Subf
chitinase G (ChiG;SCO0482;SCF80.03;SCF34.01) (Chi19G)	3.2.1.14	Streptomyces coelicolor A3(2)	CAD55444.1 BAA75648.1 CAB57191.1 NP_733504.1	Q8CK55 Q9Z9M4	2CJL[A,B] 1.5	2
chitinase C (ChiC)	3.2.1.14	Streptomyces griseus HUT 6037	BAA23739.1	O50152	1WVU[A,B] 2.45 1WVV[A,B] 2.00 2DBT[A,B,C] 3.14	2
Eukaryota
Protein Name	EC#	Organism	GenBank	Uniprot	PDB/3D Carbohydrate Ligands Resolution (Å)	Subf
chitinase (Ch1;Chi2;Chi3)	3.2.1.14	Brassica juncea	AAF02299.1 ABC04842.1	Q9SQF7	2Z37[A,B,C,D] 1.53 2Z38[A] 1.80 2Z39[A,B] 1.70	2
chitinase	3.2.1.14	Canavalia ensiformis	CAA07413.1	O81934	1DXJ[A] 1.8	2
lysozyme / chitinase (major) (partial)	3.2.1.14	Carica papaya		P81241 P85084	3CQL[B] α-D-GlcpNAc β-D-GlcpNAc 1.50 3CQL[A] α-D-GlcpNAc β-D-GlcpNAc 1.50	2
class IV chitinase (Cjp-4)		Cryptomeria japonica	BAD77932.1		5H7T[A] 1.19	2
basic chitinase		Drosera adelae	BAW35424.1		9JTP[A] 1.57 9JTR[A,B] β-D-GlcpNAc 1.73	2
chitinase B (ChiB)	3.2.1.14	Ficus microcarpa	BCS90539.1	A0A915Q9K6 A0A915Q9K7	7V91[A,B,C,D] 1.60 7V92[A,B,C,D] 1.61	2
chitinase A (ChiA;BcChiA;BcChi-A)	3.2.1.14	Gemmabryum coronatum	BAF99002.1	A9ZSX9	3WH1[A] β-D-GlcpNAc-(1-4)-β-D-GlcpNAc-(1-4)-β-D-GlcpNAc-(1-4)-β-D-GlcpNAc 1.00 4IJ4[A] β-D-GlcpNAc-(1-4)-β-D-GlcpNAc-(1-4)-β-D-GlcpNAc-(1-4)-β-D-GlcpNAc 1.58 7F88[A,B,C] 1.60	2
chitinase-like protein 1 / allergen (Rq30;Clp1;Chi-L1;HbCLP1;Hev b 11.0101)		Hevea brasiliensis	AHF88836.1 CAC42881.1		4MST[A,B] 1.93	2
chitinase		Hordeum vulgare	AAA18586.1 CAA33407.1		1CNS[A,B] 1.91 2BAA[A] 1.80	2
chitinase (Cht2;OsChia1b;Cht-2;Os05g0399300;RCC2)	3.2.1.14	Oryza sativa Japonica Group	BAA03750.1 BAF17390.1 BAS93903.1 CAA40107.1	A0A0P0WM49 Q43294 Q7DNA1	2DKV[A] 2.00 3IWR[A,B] 2.57	2
chitinase (Chia4-Pa2;PaChi)	3.2.1.14	Picea abies	AAQ17051.1 ACM89954.1	C0JR28 Q6WSR8	3HBD[A] 1.80 3HBE[X] 1.55 3HBH[A] 2.25	2
chitinase C (RSC-c)	3.2.1.14	Secale cereale	BAB18520.1	Q9FRV0	4DWX[A,B] 1.80 4DYG[A,B] β-D-GlcpNAc-(1-4)-β-D-GlcpNAc-(1-4)-β-D-GlcpNAc-(1-4)-β-D-GlcpNAc 1.70 4J0L[A] β-D-GlcpNAc-(1-4)-β-D-GlcpNAc-(1-4)-β-D-GlcpNAc-(1-4)-β-D-GlcpNAc 1.90	2
chitinase	3.2.1.14	Simarouba glauca			6LNR[A] 1.66	2
chitinase (VuCYLP)		Vigna unguiculata	BAC53632.1		3W3E[A,B] 1.50	2
chitinase	3.2.1.14	Vigna unguiculata subsp. sesquipedalis	AAG23965.1	Q9FUH3	4TX7[A] 1.55	2
chitinase (ChiA)	3.2.1.14	Zea mays LH82	ACX37090.1	D0EM57 P29022	4MCK[A] 1.50	2
unclassified
Protein Name	EC#	Organism	GenBank	Uniprot	PDB/3D Carbohydrate Ligands Resolution (Å)	Subf
chitinase (Anc4)	3.2.1.14	synthetic construct			8X2V[A] 1.29 8X2W[A] 1.40 8HNE[A] 1.13	2
chitinase (Anc5)	3.2.1.14	synthetic construct			8HNF[A] 1.57	2
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