The Bacteroides thetaiotaomicron protein represented by pdb structure 3CO4 is an uncharacterized bacterial member of the family 18 glycosyl hydrolases with homologs found in Flavobacterium, Stigmatella, and Pseudomonas.

Glycosyl hydrolases family 18.

Glyco_18 domain.

The GH18 (glycosyl hydrolase, family 18) type II chitinases hydrolyze chitin, an abundant polymer of beta-1,4-linked N-acetylglucosamine (GlcNAc) which is a major component of the cell wall of fungi and the exoskeleton of arthropods. Chitinases have been identified in viruses, bacteria, fungi, protozoan parasites, insects, and plants. The structure of the GH18 domain is an eight-stranded beta/alpha barrel with a pronounced active-site cleft at the C-terminal end of the beta-barrel. The GH18 family includes chitotriosidase, chitobiase, hevamine, zymocin-alpha, narbonin, SI-CLP (stabilin-1 interacting chitinase-like protein), IDGF (imaginal disc growth factor), CFLE (cortical fragment-lytic enzyme) spore hydrolase, the type III and type V plant chitinases, the endo-beta-N-acetylglucosaminidases, and the chitolectins. The GH85 (glycosyl hydrolase, family 85) ENGases (endo-beta-N-acetylglucosaminidases) are closely related to the GH18 chitinases and are included in this alignment model.

The GH18 (glycosyl hydrolases, family 18) type II chitinases hydrolyze chitin, an abundant polymer of N-acetylglucosamine and have been identified in bacteria, fungi, insects, plants, viruses, and protozoan parasites. The structure of this domain is an eight-stranded alpha/beta barrel with a pronounced active-site cleft at the C-terminal end of the beta-barrel.

Crystalstructure of the GH18 chitinase ChiB from the chitin utilization locus of Flavobacterium johnsoniae [Flavobacterium johnsoniae UW101]

Crystalstructure of a chitinase from Bacteroides thetaiotaomicron [Bacteroides thetaiotaomicron VPI-5482],3FND_A Crystal structure of a chitinase from Bacteroides thetaiotaomicron [Bacteroides thetaiotaomicron]

Crystalstructure of Ostrinia furnacalis Group II chitinase catalytic domain 1 [Ostrinia furnacalis],5Y2B_A Crystal structure of Ostrinia furnacalis Group II chitinase catalytic domain 1 in complex with HEPTA-N-ACETYLCHITOOCTAOSE (NAG)7 [Ostrinia furnacalis]

Crystalstructure of Ostrinia furnacalis Group II chitinase catalytic domain 1 in complex with a piperidine-thienopyridine derivative [Ostrinia furnacalis],6JAW_A Crystal structure of Ostrinia furnacalis Group II chitinase catalytic domain 1 in complex with a napthalimide derivative [Ostrinia furnacalis],6JAX_A Crystal structure of Ostrinia furnacalis Group II chitinase catalytic domain 1 in complex with chitooctaose [(GlcN)8] [Ostrinia furnacalis],6JAY_A Crystal structure of Ostrinia furnacalis Group II chitinase catalytic domain 1 in complex with a dipyrido-pyrimidine derivative [Ostrinia furnacalis]

Crystalstructure of chitinase (RmChi1) from Rhizomucor miehei (sp p32 2 1, MR) [Rhizomucor miehei],5YUQ_A Chain A, Chintase [Rhizomucor miehei],5YUQ_B Chain B, Chintase [Rhizomucor miehei],7FBT_A Chain A, Chitinase [Rhizomucor miehei]

Chitotriosidase-1 OS=Homo sapiens OX=9606 GN=CHIT1 PE=1 SV=1

Acidic mammalian chitinase OS=Bos taurus OX=9913 GN=CHIA PE=1 SV=1

Chitinase A1 OS=Niallia circulans OX=1397 GN=chiA1 PE=1 SV=1

Class V chitinase CHIT5 OS=Lotus japonicus OX=34305 GN=CHIT5 PE=1 SV=2

Acidic mammalian chitinase OS=Mus musculus OX=10090 GN=Chia PE=1 SV=2