Putative glycoside hydrolase Family 18, chitinase_18; This DUF is likely to be a form of ...
25-344
1.66e-161
Putative glycoside hydrolase Family 18, chitinase_18; This DUF is likely to be a form of glycosyl hydrolase from CAZy family 18, possibly chitinase 18. This would have the EC number of EC:3.2.1.14.
:
Pssm-ID: 435166 Cd Length: 325 Bit Score: 454.32 E-value: 1.66e-161
Putative glycoside hydrolase Family 18, chitinase_18; This DUF is likely to be a form of ...
25-344
1.66e-161
Putative glycoside hydrolase Family 18, chitinase_18; This DUF is likely to be a form of glycosyl hydrolase from CAZy family 18, possibly chitinase 18. This would have the EC number of EC:3.2.1.14.
Pssm-ID: 435166 Cd Length: 325 Bit Score: 454.32 E-value: 1.66e-161
Endo-beta-N-acetylglucosaminidases are bacterial chitinases that hydrolyze the chitin core of ...
54-329
1.12e-64
Endo-beta-N-acetylglucosaminidases are bacterial chitinases that hydrolyze the chitin core of various asparagine (N)-linked glycans and glycoproteins. The endo-beta-N-acetylglucosaminidases have a glycosyl hydrolase family 18 (GH18) catalytic domain. Some members also have an additional C-terminal glycosyl hydrolase family 20 (GH20) domain while others have an N-terminal domain of unknown function (pfam08522). Members of this family include endo-beta-N-acetylglucosaminidase S (EndoS) from Streptococcus pyogenes, EndoF1, EndoF2, EndoF3, and EndoH from Flavobacterium meningosepticum, and EndoE from Enterococcus faecalis. EndoS is a secreted endoglycosidase from Streptococcus pyogenes that specifically hydrolyzes the glycan on human IgG between two core N-acetylglucosamine residues. EndoE is a secreted endoglycosidase, encoded by the ndoE gene in Enterococcus faecalis, that hydrolyzes the glycan on human RNase B.
Pssm-ID: 119359 Cd Length: 255 Bit Score: 205.69 E-value: 1.12e-64
Putative glycoside hydrolase Family 18, chitinase_18; This DUF is likely to be a form of ...
25-344
1.66e-161
Putative glycoside hydrolase Family 18, chitinase_18; This DUF is likely to be a form of glycosyl hydrolase from CAZy family 18, possibly chitinase 18. This would have the EC number of EC:3.2.1.14.
Pssm-ID: 435166 Cd Length: 325 Bit Score: 454.32 E-value: 1.66e-161
Endo-beta-N-acetylglucosaminidases are bacterial chitinases that hydrolyze the chitin core of ...
54-329
1.12e-64
Endo-beta-N-acetylglucosaminidases are bacterial chitinases that hydrolyze the chitin core of various asparagine (N)-linked glycans and glycoproteins. The endo-beta-N-acetylglucosaminidases have a glycosyl hydrolase family 18 (GH18) catalytic domain. Some members also have an additional C-terminal glycosyl hydrolase family 20 (GH20) domain while others have an N-terminal domain of unknown function (pfam08522). Members of this family include endo-beta-N-acetylglucosaminidase S (EndoS) from Streptococcus pyogenes, EndoF1, EndoF2, EndoF3, and EndoH from Flavobacterium meningosepticum, and EndoE from Enterococcus faecalis. EndoS is a secreted endoglycosidase from Streptococcus pyogenes that specifically hydrolyzes the glycan on human IgG between two core N-acetylglucosamine residues. EndoE is a secreted endoglycosidase, encoded by the ndoE gene in Enterococcus faecalis, that hydrolyzes the glycan on human RNase B.
Pssm-ID: 119359 Cd Length: 255 Bit Score: 205.69 E-value: 1.12e-64
The GH18 (glycosyl hydrolase, family 18) type II chitinases hydrolyze chitin, an abundant ...
137-237
8.31e-09
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.
Pssm-ID: 119349 [Multi-domain] Cd Length: 210 Bit Score: 55.08 E-value: 8.31e-09
This conserved domain family includes a large number of catalytically inactive chitinase-like ...
138-237
2.91e-03
This conserved domain family includes a large number of catalytically inactive chitinase-like lectins (chitolectins) including YKL-39, YKL-40 (HCGP39), YM1, oviductin, and AMCase (acidic mammalian chitinase), as well as catalytically active chitotriosidases. The conserved domain is an eight-stranded alpha/beta barrel fold belonging to the family 18 glycosyl hydrolases. The fold has a pronounced active-site cleft at the C-terminal end of the beta-barrel. The chitolectins lack a key active site glutamate (the proton donor required for hydrolytic activity) but retain highly conserved residues involved in oligosaccharide binding. Chitotriosidase is a chitinolytic enzyme expressed in maturing macrophages, which suggests that it plays a part in antimicrobial defense. Chitotriosidase hydrolyzes chitotriose, as well as colloidal chitin to yield chitobiose and is therefore considered an exochitinase. Chitotriosidase occurs in two major forms, the large form being converted to the small form by either RNA or post-translational processing. Although the small form, containing the chitinase domain alone, is sufficient for the chitinolytic activity, the additional C-terminal chitin-binding domain of the large form plays a role in processing colloidal chitin. The chitotriosidase gene is nonessential in humans, as about 35% of the population are heterozygous and 6% homozygous for an inactivated form of the gene. HCGP39 is a 39-kDa human cartilage glycoprotein thought to play a role in connective tissue remodeling and defense against pathogens.
Pssm-ID: 119351 [Multi-domain] Cd Length: 362 Bit Score: 39.08 E-value: 2.91e-03
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
of the residues that compose this conserved feature have been mapped to the query sequence.
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