Carbohydrate esterase, sialic acid-specific acetylesterase. The catalytic triad of this esterase enzyme comprises residues Ser127, His403 and Asp391 in UniProtKB:P70665.

Putative catalytic NodB homology domain of PgaB, IcaB, and similar proteins which consist of a deformed (beta/alpha)8 barrel fold with 5- or 6-strands. This family belongs to the large and functionally diverse carbohydrate esterase 4 (CE4) superfamily, whose members show strong sequence similarity with some variability due to their distinct carbohydrate substrates. It includes bacterial poly-beta-1,6-N-acetyl-D-glucosamine N-deacetylase PgaB, hemin storage system HmsF protein in gram-negative species, intercellular adhesion proteins IcaB, and many uncharacterized prokaryotic polysaccharide deacetylases. It also includes a putative polysaccharide deacetylase YxkH encoded by the Bacillus subtilis yxkH gene, which is one of six polysaccharide deacetylase gene homologs present in the Bacillus subtilis genome. Sequence comparison shows all family members contain a conserved domain similar to the catalytic NodB homology domain of rhizobial NodB-like proteins, which consists of a deformed (beta/alpha)8 barrel fold with 6 or 7 strands. However, in this family, most proteins have 5 strands and some have 6 strands. Moreover, long insertions are found in many family members, whose function remains unknown.

Putative catalytic NodB homology domain of gellan lyase and similar proteins. This family is represented by the extracellular polysaccharide-degrading enzyme, gellan lyase (gellanase, EC 4.2.2.-), from Bacillus sp. The enzyme acts on gellan exolytically and releases a tetrasaccharide of glucuronyl-glucosyl-rhamnosyl-glucose with unsaturated glucuronic acid at the nonreducing terminus. The family also includes many uncharacterized prokaryotic polysaccharide deacetylases, which show high sequence similarity to Bacillus sp. gellan lyase. Although their biological functions remain unknown, all members of the family contain a conserved domain with a 6-stranded beta/alpha barrel, which is similar to the catalytic NodB homology domain of rhizobial NodB-like proteins, belonging to the larger carbohydrate esterase 4 (CE4) superfamily.

Putative catalytic NodB homology domain of uncharacterized prokaryotic polysaccharide deacetylases which consist of a 6-stranded beta/alpha barrel. This family contains uncharacterized prokaryotic polysaccharide deacetylases. Although their biological functions remain unknown, all members of the family contain a conserved domain with a 6-stranded beta/alpha barrel, which is similar to the catalytic NodB homology domain of rhizobial NodB-like proteins, belonging to the larger carbohydrate esterase 4 (CE4) superfamily.

Polysaccharide deacetylase. This domain is found in polysaccharide deacetylase. This family of polysaccharide deacetylases includes NodB (nodulation protein B from Rhizobium) which is a chitooligosaccharide deacetylase. It also includes chitin deacetylase from yeast, and endoxylanases which hydrolyzes glucosidic bonds in xylan.

CrystalStructure of the Putative Acetylxylan Esterase from Clostridium acetobutylicum, Northeast Structural Genomics Target CaR6 [Clostridium acetobutylicum ATCC 824],1ZMB_B Crystal Structure of the Putative Acetylxylan Esterase from Clostridium acetobutylicum, Northeast Structural Genomics Target CaR6 [Clostridium acetobutylicum ATCC 824],1ZMB_C Crystal Structure of the Putative Acetylxylan Esterase from Clostridium acetobutylicum, Northeast Structural Genomics Target CaR6 [Clostridium acetobutylicum ATCC 824],1ZMB_D Crystal Structure of the Putative Acetylxylan Esterase from Clostridium acetobutylicum, Northeast Structural Genomics Target CaR6 [Clostridium acetobutylicum ATCC 824],1ZMB_E Crystal Structure of the Putative Acetylxylan Esterase from Clostridium acetobutylicum, Northeast Structural Genomics Target CaR6 [Clostridium acetobutylicum ATCC 824],1ZMB_F Crystal Structure of the Putative Acetylxylan Esterase from Clostridium acetobutylicum, Northeast Structural Genomics Target CaR6 [Clostridium acetobutylicum ATCC 824]

ChainA, Glycoside Hydrolase, Family 11:clostridium Cellulosome Enzyme, Dockerin Type I:polysaccharide [Acetivibrio thermocellus],2C79_A Chain A, GLYCOSIDE HYDROLASE, FAMILY 11:CLOSTRIDIUM CELLULOSOME ENZYME, DOCKERIN TYPE I:POLYSACCHARIDE [Acetivibrio thermocellus]

X-RayStructure of Protein from Arabidopsis Thaliana AT4G34215 at 1.6 Angstrom Resolution [Arabidopsis thaliana],2APJ_B X-Ray Structure of Protein from Arabidopsis Thaliana AT4G34215 at 1.6 Angstrom Resolution [Arabidopsis thaliana],2APJ_C X-Ray Structure of Protein from Arabidopsis Thaliana AT4G34215 at 1.6 Angstrom Resolution [Arabidopsis thaliana],2APJ_D X-Ray Structure of Protein from Arabidopsis Thaliana AT4G34215 at 1.6 Angstrom Resolution [Arabidopsis thaliana]

Structureof Streptococcus pneumoniae peptidoglycan deacetylase (SpPgdA) [Streptococcus pneumoniae R6]

Structureof Streptococcus pneumoniae peptidoglycan deacetylase (SpPgdA) D 275 N Mutant. [Streptococcus pneumoniae R6]

Probable carbohydrate esterase At4g34215 OS=Arabidopsis thaliana OX=3702 GN=At4g34215 PE=1 SV=2

Uncharacterized protein YlxY OS=Bacillus subtilis (strain 168) OX=224308 GN=ylxY PE=3 SV=2

Chitin deacetylase 1 OS=Cryptococcus neoformans var. grubii serotype A (strain H99 / ATCC 208821 / CBS 10515 / FGSC 9487) OX=235443 GN=CDA1 PE=1 SV=1