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 a hypothetical protein Ecf1 from Escherichia coli and similar proteins. This family contains a hypothetical protein Ecf1 from Escherichia coli and its prokaryotic homologs. Although their biochemical properties remain to be determined, members in this family contain a conserved domain with a 5-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 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.

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.

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.

Crystalstructure of the putative polysaccharide deacetylase BA0330 from bacillus anthracis [Bacillus anthracis],4V33_B Crystal structure of the putative polysaccharide deacetylase BA0330 from bacillus anthracis [Bacillus anthracis]

CrystalStructure of BC0361, a polysaccharide deacetylase from Bacillus cereus [Bacillus cereus ATCC 14579]

CrystalStructure of a Bacillus anthracis peptidoglycan deacetylase [Bacillus anthracis],6GO1_B Crystal Structure of a Bacillus anthracis peptidoglycan deacetylase [Bacillus anthracis]

Structureof Bacillus subtilis PdaA in complex with NAG, a family 4 Carbohydrate esterase. [Bacillus subtilis],1W1A_2 Structure of Bacillus subtilis PdaA in complex with NAG, a family 4 Carbohydrate esterase. [Bacillus subtilis],1W1B_1 Structure of Bacillus subtilis PdaA with Cadmium, a family 4 Carbohydrate esterase. [Bacillus subtilis],1W1B_2 Structure of Bacillus subtilis PdaA with Cadmium, a family 4 Carbohydrate esterase. [Bacillus subtilis]

Structureof Bacillus subtilis PdaA, a family 4 Carbohydrate esterase. [Bacillus subtilis],1W17_B Structure of Bacillus subtilis PdaA, a family 4 Carbohydrate esterase. [Bacillus subtilis]

Peptidoglycan-N-acetylmuramic acid deacetylase PdaA OS=Bacillus subtilis (strain 168) OX=224308 GN=pdaA PE=1 SV=1

Uncharacterized 30.6 kDa protein in fumA 3'region OS=Geobacillus stearothermophilus OX=1422 PE=3 SV=1