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1. (Article ID: 656)
 
Gorshkova RP, Nazarenko EL, Zubkov VA, Ivanova EP, Gorshkova NM, Isakov VV
Structure of O-specific polysaccharide from Pseudoalteromonas nigrifaciens strain KMM 161
Biochemistry (Moscow) 67(6) (2002) 672-675
 

On mild acid degradation of the lipopolysaccharide of the marine microorganism Pseudoalteromonas nigrifaciens KMM 161 an O-specific polysaccharide containing D-galactose, 2-acetamido-2-deoxy-D-glucose, 3,6-dideoxy-3-(4-hydroxybutyramido)-D-galactose, and 2-acetamido-2-deoxy-L-guluronic acid residues was obtained. From the results of Smith degradation, O-deacetylation of the polysaccharide, and NMR spectroscopy the following structure of the tetrasaccharide repeating unit of the O-specific polysaccharide was established [figure]. It should be noted that the same structure occurs in the antigenic polysaccharide of Pseudoalteromonas nigrifaciens KMM 158 described earlier as Alteromonas macleodii 2MM6

structure, strain, polysaccharide, O-specific, O-specific polysaccharide, Alteromonas, Pseudoalteromonas, Alteromonas macleodii, Pseudoalteromonas nigrifaciens, 4-hydroxybutanoic acid

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2. (Article ID: 4435)
 
Nazarenko EL, Komandrova NA, Gorshkova RP, Tomshich SV, Zubkov VA, Kilcoyne M, Savage AV
Structures of polysaccharides and oligosaccharides of some Gram-negative marine Proteobacteria
Carbohydrate Research 338(23) (2003) 2449-2457
 

The chemical structures of polysaccharides and LPS core oligosaccharides, isolated from various Gram-negative marine bacteria from the genera Pseudoalteromonas and Shewanella belonging to the Alteromonadaceae family and gamma-subclass of Proteobacteria, are reviewed. The polysaccharides are distinguished by the acidic character (e.g., due to the presence of hexuronic and aldulosonic acids and their derivatives) and the occurrence of unusual sugars, including N-acyl derivatives of 6-deoxyamino sugars, such as N-acetyl-D-quinovosamine, N-acetyl-L-fucosamine and N-acetyl-6-deoxy-L-talosamine, and higher sugars like 2,6-dideoxy-2-acetamido-4-C-(3'-carboxamide-2',2'-dihydroxypropyl)-D-galac topyranose (shewanellose). Many constituent sugars have various uncommon non-sugar substituents, such as alanine, formic, lactic and hydroxybutyric acids, sulfate, phosphate, and 2-aminopropane-1,3-diol.

Lipopolysaccharide, oligosaccharide structure, O-antigen, polysaccharide structure, Shewanella, Pseudoalteromonas, Proteobacteria

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