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1. (Article ID: 885)
 
Komandrova NA, Tomshich SV, Isakov VV, Romanenko LA
Structure of sulfated O-specific polysaccharide of the marine bacterium Pseudoalteromonas marinoglutinosa KMM 232
Biochemistry (Moscow) 63(10) (1998) 1200-1204
 

A sulfated O-specific polysaccharide containing D-mannose, L-rhamnose, and the sulfate group was obtained by mild acid hydrolysis of lipopolysaccharide (S-form) of the marine bacterium Pseudoalteromonas marinoglutinosa KMM 232. Based on analysis of methylation and 13C NMR spectroscopy of native and desulfated polysaccharides, the following structure of disaccharide repeat unit in the O-specific polysaccharide has been established: [scheme]. This is the first report of a sulfated O-specific polysaccharide isolated from gram-negative bacteria.

structure, polysaccharide, NMR spectroscopy, bacteria, O-specific, O-specific polysaccharide, PAGE, marine, Pseudoalteromonas, sulfated

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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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