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1. (Article ID: 1640)
 
Potekhina NV, Shashkov AS, Streshinskaya GM, Senchenkova SN, Evtushenko LI
Anionic Polymers of the Cell Wall of Brevibacterium linens VKM Ac-2159
Biochemistry (Moscow) 70(9) (2005) 1046-1054
 

Unsubstituted 1,3-poly(glycerol phosphate) and two sugar-1-phosphate polymers were identified in the cell wall of Brevibacterium linens VKM Ac-2159 by NMR spectroscopy and chemical methods. A monomer of one of the sugar-1-phosphate polymers has the branched repeating unit of the following structure: -4)-[β-D-GlcpNAc-(1→3)]-α-D-Glcp-(1-P-. The repeating unit of another sugar-1-phosphate polymer has a linear structure consisting of alternating β- and α-N-acetylglucosamine residues: -4)-β-D-GlcpNAc-(1→6)-α-D-GlcpNAc-(1-P-. Some part of the β-N-acetylglucosaminyl residues bear O-ester-bound succinic acid residues at C-3. The identified sugar-1-phosphate polymers have not been described earlier in cell walls of other bacteria.

structure, cell, chain, polymer, acid, phosphate, bacteria, cell wall, biochemistry, teichoic acids, pyruvic acid, biology, component, galactose, time, teichoic acid, Polymers, Gram-positive, PDF, Acids, glycerol, configuration, absolute configuration, gram-positive bacteria, Brevibacterium, mannitol, anionic, D-mannitol

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2. (Article ID: 3365)
 
Nikolaev AV, Botvinko IV, Ross AJ
Natural phosphoglycans containing glycosyl phosphate units: structural diversity and chemical synthesis
Carbohydrate Research 342(3-4) (2007) 297-344
 

An anomeric phosphodiester linkage formed by a glycosyl phosphate unit and a hydroxyl group of another monosaccharide is found in many glycopolymers of the outer membrane in bacteria (e.g., capsular polysaccharides and lipopolysaccharides), yeasts and protozoa. The polymers (phosphoglycans) composed of glycosyl phosphate (or oligoglycosyl phosphate) repeating units could be chemically classified as poly(glycosyl phosphates). Their importance as immunologically active components of the cell wall and/or capsule of numerous microorganisms upholds the need to develop routes for the chemical preparation of these biopolymers. In this paper, we (1) present a review of the primary structures (known to date) of natural phosphoglycans from various sources, which contain glycosyl phosphate units, and (2) discuss different approaches and recent achievements in the synthesis of glycosyl phosphosaccharides and poly(glycosyl phosphates).

synthesis, structure, polysaccharides, Phosphoglycans, Anomeric phosphodiesters

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