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1. (Article ID: 4451)
 
Naumova IB, Shashkov AS
Anionic polymers in cell walls of Gram-positive bacteria
Biochemistry (Moscow) 62(8) (1997) 809-840
 

Information on the prevalence, compositions, and structures of anionic carbohydrate-containing polymers of cell walls of Gram-positive bacteria is summarized. The data suggest that these polymers are important for normal functioning of bacterial cells and require further studies. Structural data on teichoic acids found in the literature published over the last few years are discussed. This is a very diverse class of polymers whose structure-specific pathways of degradation were studied and NMR spectra were examined. Unique comprehensive tables of 13C-NMR spectroscopic data (mainly obtained by the authors) on these polymers are given in the Appendix. Other tables summarize data on teichuronic acids, sugar-phosphate polymers, acid polysaccharides, and structural variants of bonds between acid polysaccharides and peptidoglycans known from the literature. Functions of anionic polymers and their possible chemotaxonomic applications are discussed

13C-NMR, NMR, structure, cell wall, composition, teichoic acid, teichuronic acid, Gram-positive, gram-positive bacteria, taxonomy

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2. (Article ID: 4456)
 
Potekhina NV, Evtushenko LI, Senchenkova SN, Shashkov AS, Naumova IB
Structures of cell wall teichoic acids of Brevibacterium iodinum VKM Ac-2106T
Biochemistry (Moscow) 69(12) (2004) 1353-1359
 

The structures of two cell wall teichoic acids of Brevibacterium iodinum VKM Ac-2106(T) were studied. The structure of mannitol teichoic acid described earlier was mainly confirmed. This polymer is 1,6-poly(mannitol phosphate) bearing β-D-glucopyranosyl residues at the C-2 of mannitol and pyruvic acid residues at the C-4 and C-5. The absolute configurations of D-mannitol and S-pyruvic acid were found. The following distinctions from the earlier described structure were found: unsubstituted 1,6-poly(mannitol phosphate) residues and residues substituted only by β-D-glucopyranosyl at the C-2 of mannitol but unsubstituted by pyruvic acid are present in the chain. The structure of glycerol teichoic acid present in the cell wall as a minor component (~7%) is also described. This acid is identified as 1,3-poly(glycerol phosphate) substituted at the C-2 of glycerol by 2-acetamido-2-deoxy-α-D-galactopyranosyl residues bearing R-pyruvic acid residues at the C-4 and C-6 of galactose. This polymer is for the first time described in the cell wall of Gram-positive bacteria.

teichoic acids, Brevibacterium, poly(glycerol phosphate), Pyruvic acid acetal, NMR-spectroscopy, poly(mannitol phosphate)

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