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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: 4466)
 
Streshinskaya GM, Naumova IB, Shashkov AS, Kozlova YI, Terekhova LP, Galatenko GA
Structural peculiarities of cell wall polymers of Actinomadura polychroma INA 2755
Biochemistry (Moscow) 56(12) (1991) 1610-1618
 

The cell wall of Actinomadura polychroma INA 2755 contains three major polymers. One of them, peptidoglycan, is related to the type AIg and contains, alongside with meso-A2 pm, also small quantities of the its LL-sterioisomer and glycine. Teichoic acid represents a 1,3-poly(glycerophosphate), in which about 14 % of glycerophosphate units are substituted for by a disaccharide (3-O-methyl-b-D-galactopyranosyl-(1-3)-2-acetamido-2-deoxy-a-D-galactopyranoside). The protein is bound to the cell wall by noncovalent bonds, makes up to about 30 % of its dry weight and is represented by a fraction with Mr of 60 kDa. The cell wall also contains galactosamine which remains bound to the peptidoglycan after its treatment with trichloroacetic acid, trypsin and sodium dodecyl sulfate. The galactosamine content is equimolar to that of peptidoglycan glucosamine.

cell wall, teichoic acid, peptidoglycan, Actinomadura, 3-O-methylgalactose, Actinomadura polychroma

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