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1. (Article ID: 4444)
 
Gnilozub VA, Streshinskaya GM, Evtushenko LI, Shashkov AS, Naumova IB
Lipoteichoic acids of Agromyces species
Mikrobiologiia = Microbiology [Russian] 63(3) (1994) 275-279
 

Lipoteichoic acids were isolated from four tyoe strains belonging to the genus Agromyces. The structure of lipoteichoic acids, which was established chemically and by 13C-NMR spectroscopy, was similar in all four strains. The hydrophilic part of these acids was represented by 1.3-poly(glycerolphosphate) carrying a-galactopyranosyl and O-acetyl substituents at the C-2 position of glycerol. O-acetyl substituents in lipoteichoic acids were discovered for the first time. The quantity of substituents in the four lipoteichoic acids was different. In the hydrophobic part, predominating fatty acids were anteiso-pentadecanoic, iso-hexadecanoic, and anteiso-hexadecanoic, and also n-octadecanoic in the case of A. fucosus ssp. fucosus and A. fucosus ssp. hippuratus.

structure, lipoteichoic acid, glycerol, Agromyces

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2. (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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