Cell wall polymers of Actinomadura carminata ИНА 4281статья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Abstract. The cell walls of Actinomadura carminata INA 4281 were found to contain peptidoglycan, teichoic acid,and nonpeptidoglycan amino acids. The peptidoglycan was of the A17 type and contained a small amount of LL-DAP in addition to m-DAP. The teichoic acid was an 1,3-poly(glycerol phosphate) chain composed of about eight glycerophosphate units, two of which had a 2-acetamido-2-deoxy-c~-D-galactopyranosyl substituent and one, a 3-0-
methyl-fl-D-galactopyranosyl-(1 --> 3)-2-acetamido-2-deoxy-C~-D-galactopyranosyl residue at C2 of glycerol. The structure of the polymer was identified by chemical analysis and 13C_
NMR spectroscopy. The teichoic acid contained 3-0-methyl-D-galactose (madurose) - the first ever finding of this compound within a teichoic acid. The nonpeptidoglycan
amino acids made up some 30% of the cell wall's dry weight,about a quarter of the amino acids being removable with sodium dodecyl sulfate. Further treatment of the cell walls with LiC1 and guanidine hydrochloride caused only a smallloss of the amino acids and slight changes in their molar ratio.