Teichuronic acid: a mucopolysaccharide present in wall preparations from vegetative cells of Bacillus subtilis

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Abstract
Cell-wall preparations made from vegetative cells of Bacillus subtilis strain 6346 contain at least four polymers: (a) a mucopeptide consisting of glucosamine, 3-carboxyethylglucosamine (muramic acid), glutamic acid, [alpha] [image] -diamino-pimelic acid, alanine and probably a trace of glycine; (b) an insoluble protein; (c) teichoic acid; (d) a mucopolysaccharide called here teichuronic acid. Teichuronic acid consists of equimolar amounts of N-acetylgalacto-samine and glucuronic acid. The glycosidic linkage between at least part of the glucuronic acid and the N-acetylgalactosamine in teichuronic acid is likely to be on C-3 of the amino sugar. The properties of teichuronic acid strongly suggest that the glycosidic bonds are a in configuration.