RESUMEN
The Actinoplanes philippinensis cell wall has several anionic carbohydrate-containing polymers. The major polymer is of poly(glycosylglycerol phosphate) type, its monomeric unit being O-alpha-D-mannopyranosyl-(1----4)-beta-D- galactopyranosyl-(1----1)-glycerol monophosphate. The phosphodiester linkages connect the C3 of glycerol units and the C6 of galactosyl ones, and the mannosyl residues form side branches of the teichoic acid's main chain. Chains without mannosyl residues were found in addition to the major teichoic acid. The structure of the polymers was established by chemical analysis, and 13C and 1H NMR spectroscopy. It is for the first time that a teichoic acid with mannosyl residues was found in bacterial cell walls. The phosphorylated mannan contains, in addition to mannose, 2-O-methylmannose. The main chain has alpha-1,2, alpha-1,3 and alpha-1,6 types of substitution, which was established by 13C NMR spectroscopy.