D-rhamnan and teichuronic acid from the cell wall of Rathayibacter caricis VKM Ac-1799T

The cell wall of Rathayibacter cari cis VKM Ac-1799 T (family Microbacteriaceae , class Actinobacteria ) was found to contain both neutral and acidic glycopolymers. The first one is D-rhamnopyranan with main chain →2)-α-D-Rha p -(1 → 3)-α-D-Rha p -(1→, where a part of 2-substituted residues bears as a side-chain at position 3 α-D-Man p residues or disaccharides α-D-Ara f -(1→2)-α-D-Man p -(1 → . The second polymer is a teichuronic acid with a branched repeating units composed of seven monosaccharides →4)-α-[β-D-Man p -(1 → 3)]-D-Glc p -(1 → 4)-β-D-Glc p A-(1 → 2)-β-[4,6Pyr]-D-Man p -(1 → 4)-β-L-Rha p -(1 → 4)-β-D-Glc p -(1 → 4)-β-D-Glc p -(1 → . The structures of the polymers were determined by chemical and NMR spectroscopic methods. • The D-rhamnan and teichuronic acid were isolated from Rathayibacter cariscis VKM Ac-1799 T cell wall. • The structures of the polymers were determined by chemical and NMR spectroscopic methods. • D-rhamnan is composed of linear and branched repeating units. • The teichuronic acid consists of pyruvilated branched heptosaccharide units.