Structure of the O-polysaccharide of Providencia alcalifaciens O2 containing ascarylose and N-(l-alanyl)-d-glucosamine
The O-polysaccharide was obtained by degradation of the lipopolysaccharide of Providencia alcalifaciens O2 under mild acidic conditions followed by GPC. The polysaccharide was found to contain two unusual components: 3,6-dideoxy-l-arabino-hexose (ascarylo
Ovchinnikova, Olga G.,Moryl, Magdalena,Shashkov, Alexander S.,Chizhov, Alexander O.,Arbatsky, Nikolay P.,Shpirt, Anna M.,Rozalski, Antoni,Knirel, Yuriy A.
Long-chain O-ascarosyl-alkanediols are constitutive components of Caenorhabditis elegans but do not induce dauer larva formation
Two long-chain ascarosides, O-ascarosylnonacosane-2,28-diol (1) and O-ascarosyluntriacontane-2,30-diol (2), were isolated from Caenorhabditis elegans and detected in all developmental stages of the worm. The long-chain ascarosides were shown to be minor lipid components, and it was also shown that they do not induce dauer larva formation.