To The Question About Intracellular Polyhydroxybutyrate Degradation

The investigation of dynamics of 1,214С-acetate flows was carried out in three different regimes of bacteria Cupriavidus eutrophus B-10646 biosynthesis on fructose and acetate: a) in the phase of accumulation of polyhydroxybutyrate; b) in the phase of intracellular PHB degradation and the synthesis of nitrogen compounds; c) in the phase of resynthesis of PHB. It has been shown that in regime of PHB accumulation 80 % of labeled carbon was used for synthesis of PHB. At the condition of PHB degradation both synthesis and degradation take place simultaneously. This confirms the cyclic nature of PHB methabolism.