Effects of homologous phosphoenolpyruvate-carbohydrate phosphotransferase system proteins on carbohydrate uptake and poly(3-Hydroxybutyrate) accumulation in Ralstonia eutropha H16.

ABSTRACT: Seven gene loci encoding putative proteins of the phosphoenolpyruvate-carbohydrate phosphotransferase system (PEP-PTS) were identified in the genome of Ralstonia eutropha H16 by in silico analysis. Except the N-acetylglucosamine-specific PEP-PTS, an additional complete PEP-PTS is lacking in strain H16. Based on these findings, we generated single and multiple deletion mutants defective mainly in the PEP-PTS genes to investigate their influence on carbon source utilization, growth behavior, and poly(3-hydroxybutyrate) (PHB) accumulation. As supposed, the H16 ΔfrcACB and H16 ΔnagFEC mutants exhibited no growth when cultivated on fructose and N-acetylglucosamine, respectively. Furthermore, a transposon mutant with a ptsM-ptsH insertion site did not grow on both carbon sources. The observed ph

SUBMITTER: Kaddor C 

PROVIDER: S-EPMC3127587 | biostudies-literature | 2011 Jun

REPOSITORIES: biostudies-literature