Competition between beta-ketothiolase and citrate synthase during poly(beta-hydroxybutyrate) synthesis in Methylobacterium rhodesianum.


The enzymes beta-ketothiolase and citrate synthase from the facultatively methylotrophic Methylobacterium rhodesianum MB 126, which uses the serine pathway, were purified and characterized. The beta-ketothiolase had a relatively high Km for acetyl-CoA (0.5 mM) and was strongly inhibited by CoA (Ki 0.02 mM). The citrate synthase had a much higher affinity… (More)


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