Mol Microbiol. 1991 Mar;5(3):535-42.

Physiology and molecular genetics of poly(beta-hydroxy-alkanoic acid) synthesis in Alcaligenes eutrophus.

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Institut für Mikrobiologie, Göttingen, Germany.

Abstract

The Alcaligenes eutrophus genes for beta-ketothiolase, NADPH-dependent acetoacetyl-CoA reductase and poly(beta-hydroxybutyric acid) synthase (PHB synthase) which comprise the three-step PHB-biosynthetic pathway, were cloned. Molecular studies revealed that these genes are organized in a single operon. The A. eutrophus PHB-biosynthetic genes are readily expressed in other bacteria, and DNA fragments harbouring the operon can be used as a cartridge to confer to other bacteria the ability to synthesize PHB from acetyl-CoA. The biochemical and physiological capabilities of A. eutrophus for the synthesis of a wide variety of polyhydroxyalkanoates are discussed.

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