Abstract
The (R)-specific enoyl-CoA hydratase gene (phaJ HS21) from Pseudomonas chlororaphis HS21 was overexpressed in various Pseudomonas strains, alone and in combination with the polyhydroxyalkanoate synthase gene (phaC HS21), for the biosynthesis of polyhydroxyalkanoates (PHAs) of altered monomer composition. Recombinant Pseudomonas strains harboring phaC HS21 and phaJ HS21 generated saturated and unsaturated monomers of C12–C14 in their PHAs. In particular, the level of the 3-hydroxytetradecenoate monomer in recombinant P. chlororaphis HS21 increased by approximately 260%. PhaJHS21 is expected to be useful in the biosynthesis of PHAs consisting of unusual monomer units.