Cloning and Sequence Analysis of the Poly(3-Hydroxyalkanoic Acia)-Synthesis Genes of Pseudomonas acidophila

  • Fusako Umeda
  • Yoshiharu Kitano
  • Yuki Murakami
  • Kiyohito Yagi
  • Yoshiharu Miura
  • Tadashi Mlzoguchi
Part of the Applied Biochemistry and Biotechnology book series (ABAB)


Pseudomonas acidophila can grow with CO2 as a sole carbon source by the possession of a recombinant plasmid that clones genes that confer chemolithoautotrophic growth ability derived from the H2-oxidizing bacterium Alcaligenes hydrogenophilus. H2-oxidizing bacteria produce poly(3-hydroxybutyric acid) (PHB) from CO2/ but recombinant P. acidophila can produce the more useful biopolymer poly(3-hydroxyalkanoic acid) (PHA). In this study, the pha genes of P. acidophila were cloned and a sequence analysis was carried out. A gene library was constructed using the cosmid vector pVK102. A recombinant cosmid carrying the pha genes was selected by the complementation of a PHB-negative mutant of Alcaligenes eutrophus H16. The resulting recombinant cosmid pIK7 contained a 14.8-kb DNA insert. Subcloning was done, and the recombinant plasmid pEH74 was selected by hybridization with the A. eutrophus H16 pha genes. Escherichia coli possessing pEH74 produced PHB, indicating that pEH74 contained the pha genes of P. acidophila. The nucleotide sequences of the PHA-synthesis genes pha A (β-ketothiolase), phaB (acetoacetyl-CoA re-ductase), and phaC (PHA synthase) in pEH74 were determined. The homologies of phaA, phaB, and phaC between P. acidophila and A. eutrophus H16 were 64.7, 76.1, and 56.6%, respectively.

Index Entries

polyhydroxyalkanoate polyhydroxybutyrate nucleotide sequence Pseudomonas acidophila 


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Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • Fusako Umeda
    • 1
  • Yoshiharu Kitano
    • 1
  • Yuki Murakami
    • 1
  • Kiyohito Yagi
    • 1
  • Yoshiharu Miura
    • 1
  • Tadashi Mlzoguchi
    • 1
  1. 1.Faculty of Pharmaceutical SciencesOsaka UniversitySuitaJapan

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