Abstract
The advent of molecular biological techniques and a developing environmental awareness initiated a renewed scientific interest in Polyhydroxyalkanoates (PHAs) and the biosynthetic machinery for PHA metabolism has been the area of research over the last two decades. PHAs are polyesters of hydroxyalkanoates synthesized by numerous bacterial species with atleast five different PHA biosynthetic pathways. These are accumulated as an intracellular carbon and energy storage material. This diversity, in combination with genetic and molecular engineering has opened up this area for development of optimum PHA producing organisms. Even though PHAs have been recognized as a good candidate for biodegradable plastics, their industrial application is limited owing to high production cost. The classical microbiology and modern molecular biology have been brought together to decipher the intricacies of PHA metabolism both for production purposes and for the unraveling of the natural role of PHA. This review provides an overview of the different PHA biosynthetic systems, the enzymes involved in PHA biosynthesis and there genetic background followed by a detailed summation of how this natural diversity is being used to develop commercially attractive recombinant process for large scale production of PHAs.
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Naik, S., Venu Gopal, S.K. & Somal, P. Bioproduction of polyhydroxyalkanoates from bacteria: a metabolic approach. World J Microbiol Biotechnol 24, 2307–2314 (2008). https://doi.org/10.1007/s11274-008-9745-z
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DOI: https://doi.org/10.1007/s11274-008-9745-z