Polyhydroxyalkanoate synthesis from alcohols during the growth of Paracoccus denitrificans

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Abstract

Several alcohols were examined as substrates for the polyhydroxyalkanoate synthesis by Paracoccus denitrificans. The bacterium synthesized a homopolyester of poly(3-hydroxybutyrate) from ethanol. When n-pentanol was used as growth substrate, homopolyester poly(3-hydroxyvalerate) was synthesized, whereas copolyester poly(3-hydroxybutyrate-co-3-hydroxyvalerate) accumulated during bacterial growth on n-propanol. When alcohols were automatically fed as growth substrates, ethanol, n-propanol, and n-pentanol gave higher polyester content. Although poly(3-hydroxybutyrate) was synthesized from methanol or n-butanol, its content was very low. Under nitrogen-deficient conditions, polyester content in cells increased, especially with ethanol, n-propanol, and n-pentanol. Using a mixture of two alcohols P. denitrificans could synthesize polyesters with varying relative ratios of 3-hydroxybutyrate to 3-hydroxyvalerate.

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Yamane, T., Chen, X. F., & Ueda, S. (1996). Polyhydroxyalkanoate synthesis from alcohols during the growth of Paracoccus denitrificans. FEMS Microbiology Letters, 135(2–3), 207–211. https://doi.org/10.1016/0378-1097(95)00451-3

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