expression in Pyrococcus furiosus from which the native aldehyde oxidoreductase (AOR) gene is deleted. A strain containing the Thermoanaerobacter ethanolicus AdhE in a synthetic operon with AdhA is constructed. The AdhA gene is amplified from Thermoanaerobacter sp. X514. The amino acid sequence of AdhA from Thermoanaerobacter sp. X514 is identical to that of AdhA from Thermoanaerobacter ethanolicus. Of the bacterial strains expressing the various heterologous AdhE genes, only those containing AdhE and AdhA from Thermoanaerobacter sp. produced ethanol above background. The Thermoanaerobacter ethanolicus AdhEA strain containing both AdhE and AdhA produces the most ethanol (4.2 mM), followed by Thermoanaerobacter ethanolicus AdhE strain (2.6 mM), Thermoanaerobacter ethanolicus AdhA strain (1.8 mM) and Thermoanaerobacter sp. X514 AdhE strain (1.5 mM). Ethanol and acetate are the only major carbon end-products from glucose under these conditions. For these four strains, the amount of ethanol produced per estimated glucose consumed is increased from the background level to 1.2, 1.0, 0.8 and 0.7 respectively
expression of the enzyme from Thermoanaerobacter sp. X514 in Pyrococcus furiosus from which the native aldehyde oxidoreductase (AOR) gene is deleted. Ethanol and acetate are the only major carbon end-products from glucose under these conditions. The amount of ethanol produced per estimated glucose consumed is increased from the background level 0.7 respectively
gene pduP, recombinant expression in Escherichia coli strain JCL166, strain JCL166 cannot grow anaerobically unless complemented by an exogenous fermentation pathway such as n-butanol biosynthesis. Recombinant coexpression of PduP with the enzymes of the n-butanol synthesis pathway in Synechococcus elongatus strain PCC 7942 results in autotrophic n-butanol production