Abstract: The disclosure provides genetically engineered microorganisms and methods for improved biological production of ethylene glycol and precursors of ethylene glycol. The microorganism of the disclosure produces ethylene glycol or a precursor of ethylene glycol through one or more of 5,10-methylenetetrahydrofolate, oxaloacetate, citrate, malate, and glycine. The disclosure further provides compositions comprising ethylene glycol or polymers of ethylene glycol such as polyethylene terephthalate.

Abstract: The disclosure provides genetically engineered microorganisms and methods for improved biological production of ethylene glycol and precursors of ethylene glycol. The microorganism of the disclosure produces ethylene glycol or a precursor of ethylene glycol through one or more of 5,10-methylenetetrahydrofolate, oxaloacetate, citrate, malate, and glycine. The disclosure further provides compositions comprising ethylene glycol or polymers of ethylene glycol such as polyethylene terephthalate.

Abstract: Provided herein are microorganisms and methods for fermentative production of ß-ketoadipate from gaseous substrates such as carbon dioxide (CO2), carbon monoxide (CO), and/or hydrogen (H2). Additionally, the processes provided herein are methods for producing polymers containing ß-ketoadipate, that can potentially enable a circular economy by diverting waste, e.g., plastic waste.

Abstract: The invention relates to a genetically engineered bacterium having an enzyme that converts 3-hydroxyisovaleryl-CoA to 3-hydroxyisovalerate and an enzyme that converts 3-hydroxyisovalerate to isobutylene. Typically, the bacterium is capable of producing isobutylene from a gaseous substrate containing CO, CO2, and/or H2, such as syngas or an industrial waste gas.

Abstract: The invention relates to a genetically engineered bacterium having an enzyme that converts 3-hydroxyisovaleryl-CoA to 3-hydroxyisovalerate and an enzyme that converts 3-hydroxyisovalerate to isobutylene. Typically, the bacterium is capable of producing isobutylene from a gaseous substrate containing CO, CO2, and/or H2, such as syngas or an industrial waste gas.

Abstract: The invention relates to a genetically engineered bacterium having an enzyme that converts acetyl-CoA to acetoacetyl-CoA, an enzyme that converts acetoacetyl-CoA to 3-hydroxybutyryl-CoA, and an enzyme that converts 3-hydroxybutyryl-CoA to 3-hydroxybutyrate. The bacterium may also have enzymes to produce other downstream products, such as 3-hydroxybutyryaldehyde, and 1,3-butanediol. Typically, the bacterium is capable of producing these products from a gaseous substrate, such as syngas or an industrial waste gas.

Abstract: The invention relates to a genetically engineered bacterium having an enzyme that converts acetyl-CoA to acetoacetyl-CoA, an enzyme that converts acetoacetyl-CoA to 3-hydroxybutyryl-CoA, and an enzyme that converts 3-hydroxybutyryl-CoA to 3-hydroxybutyrate. The bacterium may also have enzymes to produce other downstream products, such as 3-hydroxybutyryaldehyde, and 1,3-butanediol. Typically, the bacterium is capable of producing these products from a gaseous substrate, such as syngas or an industrial waste gas.

Abstract: The invention relates to a genetically engineered bacterium comprising an energy-generating fermentation pathway and methods related thereto. In particular, the invention provides a bacterium comprising a phosphate butyryltransferase (Ptb) and a butyrate kinase (Buk) (Ptb-Buk) that act on non-native substrates to produce a wide variety of products and intermediates. In certain embodiments, the invention relates to the introduction of Ptb-Buk into a C1-fixing microoorgansim capable of producing products from a gaseous substrate.

Abstract: The invention relates to a genetically engineered bacterium comprising an energy-generating fermentation pathway and methods related thereto. In particular, the invention provides a bacterium comprising a phosphate butyryltransferase (Ptb) and a butyrate kinase (Buk) (Ptb-Buk) that act on non-native substrates to produce a wide variety of products and intermediates. In certain embodiments, the invention relates to the introduction of Ptb-Buk into a C1-fixing microoorgansim capable of producing products from a gaseous substrate.

Abstract: The invention provides a bacterium with an increased tolerance to butyric acids, such as 2-hydroxybutyric acid (2-HIBA). In particular, the invention provides a bacterium that tolerates at least 2.5 g/L of butyric acid. The bacterium may be derived, for example, from genus Clostridium, Moorella, Oxobacter, Peptostreptococcus, Acetobacterium, Eubacterium, or Butyribacterium.

Abstract: The invention provides a recombinant, acetogenic, carboxydotrophic bacterium that lacks secondary alcohol dehydrogenase or comprises an inactivated secondary alcohol dehydrogenase. The inactivated secondary alcohol dehydrogenase may be encoded by a secondary alcohol dehydrogenase gene comprising an inactivating mutation that reduces the ability of the bacterium to convert acetone to isopropanol and to convert methyl ethyl ketone to 2-butanol. Since a bacterium that lacks secondary alcohol dehydrogenase or comprises an inactivated secondary alcohol dehydrogenase accumulates carbonyl-containing compounds, the invention also provides a method of producing carbonyl-containing compounds, such as acetone and methyl ethyl ketone.