The present disclosure relates to genetically engineered host cells and methods of producing a lipid-derived compound by employing such host cells. In particular embodiments, the host cell includes a first mutant gene encoding a cytoplasmic tRNA thiolation protein. Optionally, the host cell can include other mutant genes for decreasing fatty alcohol catabolism, decreasing re-importation of secreted fatty alcohol, or displaying other useful characteristics, as described herein.

Recombinant cells and methods for producing methyl ketones, such as medium-chain methyl ketones. The recombinant cells include recombinant acyl-ACP thioesterase genes, recombinant β-ketoacyl-CoA thioesterase genes, and recombinant acyl-CoA synthetase genes, in addition to other modifications. The methods include culturing the recombinant cells to produce the methyl ketones and isolating the produced methyl ketones.

Provided are genetically engineered microorganism that catalyze the synthesis of propane and/or butanol from a suitable substrate such as glucose. Also provided are methods of engineering said genetically engineered microorganism and methods of producing propane and/or butanol using the genetically engineered microorganism.

Described are methods for the production of isobutene comprising the enzymatic conversion of 3-methylcrotonic acid into isobutene wherein said 3-methylcrotonic acid is obtained by the enzymatic conversion of 3-methylcrotonyl-CoA into 3-methylcrotonic acid or wherein said 3-methylcrotonic acid is obtained by the enzymatic conversion of 3-hydroxyisovalerate (HIV) into 3-methylcrotonic acid. It is described that the enzymatic conversion of 3-methylcrotonic acid into isobutene can, e.g., be achieved by making use of a 3-methylcrotonic acid decarboxylase, preferably an FMN-dependent decarboxylase associated with an FMN prenyl transferase, an aconitate decarboxylase (EC 4.1.1.6), a methylcrotonyl-CoA carboxylase (EC 6.4.1.4), or a geranoyl-CoA carboxylase (EC 6.4.1.5).

Described is a recombinant organism or microorganism which is capable of enzymatically converting acetyl-CoA into isobutene, (A) wherein in said organism or microorganism: (i) acetyl-CoA is enzymatically converted into acetoacetyl-CoA, (ii) acetoacetyl-CoA is enzymatically converted into 3-hydroxy-3-methylglutaryl-CoA, (iii) 3-hydroxy-3-methylglutaryl-CoA is enzymatically converted into 3-methylglutaconyl-CoA, (iv) 3-methylglutaconyl-CoA is enzymatically converted into 3-methylcrotonyl-CoA, and (v) wherein said 3-methylcrotonyl-CoA is converted into isobutene by: (a) enzymatically converting 3-methylcrotonyl-CoA into 3-methylcrotonic acid which is then further enzymatically converted into said isobutene; or (b) enzymatically converting 3-methylcrotonyl-CoA into 3-hydroxy-3-methylbutyryl-CoA which is then further enzymatically converted into 3-hydroxy-3-methylbutyric acid which is then further enzymatically converted into 3-phosphonoxy-3-methylbutyric acid which is then further enzymatically converted into said isobutene; (B) wherein said recombinant organism or microorganism has an increased pool of coenzyme A (CoA) over the organism or microorganism from which it is derived due to: (i) an increased uptake of pantothenate; and/or (ii) an increased conversion of pantothenate into CoA. Moreover, described is the use of such a recombinant organism or microorganism for the production of isobutene. Further, described is a method for the production of isobutene by culturing such a recombinant organism or microorganism in a suitable culture medium under suitable conditions.

Described are a genetically modified microorganism and corresponding methods and products. The genetically modified microorganism may include a first gene that encodes an acyl transferase and a second gene that encodes a peptide or protein. One or both of the first and second gene may be heterologous. The genetically modified microorganism may include a modified acyl-CoA biosynthetic pathway configured for one or more of: inducible biosynthesis of an acyl-CoA and over-accumulation of the acyl-CoA. The genetically modified microorganism may be effective upon fermentation to cause acylation of the peptide or protein by the acyl transferase using the acyl-CoA to provide a N-acylated peptide or protein product.

The technology relates in part to biological methods for modifying carbon flux in cells, engineered cells and organisms in which cellular carbon flux has been modified, and methods of using engineered cells and organisms for production of organic molecules.

Provided herein are microorganisms and methods for fermentative production of ß-ketoadipate from gaseous substrates such as carbon dioxide (CO.sub.2), carbon monoxide (CO), and/or hydrogen (H.sub.2). 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.

Described are a genetically modified microorganism and corresponding methods and products. The genetically modified microorganism may include a first gene that encodes an acyl transferase and a second gene that encodes a peptide or protein. One or both of the first and second gene may be heterologous. The genetically modified microorganism may include a modified acyl-CoA biosynthetic pathway configured for one or more of: inducible biosynthesis of an acyl-CoA and over-accumulation of the acyl-CoA. The genetically modified microorganism may be effective upon fermentation to cause acylation of the peptide or protein by the acyl transferase using the acyl-CoA to provide a N-acylated peptide or protein product.

The disclosure relates to methods for the production of natural lactones by bacteria under physiological conditions. The methods employ ybgC proteins having lactonizing activity.