An integrated process and system for employing low conversion rWGS to prepare a gas fermentation feed stream from a CO.sub.2 source and a hydrogen source in order to produce at least one gas fermentation product. Low conversion rWGS reactors may (1) employ a wider selection of inorganic catalysts then rWGS reactors requiring high temperature operation, (2) allow for use of an electric heater instead of a fired heater to preheat feed stream to the low conversion rWGS reactor, and (3) extend rWGS catalyst life by reducing the amount of water produced in the rWGS reaction.

The disclosure provides methods using mixed substrate cofeeding for bioproduct synthesis, which enables faster, more efficient, and higher yield carbon conversion in various organisms.

The disclosure provides methods using mixed substrate cofeeding for bioproduct synthesis, which enables faster, more efficient, and higher yield carbon conversion in various organisms.

The present invention addresses the problem of providing an effective new means for efficiently reducing the amount of diacylglycerol in a fat/oil (by conversion into triacylglycerol). Disclosed is a method for producing a fat/oil, including a step in which a lipase having a ratio of transesterification activity to hydrolysis activity of 0.007 or higher is caused to act on a diacylglycerol-containing fat/oil.

The present invention addresses the problem of providing an effective new means for efficiently reducing the amount of diacylglycerol in a fat/oil (by conversion into triacylglycerol). Disclosed is a method for producing a fat/oil, including a step in which a lipase having a ratio of transesterification activity to hydrolysis activity of 0.007 or higher is caused to act on a diacylglycerol-containing fat/oil.

The present invention concerns an oleaginous yeast variant of the species Rhodosporidium azoricum characterized by higher biomass yields and intra- cellular lipid accumulation useful for the production of bio-fuels higher, in determined conditions, with respect to the wild type strain of the same species. Furthermore, the invention concerns a method through which said oleaginous yeast variant of the species Rhodosporidium azoricum was obtained. The invention further concerns the lipid production by means of said variant strain of oleaginous yeast of the species Rhodosporidium azoricum.

Modification of the amino acid sequence of a phenylpyruvate decarboxylase from Azospirillum brasilense produces a novel group of phenylpyruvate decarboxylases with improved specificity to certain substrates, including in particular C7-C11 2-ketoacids such as, for example, 2-ketononanoate and 2-keto-octanoate. This specificity enables effective use of the phenylpyruvate decarboxylase in, for example, an in vivo process wherein 2-ketobutyrate or 2-ketoisovalerate are converted to C7-C11 2-ketoacids, and the novel phenylpyruvate decarboxylase converts the C7-C11 2-ketoacid to a C6-C10 aldehyde having one less carbon than the 2-ketoacid. Ultimately, through contact with additional enzymes, such C6-C10 aldehydes may be converted to, for example, C6-C10 alcohols, C6-C10 carboxylic acids, C6-C10 alkanes, and other derivatives. Use of the novel genetically modified phenylpyruvate de carboxylases may represent a lower cost alternative to non-biobased approaches.

Disclosed are transformed cells comprising one or more genetic modifications that affect the lipid content of the cell, e.g., by increasing the concentration of oleic acid in the cell relative to an unmodified cell of the same type. Also disclosed are methods for modifying the lipid content of a cell by increasing the activity of one or more proteins in the cell and/or by decreasing the activity of one or more proteins in the same cell.

Provided is ω3 desaturase having high enzymatic activity even at normal temperature. A polypeptide which consists of an amino acid sequence having an identity of 80% or more with the amino acid sequence represented by SEQ ID NO: 2 and has ω3 desaturation activity on C20 fatty acid, and a gene thereof.

Provided is ω3 desaturase having high enzymatic activity even at normal temperature. A polypeptide which consists of an amino acid sequence having an identity of 80% or more with the amino acid sequence represented by SEQ ID NO: 2 and has ω3 desaturation activity on C20 fatty acid, and a gene thereof.