The present disclosure provides engineered ketoreductase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase enzyme including the capability of reducing 5-((4S)-2-oxo-4-phenyl (1,3-oxazolidin-3-yl))-1-(4-fluorophenyl) pentane-1,5-dione to (4S)-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyl-1,3-oxazolidin-2-one. Also provided are polynucleotides encoding the engineered ketoreductase enzymes, host cells capable of expressing the engineered ketoreductase enzymes, and methods of using the engineered ketoreductase enzymes to synthesize the intermediate (4S)-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-4-phenyl-1,3-oxazolidin-2-one in a process for making Ezetimibe.

The invention relates to a host cell, preferably a Myceliophthora thermophila cell, which presents a lower expression and/or secretion of non-contributory cellulolytic enzymes, preferably where the non-contributory cellulolytic enzyme is endoglucanase 6 comprising SEQ ID NO: 2, thereby promoting the presence of contributory cellulolytic enzymes in the enzymatic cocktail synthesised by said host cell. The invention also relates to the use of said host cells and the enzymatic cocktails synthesised by said host cells for the production of fermentable sugars of biomass and a method for producing bioproducts, preferably bioethanol, comprising the use of said host cell or the composition according to the invention.

Disclosed is a recombinant microorganism comprising endogenous enzymes that convert CO and/or CO.sub.2 to acetyl-CoA. The recombinant microorganism contains a heterologous nucleic acid sequence encoding one or more enzymes that allow the conversion of acetyl-CoA to an alkene with a main chain of 1 to 5 carbon atoms. The heterologous nucleic acid sequence comprises one or more coding sequences encoding one or more enzymes that catalyse the conversion of acetyl-CoA to crotonyl-CoA, and that further catalyse the conversion of crotonyl-CoA to an alkene; or one or more coding sequences encoding one or more enzymes that catalyse the conversion of acetyl-CoA to 3-methylcrotonyl-CoA, and that further catalyse the conversion of 3-methylcrotonyl-CoA to an alkene; or one or more coding sequences encoding one or more enzymes that catalyse the conversion of acetyl-CoA to propionyl-CoA, and that further catalyse the conversion of propionyl-CoA to an alkene. Each coding sequence is operationally linked to a transcriptional promoter.

Disclosed is a recombinant microorganism comprising endogenous enzymes that convert CO and/or CO.sub.2 to acetyl-CoA. The recombinant microorganism contains a heterologous nucleic acid sequence encoding one or more enzymes that allow the conversion of acetyl-CoA to an alkene with a main chain of 1 to 5 carbon atoms. The heterologous nucleic acid sequence comprises one or more coding sequences encoding one or more enzymes that catalyse the conversion of acetyl-CoA to crotonyl-CoA, and that further catalyse the conversion of crotonyl-CoA to an alkene; or one or more coding sequences encoding one or more enzymes that catalyse the conversion of acetyl-CoA to 3-methylcrotonyl-CoA, and that further catalyse the conversion of 3-methylcrotonyl-CoA to an alkene; or one or more coding sequences encoding one or more enzymes that catalyse the conversion of acetyl-CoA to propionyl-CoA, and that further catalyse the conversion of propionyl-CoA to an alkene. Each coding sequence is operationally linked to a transcriptional promoter.

A composition of microorganisms, comprising photoautotrophic microorganisms (16) which produce oxygen by photosynthetic water oxidation chemoheterotrophic microorganisms (17) which respire oxygen, wherein the photoautotrophic microorganisms (16) and the chemoheterotrophic microorganisms (17) are comprised in a biofilm (13), the biofilm further comprising components (15) which were secreted by the photoautotrophic microorganisms (16) and/or the chemoheterotrophic microorganisms (17),
and a reactor (1), a method for forming a biofilm, and a method for biocatalytic conversion employing such composition.

The present invention provides for a system for converting CO.sub.2 and H.sub.2 to one or more biologically derived compounds. In some embodiments, the system comprises a host cell comprising one or more nucleic acids encoding genes for a recombinant surface display protein which is capable of tethering an electrocatalyst molecule, such as a cobalt(II) complex supported by tetradentate polypyridyl ligand 2-bis(2-pyridyl)(methoxy)methyl-6-pyridylpyridine (PY4), and enzymes for synthesizing a biologically derived compound, such as an alkane, alcohol, fatty acid, ester, or isoprenoid.

The present invention provides for a system for converting CO.sub.2 and H.sub.2 to one or more biologically derived compounds. In some embodiments, the system comprises a host cell comprising one or more nucleic acids encoding genes for a recombinant surface display protein which is capable of tethering an electrocatalyst molecule, such as a cobalt(II) complex supported by tetradentate polypyridyl ligand 2-bis(2-pyridyl)(methoxy)methyl-6-pyridylpyridine (PY4), and enzymes for synthesizing a biologically derived compound, such as an alkane, alcohol, fatty acid, ester, or isoprenoid.

The present invention relates to a transformant which is transformed to express Baeyer-Villiger monooxygenase (BVMO), a method for producing C5-C14 medium-chain ω-hydroxy fatty acids, α,ω-dicarboxylic acids, ω-amino fatty acids, or alcohols from C16-C20 long-chain fatty acids by biotransformation using the transformant, a method for producing a fatty acid derivative having an ester group which is introduced into the chain thereof from keto fatty acid using the BVMO, and novel ω-hydroxy fatty acids which are prepared by the method. Degradation products such as C5 to C14 ω-hydroxy fatty acids, α,ω-dicarboxylic acids, ω-amino fatty acids, alcohols can be produced in a large amount from C16 to C20 long-chain fatty acids contained in a medium by biotransformation using a transformant capable of expressing BVMO of the present invention. Therefore, it can be widely used to produce ω-hydroxy fatty acids, α,ω-dicarboxylic acids, ω-amino fatty acids or alcohols in a more safe and economic manner.

The present invention relates to isolated polypeptides having glucoamylase activity and isolated polynucleotides encoding the polypeptides. The invention also relates to nucleic acid constructs, vectors, and host cells comprising the polynucleotides as well as methods of producing and using the polypeptides.

Provided are labdenediol diphosphate synthase polypeptides, sclareol synthase polypeptides, nucleic acid molecules encoding the labdenediol diphosphate synthase polypeptides and sclareol synthase polypeptides, and methods of using the labdenediol diphosphate synthase polypeptides, sclareol synthase polypeptides. Also provided are methods for producing labdenediol diphosphate, sclareol and (−)-ambroxide.