The present invention relates to a cytochrome P450 enzyme comprising the amino acid sequence set forth in SEQ ID NO: 3, or a variant thereof having an amino acid sequence having at least 95% identity thereto and having CYP450 activity. The cytochrome P450 enzyme provided herein was isolated from Streptomyces eurythermus NRRL 2539 and has a wide substrate range and high activity, and may be used to oxidate organic compounds.

The present invention relates to a cytochrome P450 enzyme comprising the amino acid sequence set forth in SEQ ID NO: 3, or a variant thereof having an amino acid sequence having at least 95% identity thereto and having CYP450 activity. The cytochrome P450 enzyme provided herein was isolated from Streptomyces eurythermus NRRL 2539 and has a wide substrate range and high activity, and may be used to oxidate organic compounds.

The present invention provides a carbonyl reductase having the activity of reducing a carbonyl group-containing compound to convert the compound into an optically active compound, and a production method of an optically active compound using the enzyme. Specifically, a carbonyl reductase having one or more mutations in which the 54th aspartic acid, the 157th methionine, the 170th alanine, the 211th isoleucine, the 214th methionine, and the 249th methionine are each substituted by other specific amino acid in the amino acid sequence shown in SEQ ID NO: 1 or a homologue of the amino acid sequence, and a production method of an optically active compound using the same are provided.

The instant disclosure is in the field of biosciences, more particularly towards molecular and industrial biotechnology. The present disclosure relates to recombinant methanotrophic bacteria capable of synthesizing indigo from methane, a method of developing said recombinant methanotrophic bacteria, and a method of indigo biosynthesis by the recombinant methanotrophic bacteria in presence of a methane source.

The present invention relates to a method of extracting a low-molecular-weight proanthocyanidin using cranberries and lactic acid bacteria, and more particularly, the method may include (S1) growing and extracting a seed culture from cranberries, (S2) reinforcing the metabolism of a saccharide by adjusting a metabolic process, (S3) extracting the seed culture whose metabolic process is adjusted and culturing the extracted result, (S4) mixing cranberries, distilled water and a saccharide with the grown seed culture and fermenting the mixture, and (S5) extracting an unbound polyphenol from the fermented mixture.

The present disclosure provides engineered carboxyesterase enzymes that have the ability to catalyze amide bond formation. Also provided are polynucleotides encoding the carboxyesterase enzymes, host cells capable of expressing the engineered carboxyesterase enzymes, and methods of using the engineered carboxyesterase enzymes to make commercially valuable amides. Also provided are amides that are made using the engineered carboxyesterase enzymes.

The present disclosure provides engineered carboxyesterase enzymes that have the ability to catalyze amide bond formation. Also provided are polynucleotides encoding the carboxyesterase enzymes, host cells capable of expressing the engineered carboxyesterase enzymes, and methods of using the engineered carboxyesterase enzymes to make commercially valuable amides. Also provided are amides that are made using the engineered carboxyesterase enzymes.

The invention relates to the field of pharmaceutical synthesis, in particular to a preparation method of (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol derivatives and their intermediates. The preparation method is carried out starting from compound Formula A1. ##STR00001## In the preparation of (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol derivatives, the chirality was constructed by enzymatic method, and the products were prepared with high optical purity. The preparation method can be used to produce the key intermediates of (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol of darunavir commercially, which is a very economical route suitable for industrial production.

The present disclosure includes refactored thaxtomin biosynthetic gene clusters including thaxtomin modules including one or more thaxtomin genes such that the expression of the refactored thaxtomin biosynthetic gene cluster produces at least one thaxtomin compound in the absence of thaxtomin-inducing conditions. Also included are genetically engineered Streptomyces bacterium from a non-pathogenic Streptomyces strain comprising an exogenous, refactored thaxtomin biosynthetic gene cluster of the present disclosure, such that the expression of the refactored thaxtomin biosynthetic gene cluster provides the genetically engineered Streptomyces bacterium with the ability to produce at least one thaxtomin compound in the absence of thaxtomin-inducing conditions. The present disclosure also includes methods of producing thaxtomin compounds, analogs, or intermediate with the refactored thaxtomin biosynthetic gene clusters and genetically engineered bacteria of the present disclosure.

The present disclosure provides cytochrome P450 variants useful for carrying out in vivo and in vitro carbene insertion reactions. Methods for preparing carbene insertion products including cyclopropenes, cyclopropanes, bicyclobutanes, substituted lactones, cyclized compounds, and substituted amines are also described.