A polypeptide includes, in the amino acid sequence of SEQ ID NO: 1 or a similar sequence, at least one specific amino acid substitution on at least one of the 14th, 37th, 209th, 293rd, and 319th amino acid residues from the N-terminal of the amino acid sequence of SEQ ID NO: 1. A polynucleotide, an expression cassette, a vector, and a transformant include a base sequence encoding the amino acid sequence of the polypeptide. A method of producing the polypeptide and a method of producing 2-deoxy-scyllo-inosose are also provided.

The present invention discloses isolated polynucleotide encoding enzymes, derived from the fungus Macrophomina phaseolina (“M. phaseolina”), responsible for degrading pectin, and it comprises and/or consists of nucleotide sequences set forth in SEQ ID Nos. 2, 5, 8, 11, 14, 17, 20, 23, 26, 29, 32, 35, 38, 41, 44, 47, 50, 53, 56, 59, 62, 1, 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43, 46, 49, 52, 55, 58 and 61, or the complement of such sequences. The present invention also relates to isolated polypeptide encoded by the polynucleotide sequences set forth in SEQ ID Nos. 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60 and 63; a recombinant gene construct comprising the polynucleotide; a transformant and a transgenic fungus comprising the recombinant gene construct, with or having enhanced production of pectin degrading enzyme. The polypeptide of the invention can be used for, amongst other things, manufactured fruit juice, textile products, pulp and paper, coffee, tea and oil extraction and pectic waste water treatment.

The present application relates to a method of producing drimenol and/or drimenol derivatives by comprising contacting at least one polypeptide with farnesyl diphosphate (FPP). The method may be performed in vitro or in vivo. Also provided are amino acid sequences of polypeptides useful in the methods and nucleic acids encoding the polypeptides described. The method further provides host cells or organisms genetically modified to express the polypeptides and useful to produce drimenol and/or derivatives of drimenol.

The invention provides a method for producing a terpene or a precursor thereof by microbial fermentation. Typically, the method involves culturing a recombinant bacterium in the presence of a gaseous substrate whereby the bacterium produces a terpene or a precursor thereof, such as mevalonic acid, isopentenyl pyrophosphate, dimethylallyl pyrophosphate, isoprene, geranyl pyrophosphate, farnesyl pyrophosphate, and/or farnesene. The bacterium may comprise one or more exogenous enzymes, such as enzymes in mevalonate, DXS, or terpene biosynthesis pathways.

Presented herein are biocatalysts and methods for converting C1-containing materials to organic acids such as muconic acid or adipic acid.

The present invention provides an aspartase mutant, a recombinant expression vector and recombinant bacterium containing the aspartase mutant, and the use thereof, and belongs to the technical field of genetic engineering. The amino acid sequence of the aspartase mutant is as set forth in SEQ ID NO: 1. In the aspartase mutant of the present invention, on the basis of wild type aspartase (with an amino acid sequence as set out in SEQ ID NO: 3), glutamic acid at position 427 is mutated into glutamine. In the present invention, by mutating the amino acid residue at position 427 into glutamine, the polar environment near an active site is changed, and thus ammonia supply during substrate reaction is further facilitated, thereby improving an enzyme activity, enhancing the ability of the enzyme in synthesizing a -amino acid, and providing a practical and effective strategy for industrial production of the -amino acid.

Disclosed is a microorganism of Escherichia sp. producing O-acetyl homoserine, and a method of producing O-acetyl homoserine in high yield using the microorganism.

The present invention relates to a method for producing a lysine carboxylase mutant strain, characteristics of the mutant strain, a gene encoding the lysine decarboxylase mutant strain, and a method for producing cadaverine using the same. The present invention provides lysine decarboxylase derived from E. coli improved through a protein engineering variation. In addition, the lysine decarboxylase mutant strain of the present invention increases activity, pH stability, and thermal stability at the time of producing cadaverine, thereby reducing production costs, through increasing a yield and productivity.

Plasmid vectors and use of plasmid vectors in methods for producing methane and isoprene using Archaea are disclosed. Particularly, plasmid vectors that express isoprene synthase (ispS) are prepared and inserted into methanogens, such as Methanosarcina acetivorans, to allow for co-production of methane and isoprene. In one embodiment, the methods of the present disclosure can be used for wastewater management.

A lyase has an amino acid sequence selected from SEQ ID NOs: 1, 2 and 3, wherein the amino acid isoleucine in position no. 468 in the protein ApPDC-E469G, which is modified with respect to the wild type from Acetobacter pasteurianus, is replaced by an amino acid which occupies less space than isoleucine.