491results about "Acyltransferases" patented technology

The invention relates to a diacylglycerol acyltransferase capable of synthesizing triglyceride as well as a coding gene and application of the diacylglycerol acyltransferase, and belongs to the field of enzymology, the nucleotide sequence of the gene for coding the diacylglycerol acyltransferase is as shown in SEQ ID NO.1, and the amino acid sequence of the diacylglycerol acyltransferase is as shown in SEQ ID NO.2. The invention also provides a recombinant plasmid and a recombinant engineering bacterium containing the gene of the enzyme. Diglyceride and an acyl donor are used as substrates, and triglyceride is catalytically synthesized through an acyl transfer reaction by using the enzyme. The invention provides an efficient tool for realizing enzymatic biosynthesis and large-scale production of natural triglyceride.

The invention relates to recombinant escherichia coli for de novo synthesis of piceatannol as well as a construction method and application thereof, and belongs to the field of synthetic biology and metabolic engineering. According to the invention, an L-tyrosine production strain is used as an original strain, five key genes required for synthesizing piceatannol are combined and connected to a plasmid vector, and a recombinant plasmid is introduced into the original strain, so that an engineering strain for heterologous synthesis of piceatannol is successfully constructed. According to the invention, the yield of piceatannol is further obviously improved through copy number optimization.

Described is an antibody-drug conjugate (ADC) having the formula A-L, wherein A is an antibody or an antibody fragment and wherein L is a linker, said linker comprising: as a first payload a topoisomerase I inhibitor which is cell-permeable, e.g., a camptothecin cytotoxic molecule which is cell-permeable; as a second payload a topoisomerase I inhibitor which is not cell-permeable, e..g., a camptothecin cytotoxic molecule which is not cell-permeable; and as a as a third payload a toxin or a cytotoxin, e.g., an auristatin such asMMAE (Monomethyl auristatin E). Moreover, described is a pharmaceutical composition comprising said ADC and at least one pharmaceutically acceptable ingredient. Further, described method of treating a patient suffering from, being at risk of developing, and / or being diagnosed for a neoplastic disease.

This invention specifically relates to a de novo 7-DHC-synthesizing *Saccharomyces cerevisiae* genetically engineered strain, its construction method, and its applications, belonging to the field of biotechnology. Using *Saccharomyces cerevisiae* engineered strain SC9 as the starting strain, this invention utilizes multiple copies of tHMG1, DHCR24, and ERG1 via the TY transposon, multiple copies of ERG2, POS5, ERG7, ERG11, IDI1, and ERG3 via the TY transposon, and single copies of POS5, ERG3, and DHCR24 in the genome to increase the intracellular content of reducing coenzyme II and enhance the main pathway of 7-DHC synthesis. Single copies of ACL, ACS1, ERG10, and ERG19 in the genome enhance the utilization of ethanol in *Saccharomyces cerevisiae* and dynamically regulate the synthesis of 7-DHC. The *Saccharomyces cerevisiae* genetically engineered strain constructed by this invention exhibits high product accumulation, laying the foundation for replacing traditional multi-step chemical synthesis routes and realizing industrial production.

The invention belongs to the technical field of food, and provides a special enzyme composition for infant soybean milk powder and soybean milk powder thereof. A three-stage directional enzymolysis technology is adopted, the three-stage directional enzymolysis technology comprises glutamine transaminase deamidation pretreatment, bacillus subtilis protease-trypsin-papain first-stage hydrolysis and aminopeptidase-phytase-beta-glucosidase second-stage hydrolysis, and conductivity control, carbon dioxide ventilation in-situ complexation and spray drying processes are combined. The free amino nitrogen of the product is increased by more than or equal to 20%, the proportion of 200-1500Da peptide fragments is more than or equal to 70%, the median particle size is 50-180 microns, the water activity is less than or equal to 0.30, the instant dissolving time is less than or equal to 30 seconds at 25 DEG C under the water hardness of 15-200ppm, the settling rate is less than or equal to 3% after standing for 30 minutes, and the zeta potential is-10 to-25mV. The palatability contradiction between deep hydrolysis and bitterness inhibition of the bean-based infant formula powder, the brewing contradiction between high-calcium reinforcement and instant stability and the process controllability contradiction between three-stage enzymolysis and ionic strength accumulation are effectively solved, and the bean-based infant formula powder has wide application value in the fields of bean-based infant formula food and vegetable protein nutritional products.

The invention belongs to the technical field of bioengineering, and discloses a genetic engineering strain for enhancing schizochytrium limacinum DHA oil production based on carbon flux guidance and fatty acid transport, a method and application thereof. The gene engineering strain is obtained by introducing an optimized coding gene ACLY and / or Fat1p coding gene related to guiding carbon flux and fatty acid transport into a schizochytrium limacinum body; wherein the gene sequence of the gene ACLY is SEQ ID No. 9, and the gene sequence of the gene Fat1p is SEQ ID No. 10. According to the invention, a schizochytrium limacinum engineering bacterium for enhancing DHA oil production based on carbon flux guidance and fatty acid transfer is constructed by means of metabolic engineering. The schizochytrium limacinum engineering bacterium is combined with fatty acid transfer based on carbon flux guiding, can be used for grease synthesis by guiding carbon flux, and can prevent grease from being degraded through fatty acid transfer.

The invention relates to the technical field of synthetic biology, in particular to a squalene high-yield saccharomyces cerevisiae engineering bacterium and a construction method and application thereof.Saccharomyces cerevisiae CEN.PK.2-1D is used as an original strain, pentose phosphate pathway genes ZWF1, GND1, TAL1 and TKL1 and IDP1 genes of TCA circulation are integrated in a genome of the original strain through homologous recombination, and the squalene high-yield saccharomyces cerevisiae engineering bacterium is obtained. Constructing a dual-channel cofactor supply system to improve the intracellular NADPH level and the NADPH / NADP + ratio; according to the saccharomyces cerevisiae genetic engineering strain Sc-Sq04 constructed by the method disclosed by the invention, the yield of squalene obtained by shake flask fermentation reaches 741.08 + / -28.9 mg / L by further integrating all genes of an MVA way, ERG20 and ERG9 genes, and a new thought is provided for transforming saccharomyces cerevisiae to synthesize terpene compounds and promoting industrial application.

The invention belongs to the technical field of bioengineering, and discloses a high-yield hyaluronic acid bacillus subtilis strain for expressing a hyaluronic acid synthase gene, a construction method and application, and the construction method comprises the following steps: inserting a codon-optimized sphaasA gene into a lytH site in a bacillus subtilis 168 strain in a traceless manner by utilizing a CRISPR / dCas9 system; the preparation method comprises the following steps: synthesizing hyaluronic acid oligosaccharides, simultaneously integrating genes for expressing a synthetic pathway of hyaluronic acid oligosaccharides, reducing the transcriptional level of zwf and pfkA genes, weakening the metabolic flux of a competitive pathway, and finally increasing the expression of sphaasA and tuaD genes according to a ratio of 2: 1 by using plasmids and the interaction of protein scaffolds RIAD and RIDD. When the strain is fermented for 48 hours in a 5L fermentation tank, the yield of the hyaluronic acid reaches 38.02 g / L, and the average molecular weight HA Mw of the low-molecular-weight hyaluronic acid is about (5-13) * 10 < 4 > Da.

An engineered microorganism comprising (i) a heterologous nucleic acid encoding a first lysophosphatidic acid acyltransferase (LPAAT) and (ii) a heterologous nucleic acid encoding a glycerol-3-phosophate acyltransferase (GPAT), a diacylglycerol acyltransferase (DGAT), or a second LPAAT; or a microorganism comprises (i) a heterologous nucleic acid encoding a first lysophosphatidic acid acyltransferase (LPAAT), and (ii) a heterologous nucleic acid encoding a glycerol-3-phosophate acyltransferase (GPAT) or a second LPAAT, optionally further comprising (iii) a heterologous nucleic acid encoding a DGAT; or a microorganism comprising (i) a heterologous nucleic acid encoding a first lysophosphatidic acid acyltransferase (LPAAT), and (ii) a heterologous nucleic acid encoding a second LPAAT, optionally further comprising (iii) a heterologous nucleic acid encoding a DGAT and / or GPAT; or a microorganism comprising a specific LPAAT2, optionally further comprising a heterologous nucleic acid encoding a glycerol-3-phosophate acyltransferase (GPAT), a diacylglycerol acyltransferase (DGAT), or a second LPAAT, and use for the production of triacylglycerol.

The invention discloses a recombinant bacterium capable of increasing the yield of alpha-bisabolol as well as a preparation method and application of the recombinant bacterium, and belongs to the technical field of microorganisms. The invention aims to improve the yield of alpha-bisabolol and enhance the tolerance of a host to an organic solvent. The invention provides a recombinant bacterium for improving the yield of alpha-bisabolol. Escherichia coli is used as a starting strain; the method comprises the following steps of: overexpressing an acetyl CoA acyltransferase / HMG-CoA reductase mvaE gene, an HMG-CoA synthetase mvaS gene, a 2-methyl citrate dehydratase prpD gene, a mevalonate kinase ERG12 gene, a mevalonate 5-phosphate kinase ERG8 gene, a mevalonate 5-diphosphate decarboxylase ERG19 gene and an isopentenyl diphosphate isomerase idi gene, so as to obtain a recombinant vector; the gene is obtained from an alpha-bisabolol synthase gene of artichoke, a farnesyl diphosphate synthase ispA gene and an alpha-bisabolol synthase CcBOS gene of artichoke. The industrial process of synthesizing alpha-bisabolol by a biological method is promoted.

A composition for use in treatment or prevention of a TAR DNA-binding protein 43 related disease, comprising a promoting substance that increases an intracellular amount of a protein having ubiquitination activity.

Methods for producing plants with increased growth or productivity are provided. [Solution] Plants with altered photorespiratory characteristics are presented herein. Disruption of transport proteins involved in shuttling glycolate and / or glycerate results in reduced photosynthetic rates, reduced plant growth, and altered gene expression and photosynthetic metabolite profiles. Such disruption can also be combined with the introduction of genes expressing components of alternative photorespiratory enzyme pathways to increase photosynthetic efficiency.

The disclosure relates to methods for treating cancers (e.g., cancers having a BRCA1 and / or BRCA2 mutation(s)) by administering to the subject an effective amount of a ubiquitin-specific protease 1 (USP1) inhibitor.

The invention discloses recombinant saccharomyces cerevisiae, a 11-seed oil fermentation product as well as a preparation method and application of the 11-seed oil fermentation product, and belongs to the technical field of synthetic biology and fermentation product preparation. According to the recombinant saccharomyces cerevisiae disclosed by the invention, a caffeic acid coenzyme A ligase 4CL coding gene, a chalcone isomerase CHI coding gene, a flavanone-3-hydroxylase F3H coding gene and a chalcone synthase CHS mutant coding gene are over-expressed, and the chalcone synthase CHS mutant is preferably Y69H / H71Y / Q161K. The preparation method of the 11-seed oil fermentation product comprises the following steps: fermenting a recombinant saccharomyces cerevisiae fermentation solution in the presence of a sophora flower bud extract and caffeic acid to obtain a first fermentation solution; fermenting the lactic acid bacteria fermentation liquor in the presence of 11 seed oil to obtain second fermentation liquor; and mixing the first fermentation liquid and the second fermentation liquid, continuing fermentation, and respectively collecting an oil phase and a water phase after fermentation is finished, so as to obtain a fermentation product. The product provided by the invention has multivitamin antioxidant activity.

The invention discloses a processing technology for replacing monosodium glutamate by compounding a umami peptide extract, and belongs to the technical field of food biologication.A polypeptide umami material is prepared by taking animal raw materials and fungus raw materials as mixed raw materials; comprising the following steps: processing animal raw materials into meat paste for later use; crushing a fungus raw material to obtain fungus sludge for later use; putting the meat paste into a stirring tank, adding an emulsion stabilizer, uniformly stirring, adding the bacterial paste, and continuously uniformly stirring, so as to obtain a pre-emulsification system; adding a TG enzyme slow-release agent into the pre-emulsification system, carrying out a reaction, transferring into an ultrasonic homogenizer, carrying out ultrasonic homogenization treatment, transferring into a high-pressure homogenizer, and carrying out high-pressure homogenization treatment to obtain a substrate; performing enzymolysis, purification, impurity removal and drying on the substrate to obtain umami peptide extract dry powder; the flavor peptide extract dry powder and maltodextrin are put into a mixing machine to be evenly mixed, the polypeptide flavor seasoning is obtained, and the polypeptide flavor seasoning is a target product. According to the invention, a high-quality product is obtained.

The invention provides a 2, 5-dimethylpyrazine production strain and a construction method and application thereof.According to the strain, key feedback inhibition is relieved through a perfect metabolic engineering strategy and strategies of knocking out a competitive pathway, introducing heterologous aminoacetone oxidase, deleting L-threonine efflux protein and the like, competitive enzyme conversion of aminoacetone is reduced through a system, and the 2, 5-dimethylpyrazine production strain is obtained. Spontaneous transformation of aminoacetone in Escherichia coli is enhanced, metabolism of L-threonine is expanded to synthesis of 2, 5-dimethylpyrazine, the yield of 2, 5-dimethylpyrazine is further increased, the constructed strain does not contain plasmids and has the advantages of clear genetic background, sustainable transformation and the like, and the 2, 5-dimethylpyrazine is produced through fermentation. The method is simple to operate, can be used for directly synthesizing 2, 5-dimethylpyrazine from the beginning by using a cheap carbon source, and has a very good application prospect.

This invention relates to a diacylglycerol acyltransferase derived from Antarctic krill, its encoding gene, and its applications, belonging to the field of enzymology. The nucleotide sequence of the gene encoding the enzyme is shown in SEQ ID NO.1, and the amino acid sequence of the enzyme is shown in SEQ ID NO.2. This invention also provides a recombinant plasmid containing the gene of the enzyme and a recombinant engineered bacterium. Furthermore, it describes the use of this enzyme to catalyze the synthesis of triglycerides via an acyl transfer reaction using diacylglycerol and an acyl donor as substrates. This invention provides an efficient tool for the enzymatic biosynthesis and large-scale production of natural triglycerides.

The present disclosure describes compositions, preparations, nanoparticles (such as lipid nanoparticles), and / or nanomaterials and methods of their use, including compounds of Formula (I) or a pharmaceutically acceptable salt thereof.

The invention relates to euphausia superba-derived diacylglycerol acyltransferase as well as a coding gene and application thereof, and belongs to the field of enzymology, the nucleotide sequence of the gene for coding the enzyme is as shown in SEQ ID NO.1, and the amino acid sequence of the enzyme is as shown in SEQ ID NO.2. The invention further discloses a preparation method of the euphausia superba-derived diacylglycerol acyltransferase. The invention also provides a recombinant plasmid and a recombinant engineering bacterium containing the gene of the enzyme. Diglyceride and an acyl donor are used as substrates, and triglyceride is catalytically synthesized through an acyl transfer reaction by using the enzyme. The invention provides an efficient tool for realizing enzymatic biosynthesis and large-scale production of natural triglyceride.

Disclosed is a novel genetically modified microorganism showing improved yields of 3-hydroxyadipic acid and / or α-hydromuconic acid. The genetically modified microorganism is a microorganism having an ability to produce 3-hydroxyadipic acid and / or α-hydromuconic acid, in which the reaction to generate malic acid from oxaloacetic acid is enhanced, and the reaction to generate acetyl-CoA from pyruvic acid is enhanced. In addition, the reaction to generate carbon dioxide from formic acid is enhanced.

The invention discloses a rice photo-thermo-sensitive male sterility mutant Osgpat6.1, a corresponding gene locus OsGPAT6.1 of the rice photo-thermo-sensitive male sterility mutant Osgpat6.1 and application of a coding protein of the rice photo-thermo-sensitive male sterility mutant The phenotypic gene OsGPAT6.1 for controlling the photo-thermo-sensitive male sterility of the rice is obtained by cloning through phenotypic analysis of a mutant and preliminary positioning of a target gene, an amino acid sequence of the phenotypic gene OsGPAT6.1 is encoded as shown in SEQ ID NO.1 to form a protein, and the gene affects the development process of rice pollen by affecting tapetum degradation. The OsGPAT6.1 gene is subjected to gene editing, or a mutant allele of the OsGPAT6.1 gene is introduced into a conventional rice variety in a hybridization manner, so that a photo-thermo-sensitive male sterile material for a two-line sterile line can be obtained. The gene and the encoding protein thereof can be applied to creation of photo-thermo-sensitive sterile rice and germplasm genetic improvement of the photo-thermo-sensitive sterile rice.

The present invention relates to a method for cultivating a microorganism, preferably a Saccharomycetales yeast, capable of utilizing ethanol as feedstock. The invention is directed to a method for the production of biomass, in particular single cell protein, wherein the yeast single cell protein product comprises Saccharomycetales yeast cells, as well as to an animal feed comprising such biomass.

The present disclosure relates to methods, compositions and kits for treating conditions that are related to the modulation of expression of 5′-Aminolevulinate Synthase 1 (ALAS1) by gene editing.

The present disclosure relates to methods, cells, and compositions for producing a product of interest, e.g., a recombinant protein. In particular, the present disclosure provides improved mammalian cells expressing the product of interest, where the cells (e.g., Chinese Hamster Ovary (CHO) cells) have reduced or eliminated activity, e.g., expression, of certain host cell proteins, e.g., enzymes including, but not limited to, certain lipases, esterases, and / or hydrolases.

The invention relates to the technical field of artificial design of enzymes, in particular to an artificial intelligence design and expression system construction method and system for lysosomal membrane protein type N-acetyltransferase with 11 transmembrane regions, and the method comprises the following steps: collecting reaction rate information of an enzyme and a substrate, associating a structure model with rate parameters, and comparing three-dimensional difference of residues, according to the method, by collecting the reaction rate correlation structure conformation, dynamic recognition of the key conformation state is achieved, the accuracy of three-dimensional space difference analysis is improved, host expression optimization factors are fused in the construction process, and the construction efficiency is improved. According to the method, the expression efficiency is improved, conformation function screening and structural stability parallel evaluation are carried out, the screening accuracy of efficient catalysis and stable expression is enhanced, three links of recognition, screening and construction are broken through, the target enzyme obtaining efficiency and expression quality are improved, and enzyme engineering is promoted to be developed towards high-throughput systematization.

The present invention relates to a method for producing glycolipids in recombinant host cells and to a novel glycolipid obtained by said method as well as nucleic acid molecules used in this method.

The invention provides an N-deacetylase / N-sulfotransferase and an application of the N-deacetylase / N-sulfotransferase. According to the invention, systematic stability design and surface electrostatic optimization are carried out on the N-deacetylation structural domain of NDST, and multiple engineering strategies such as structural domain fusion and linker peptide optimization are combined to synergistically improve the specific activity, substrate affinity and bifunctional catalytic synergy of enzyme. Experimental results show that the specific enzyme activity of the modified NDST mutant is obviously higher than that of natural enzyme while the difunctional catalytic capability is maintained.

The invention provides a recombinant Yarrowia lipolytica. The recombinant Yarrowia lipolytica comprises a heterologous polynucleotide encoding a fusion protein. The fusion protein comprises a first amino acid sequence and a second amino acid sequence. The first amino acid may be homologous to the amino acid sequence of 3-ketoacyl CoA thiolase (3KAT), The second amino acid sequence may be homologous to the amino acid sequence of a fatty acyl-CoA reductase (FAR). Also provided is a method for producing one or more fatty alcohols by the recombinant Yarrowia lipolytica and a method for preparing the recombinant Yarrowia lipolytica.

The present invention relates to a microbial cell for producing at least one lipid with general formula (II) from at least one carbon substrate, wherein R1 and R2 independently of one another comprises identical or different organic radicals each with 5 to 13 carbon atoms, wherein the cell is a non-pathogenic cell that is genetically modified to increase the heterologous expression relative to the wild-type cell of: - Enzyme E1 a 3-(3-hydroxyalkanoyloxy)alkanoic acid (HAA) synthase comprising SEQ ID NO: 1, SEQ ID NO: 7, SEQ ID NO:11, SEQ ID NO: 15 or a variant thereof, wherein the variant comprises 60% sequence identity to SEQ ID NO: 1, 7, 11 or 15; and - Enzyme E2 a glycosyltransferase (EC 2.4) comprising SEQ ID NO: 2, SEQ ID NO: 8, or SEQ ID NO: 12, or a variant thereof, wherein the variant comprises 60% sequence identity to SEQ ID NO: 2, 8 or 12.

The disclosure relates to isolated nucleic acid molecules comprising at least two double stranded inhibitory ribonucleic acid (RNA) molecules adapted to silence by RNA interference either the same gene or different genes to enhance silencing thereby modulating gene expression.