825 results about "Enzyme system" patented technology

Disclosed are nucleic acid and amino acid sequences for acetolactate synthase, acetolactate synthase regulatory regions, α-tubulin promoter, a promoter from a Thraustochytriales polyketide synthase (PKS) system, and fatty acid desaturase promoter, each from a Thraustochytriales microorganism. Also disclosed are recombinant vectors useful for transformation of Thraustochytriales microorganisms, as well as a method of transformation of Thraustochytriales microorganisms. The recombinant nucleic acid molecules of the present invention can be used for the expression of foreign nucleic acids in a Thraustochytriales microorganism as well as for the deletion, mutation, or inactivation of genes in Thraustochytriales microorganisms.

Disclosed are the complete polyunsaturated fatty acid (PUFA) polyketide synthase (PKS) systems from the bacterial microorganisms Shewanella japonica and Shewanella olleyana, and biologically active fragments and homologues thereof. More particularly, this invention relates to nucleic acids encoding such PUFA PKS systems, to proteins and domains thereof that comprise such PUFA PKS systems, to genetically modified organisms (plants and microorganisms) comprising such PUFA PKS systems, and to methods of making and using the PUFA PKS systems disclosed herein. This invention also relates to genetically modified plants and microorganisms and methods to efficiently produce lipids enriched in various polyunsaturated fatty acids (PUFAs) as well as other bioactive molecules by manipulation of a PUFA polyketide synthase (PKS) system.

Disclosed are novel acyl-CoA synthetases and novel acyltransferases, nucleic acid molecules encoding the same, recombinant nucleic acid molecules and recombinant host cells comprising such nucleic acid molecules, genetically modified organisms (microorganisms and plants) comprising the same, and methods of making and using the same. Also disclosed are genetically modified organisms (e.g., plants, microorganisms) that have been genetically modified to express a PKS-like system for the production of PUFAs (a PUFA PKS system or PUFA synthase), wherein the organisms have been modified to express an acyl-CoA synthetase, to express an acyl transferase, to delete or inactivate a fatty acid synthase (FAS) expressed by the organism, to reduce competition for malonyl CoA with the PUFA synthase or to increase the level of malonyl CoA in the organism, and in one aspect, to inhibit KASII or KASIII. Additional modifications, and methods to make and use such organisms, in addition to PUFAs and oils obtained from such organisms, are disclosed, alone with various products including such PUFAs and oils.

Described are enzyme systems specific for acetone and methods of using these enzyme systems to detect acetone in biological or environmental samples. Biosensors containing these enzyme systems are disclosed, in which detection of acetone may be achieved by linking electrochemical, photometric, or other detection means to one or more acetone-specific enzyme reactions or pathways. Methods of using such acetone-specific biosensors include subject management of weight loss, disease detection, and bioavailability monitoring of therapeutics.

The present invention relates to kits and methods for efficiently generating 5′ capped RNA having a modified cap nucleotide and for use of such modified-nucleotide-capped RNA molecules. The invention is used to obtain novel compositions of such modified-nucleotide-capped RNA molecules. In particular, the present invention provides kits and methods for capping RNA using a modified cap nucleotide and a capping enzyme system, such as poxvirus capping enzyme. The present invention finds use for in vitro production of 5′-capped RNA having a modified cap nucleotide and for in vitro or in vivo production of polypeptides by in vitro or in vivo translation of such modified-nucleotide-capped RNA for a variety of research, therapeutic, and commercial applications. The invention also provides methods and kits for capturing or isolating uncapped RNA comprising primary RNA transcripts or RNA having a 5′-diphosphate, such as RNA synthesized in vitro or obtained from a biological source, including prokaryotic mRNA that is in a mixture with other prokaryotic and / or eukaryotic nucleic acids. The method for capturing modified-nucleotide-capped RNA also provides methods and kits for obtaining only type-specific or condition-specific modified-nucleotide-capped RNA by cap-dependent subtraction of that portion of the captured modified-nucleotide-capped RNA in cells of one type or condition that is the same as RNA in cells of another type or condition. The invention further provides methods and kits for using a capping enzyme system and modified cap nucleotides for labeling uncapped RNA comprising primary RNA transcripts or RNA having a 5′-diphosphate with detectable dye or enzyme moieties.

The invention generally relates to polyunsaturated fatty acid (PUFA) polyketide synthase (PKS) systems, to homologues thereof, to isolated nucleic acid molecules and recombinant nucleic acid molecules encoding biologically active domains of such a PUFA PKS system, to genetically modified organisms comprising PUFA PKS systems, to methods of making and using such systems for the production of bioactive molecules of interest, and to novel methods for identifying new bacterial and non-bacterial microorganisms having such a PUFA PKS system.

The invention generally relates to polyunsaturated fatty acid (PUFA) polyketide synthase (PKS) systems, to homologues thereof, to isolated nucleic acid molecules and recombinant nucleic acid molecules encoding biologically active domains of such a PUFA PKS system, to genetically modified organisms comprising PUFA PKS systems, to methods of making and using such systems for the production of bioactive molecules of interest, and to novel methods for identifying new bacterial and non-bacterial microorganisms having such a PUFA PKS system.

The invention generally relates to polyunsaturated fatty acid (PUFA) polyketide synthase (PKS) systems, to homologues thereof, to isolated nucleic acid molecules and recombinant nucleic acid molecules encoding biologically active domains of such a PUFA PKS system, to genetically modified organisms comprising PUFA PKS systems, to methods of making and using such systems for the production of bioactive molecules of interest, and to novel methods for identifying new bacterial and non-bacterial microorganisms having such a PUFA PKS system.

The invention relates to a rapid construction method of a conditional gene knockout animal model, which is implemented by using a CRISPR / Cas9 technology. The specific method can be implemented as follows: designing a gRNA target spot sequence, for a to-be-knocked-out gene of an animal, of a CRISPR / Cas9 system, designing a corresponding promoter, constructing a plasmid, thereby implementing conditional gene knockout. According to the invention, the rapid, efficient, simple, feasible, economic, efficient, and wide-applicable-scope construction of a conditional gene knockout animal model can be realized, and the defects existing in traditional methods (specific recombination enzyme system Cre-LoxP) can be overcome.

A process for production of biofuels from algae can include cultivating an oil-producing algae, extracting the algal oil, and converting the algal oil to form biodiesel. Extracting the algal oil from the oil-producing algae can include biologically rupturing cell wall and oil vesicles of the oil-producing algae using at least one enzyme such as a cellulose or glycoproteinase, a structured enzyme system such as a cellulosome, a virus, or combination of these materials.

The present invention provides a cordyceps sinensis enzyme and a preparation method thereof. The enzyme is prepared by fermenting the following ingredients in parts by weight: fruits and vegetables 55-70 parts, fungi 8-12 parts, cordyceps sinensis 1-2 parts and sugar 15-20 parts with the addition of probiotic 0.2-0.8 part. The preparation method comprises the following steps: preparing cordyceps sinensis sporoderm-broken powder, preparing primary enzyme solution, fermenting the powder and the solution for preparing the cordyceps sinensis enzyme, etc. The enzyme uses ultramicro crushing technology to crush the cordyceps sinensis, and low temperature or room temperature sporoderm-breaking technology to conduct sporoderm-breaking on the cordyceps sinensis so that the nutrition loss of the cordyceps sinensis is prevented and the absorption rate of the cordyceps sinensis is improved; the enzyme utilizes rich enzyme systems of enzymes to conduct additional sporoderm-breaking on the sporoderm-broken powder, which facilitates the release and homogenization of active ingredients in the cordyceps sinensis, and improves the effect of drugs. The prepared enzyme contains proteins, amino acids, vitamins, enzyme substances, etc. essential for human bodies, effectively accumulates functional components of the cordyceps sinensis, and effectively improves various health-care effects of the enzymes.

The invention relates to modification of a cell penetrating peptide for realizing a low-toxicity administration system with a positive targeting selecting function. A shielding peptide, an enzymolysis substrate peptide and a cell-penetrating peptide are connected in sequence, so that an activatable cell penetrating peptide is formed; and a medicament and / or a tracer and / or a medicament carrier is connected or embedded or adsorbed to the cell penetrating peptide, so that an administration system is constructed. According to a shielding peptide sequence, positive charges carried on the surface of the administration system can be reduced or completely neutralized, the cell penetrating capability of the cell penetrating peptide is shielded, and the toxicity of the administration system on normal cells of an organism is lowered; and an enzymolysis substrate peptide sequence can be identified by enzyme systems secreted specifically by different pathological change tissue cells and fractured by enzyme hydrolysis, so that a cell penetrating peptide is released and is used for carrying a medicament and / or a medicament carrier through a cell membrane, and the medicament enters cells and is brought into play. The invention aims to actively convey an antitumor medicament to tumor tissues in a targeted way and make the antitumor medicament enter tumor cells to a larger extent by using the administration system which can be used for activating a cell penetrating function, so that the toxicity at a non-tumor position is lowered while the antitumor effect of the medicament is enhanced.

Disclosed are the complete polyunsaturated fatty acid (PUFA) polyketide synthase (PKS) systems from Schizochytrium, and biologically active fragments and homologues thereof. More particularly, this invention relates to nucleic acids encoding such PUFA PKS systems, to proteins and domains thereof that comprise such PUFA PKS systems, to genetically modified organisms (plants and microorganisms) comprising such PUFA PKS systems, and to methods of making and using the PUFA PKS systems disclosed herein. This invention also relates to genetically modified plants and microorganisms and methods to efficiently produce lipids enriched in various polyunsaturated fatty acids (PUFAs) as well as other bioactive molecules by manipulation of a PUFA polyketide synthase (PKS) system.

The invention relates to a compound enzyme preparation for fermentation of pu'er tea, which is formed by compounding 10% to 20% of cellulase, 10% to 20% of pectinase, 5% to 15% of polyphenol oxidase, 5% to 10% of glucose oxidase, 5% to 10% glucoamylase, 5% to 10% xylanase, 5% to 10% of beta-glucanase, 5% to 10% of beta-mannase, 5% to 10% of tannase, 5% to 10% of acidic protease, 5% to 10% of lipase, 1% to 5% of alpha-amylase and 1% to 5% of phytase. By the aid of coordination of the enzyme system, polysaccharide and other substances in tea including cellulose and hemicellulose can be effectively decomposed, so that various physiochemical substances in cells can be dissolved. Meanwhile, oxidation and condensation of tea polyphenol, decomposition of protein, amino acid and carbonhydrate, a series of reactions of various products including polymerization and condensation and the like are accelerated and promoted.

The invention provides a method for unhairing leather and loosening leather fiber without sodium sulfide and lime in a leather production process and the application of the method. The method is characterized in that a method for combining unhairing by non-sulfur (sodium sulfide) depilatory under the alkaline condition and enzyme fiber loosening under the under the non-lime (lime) alkaline swelling condition are adopted, the enzyme unhearing and the enzyme fiber loosening take protease, lipase, amylase and glucoamylase as a compound enzyme system. The method achieves the effects for unhairing and loosening the leather fiber through adopting the method for combining compound enzyme water immersion, compound enzyme unhairing, unhairing with sodium sulfide depilatory, expansion regulator-sodium hydroxide expansion and the enzyme unhairing under the alkaline condition and eliminates the pollution which is brought by the sodium sulfide and the lime in animal unhairing or leather fiber loosening procedures in the leather production process. The method of the invention is suitable for unhairing and leather fiber dispersed processing of various animal leather of leather with various usages.

The invention provides high enzyme loading nanofibers and processes utilized in their fabrication, the nanofibers suitable for use as a new class of highly sensitive and stable biosensors capable of monitoring glucose at low levels. The biosensors, comprising nanofiber enzyme materials fabricated from organic solvent-based polymer-enzyme systems, can be used effectively in non-invasive transdermal biosensing applications.

The invention provides a real-time fluorescence quantitative PCR (Polymerase Chain Reaction) kit for detecting the expression level of HER2 genes and relates to a PCR kit. The real-time fluorescence quantitative PCR kit comprises PCR reaction liquid of the HER2 genes, PCR reaction liquid of ACTB genes, a Taq enzyme system, a control product and a packaging object; and the adopted primer is an annular primer, 3-8 self-designed basic groups are at the 5' end, and can be combined with the sequence at the 3' end under proper conditions so as to form double chains. The real-time fluorescence quantitative PCR kit has the advantages that the non-specific amplification products especially primer dimer generated by nonspecific amplification products especially the primer can be effectively prevented from being formed, the specificity is increased; and a relative-quantitative RT-PCR method is utilized for detecting the expression level of the HER2 genes of a patient with the breast cancer, adopts a 2-delta deltaCt value method for quantifying the detected result, and can be used for diagnosis of early stage and transferring of the breast cancer and assisting multiple fields such as clinicalmedicine selection and prognosis.

The present invention relates to cell wall degradative systems, in particular to systems containing enzymes that bind to and / or depolymerize cellulose. These systems have a number of applications. Some embodiments relate to a method of producing ethanol using the cell wall degradative systems of the present invention.

This invention relates to the biocatalysts for the efficient production of succinic acid and / or other products from renewable biological feedstocks. The biocatalysts have a very high efficiency for the growth-coupled production of succinic acid and / or other products from carbohydrate feed stocks as a result of both genetic manipulations and metabolic evolution. More specifically, certain biocatalysts of the present invention produce succinic acid at high titers and yield in mineral salts media during simple pH-controlled, batch fermentation without the addition of any exogenous genetic material. The genetic manipulations of the present invention are concerned with the energy-conserving strategies coupled with the elimination of alternative routes for NADH oxidation other than the routes for succinic acid production. The biocatalysts contain glucose-repressed gluconeogenic phosphoenol pyruvate carboxykinase (pck) depressed by genetic modifications and a genetically-inactivated phosphotransferase system. In terms of succinic acid production efficiency, the biocatalysts of the present invention are functionally equivalent to succinate producing rumen bacteria such as Actinobacillus succinogens and Mannheimia succiniproducens with one difference that the biocatalysts are able to achieve this high level of succinic acid production in a minimal salt medium with carbohydrate source as opposed to the requirement for a rich media for succinic acid production by rumen bacteria.

Described are enzyme systems specific for acetone and methods of using these enzyme systems to detect acetone in biological or environmental samples. Biosensors containing these enzyme systems are disclosed, in which detection of acetone may be achieved by linking electrochemical, photometric, or other detection means to one or more acetone-specific enzyme reactions or pathways. Methods of using such acetone-specific biosensors include subject management of weight loss, disease detection, and bioavailability monitoring of therapeutics.

The invention relates to a compound microbial preparation for treating black and odorous rivers through strengthened calcium nitrate and a preparation method thereof. The use amount of calcium nitrate is reduced, and the time for treating the black and odorous rivers is shortened. The compound microbial preparation is prepared from 40-80 parts of thiobacillus denitrificans and thiocapsa roseoppersicina mixed powder, 10-60 parts of composite bacillus subtilis powder and 10-60 parts of yeast and lactic acid bacterium mixed powder. By means of the preparation, sulfide in black and odorous bottom sludge, organic matter and strains suitable for growing in the black and odorous bottom sludge are screened and degraded in a targeted mode; by means of thiobacillus denitrificans with efficient hydrogen sulfide degrading and denitrification capacity, sulfur-oxidizing bacteria of thiocapsa roseoppersicina with efficient hydrogen sulfide and ammoniacal nitrogen degrading capacity, bacilli rich in protease, amylase, cellulose and other enzyme systems, yeast and lactic acid bacteria, a small amount of calcium nitrate and the compound microbial preparation are thrown into the black and odorous rivers so that water quality of the black and odorous rivers can be quickly improved, the black and odorous bottom sludge can be removed quickly, and the thickness and the organic matter content of the bottom sludge can be quickly reduced.

The invention relates to a feed additive, in particular to a prepration method of a compound microbial feed additive, which is used for solving the problems that a variety of feed additives have respective different shortcomings in the actual applications. The preparation method comprises the following steps: preparing selenium yeast, iron yeast and zinc yeast which are rich in trace elements, taking vinegar residue, wheat bran, corn flour, compound Daqu, ammonium sulfate and other auxiliary materials as culture media, adding aspergillus niger, aspergillus oryzae, bacillus subtilis, lactobacillus and yeast, producing a multi-bacterial compound enzyme by the solid-state method, and mixing the functional yeast, phytase and the multi-bacterial compound enzyme for producing a biological feed micro-multi-enzyme which has a large number of live bacteria in beneficial bacterial groups, a complete enzyme system of digestive enzymes and non-digestive enzymes needed by animals and high enzyme activity, and is rich in organic trace elements, vitamins, amino acids and unknown growth-promoting factors with functional nutrition for the animals and people; furthermore, the feed additive has the advantages of advanced process, abundant nutrition, abundant bacterial groups, full enzyme spectrum, high activity, greenness, no pollution and the like.

The invention discloses a gracilaria lemaneiformis agar oligosaccharide and the preparation method and application thereof and relates to an oligosaccharide. The invention provides a gracilaria lemaneiformis agar oligosaccharide, the preparation method of gracilaria lemaneiformis agar oligosaccharide and the application of the gracilaria lemaneiformis agar oligosaccharide in preparation of antioxidant and uvioresistant health care products and cosmetics. Pacific heating color bacillus H2 and gracilaria lemaneiformis are co-cultivated and the gracilaria lemaneiformis is directly degraded by the enzyme system which is generated by bacterial strain to obtain the gracilaria lemaneiformis agar oligosaccharide of which the degree of polymerization is 4-8. The gracilaria lemaneiformis agar oligosaccharide has the physiological activities of antioxidation, absorbing ultraviolet rays and the like. In preparation, the bacterial strain is activated by an activation medium plate and inoculated in a seed medium; fermentation broth is obtained by shake cultivation and inoculated in a saccharide generating medium; after shaking fermental cultivation and centrifugalization, supernate is collected; the supernate is successively filtered by a membrane filtration devices with a 0.45mu m filter membrane, a 0.22mu m filter membrane, a 10000-50000D ultrafiltration membrane and a 300-600D ultrafiltration membrane, and the percolate is the gracilaria lemaneiformis agar oligosaccharide.

The invention provides a ternary compound inoculant for a fermentation bed for pigs. The ternary compound inoculant is prepared from a compound inoculant I, a compound inoculant II and a compound inoculant III, wherein the compound inoculant I is a starting inoculant and consists of trichoderma koningii, bacillus licheniformis and bacillus amyloliquefaciens; the compound inoculant II is a maintaining inoculant and consists of azotobacter chroococcum, enterococcus faecalis, bacillus laterosporus, bacillus amyloliquefaciens and bacillus subtilis; the compound inoculant III is a stacking inoculant and consists of aspergillus oryzae, streptomycete, azotobacter chroococcum, trichoderma koningii and bacillus licheniformis. The ternary compound inoculant provided by the invention is an efficient conversion flora system with complementary function and complementary enzyme system; the compound inoculant I is fermented to produce heat before entering; the compound inoculant II is subjected to biological deodorization, bacteria inhibition and waste transformation in cultivation; the compound inoculant III is decayed at high temperature after being discharged; nutrients are preserved in situ. The ternary compound inoculant system is collaboratively progressive, a continuous circulating fermentation process for cultivation of the fermentation bed is achieved, and healthy and clean production of pigs is facilitated.

The invention belongs to the field of food processing and particularly relates to a method for adding medical stone for fermentation in production of white liquor, which comprises the steps of preparing raw materials, steaming grains, fermenting and discharging from kiln and is characterized in that the medical stone is added in the fermentation process of white liquor. The method has the advantages that: by adding the medical stone in the fermentation process of the white liquor, the growth of a zymophyte strain is promoted, the combination structure of an enzyme system in a fermentation process is optimized, fermentation substrate is well transformed, the materials can be well combined, the quantity and types of the products are increased, the complex property of the quality of the liquor is increased, and the quality and yield of the liquor are increased. According to sensory evaluation, the produced raw wine is clear and transparent, has strong grain fragrance, and offers a mellow, soft, sweet and smooth mouthfeel.

Disclosed are novel acyl-CoA synthetases and novel acyltransferases, nucleic acid molecules encoding the same, recombinant nucleic acid molecules and recombinant host cells comprising such nucleic acid molecules, genetically modified organisms (microorganisms and plants) comprising the same, and methods of making and using the same. Also disclosed are genetically modified organisms (e.g., plants, microorganisms) that have been genetically modified to express a PKS-like system for the production of PUFAs (a PUFA PKS system or PUFA synthase), wherein the organisms have been modified to express an acyl-CoA synthetase, to express an acyl transferase, to delete or inactivate a fatty acid synthase (FAS) expressed by the organism, to reduce competition for malonyl CoA with the PUFA synthase or toincrease the level of malonyl CoA in the organism, and in one aspect, to inhibit KASII or KASIII. Additional modifications, and methods to make and use such organisms, in addition to PUFAs and oils o btained from such organisms, are disclosed, alone with various products including such PUFAs and oils.

The invention provides a preparation method for a degummed kenaf fiber. According to the method, vacuum technology, an enzyme system and ultrasonic technology are combined together for degumming of kenaf bast fibers. The method comprises the following steps: carrying out degumming on a kenaf fiber by using a mixed enzyme system, allowing enzyme liquid to fully penetrate into the fiber by using vacuum negative pressure technology and allowing gum macro-molecule insoluble in water to fracture and a part of lignin to be decomposed at the same time; and removing gum strongly bonding with the fiber by using low-frequency ultrasonic waves and finally, removing residual gum in tiny parts like micropores and slits by using high-frequency ultrasonic waves. The method overcomes the problems of a great amount of residual gum, rough fiber surface and the like in conventional degumming with a single biological enzyme, improves the quality of the degummed kenaf fiber and reduces the usage amount of the enzyme and chemicals.