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30 results about "Ornithine-Oxo-Acid Transaminase" patented technology

A pyridoxal phosphate enzyme that catalyzes the formation of glutamate gamma-semialdehyde and an L-amino acid from L-ornithine and a 2-keto-acid. EC 2.6.1.13.

Method for preparing L-ornithine-L aspartate

The invention discloses a method for preparing L-ornithine-L aspartate, which has the characteristics of taking L-ornithine acetate as a raw material and reacting the L-ornithine acetate with L-aspartate in water. The method particularly comprises the following steps of: dissolving the L-ornithine acetate in the water; adding the L-aspartate into the solution; regulating a pH value of the solution to be between 6 and 9 with ammonia; adding activated carbon for de-coloring and filtering; adding a reasonable amount of ethanol or methanol into a filtrate for stirring and crystallizing; and filtering and drying the filtrate to obtain the finished product. The method has the advantages of overcoming the defects existing in the prior art by using the property that ammonium acetate is easy to dissolve in the aqueous solution of alcohol, and also has the advantages of high yield, moderate reaction conditions, simple operation, stable product quality and the like.
Owner:福安药业集团重庆博圣制药有限公司

Bifidobacteria viable bacteria preparation and special-purpose protective agent thereof

ActiveCN101016527ASolve the problem of difficult storage at room temperatureSimple methodBacteriaVitamin CActive agent
The invention discloses a preparing method of bifidobacteria bacterial active agent and single-purpose protecting agent, which is characterized by the following: allocating 0.01-5.0 wt glycerin, 0.1-6.0 wt polyvinyl pyrrolidon, 0.1-5.0 carbowax, 1.0-10.0 wt skimmed milk powder, 0.5-15.0 wt mycose, 0.1-5.0 wt glutavene, 0.1-5.0 wt L-aspartic acid, 0.1-5.0 wt vitamin C sodium and 0.1-5.0 wt ornithine hydrochlorate. This invention solves the problem of preservation difficulty at normal temperature with conventional method.
Owner:LIVZON PHARM GRP INC

Method for producing L-ornithine by microorganism fermentation

The invention provides a method for producing L-ornithine by microbial fermentation, namely, using Corynebacterium glutamate to obtain the strains of CS-189(cit<(-)>+SG<r>) by chemical treatment, and obtain the L-ornithine hydrochloride by fermentation, culture solution micro-filtration by a ceramic membrane, ion exchange resin and extraction by a hydrothermal crystallization method with decompression concentration. The strains used in the method are auxotrophy resistant to sulfaguanidine, which significantly enhances acid yield by fermentation. Meanwhile, aiming at the problem that the solubility of the L-ornithine hydrochloride in water is extremely difficult, the hydrothermal crystallization method is adopted to obtain better extraction rate under the condition that flammable and explosive alcohol is not used. The method simplifies processes and reduces extraction cost.
Owner:上海聚瑞生物技术有限公司

Signal peptide and application thereof in synthesis of l-arginine from conjac powder and value enhancement of conjac powder

ActiveUS20180258385A1Promote cell growthEfficient productionBacteriaPeptidesΒ mannanaseL-ornithine L-aspartate
The present invention relates to application of a novel signal peptide in L-arginine and its derivatives production from konjac powder, which belongs to the field of gene engineering, enzyme engineering and metabolism engineering. The present invention fused the signal peptide set forth in SEQ ID NO.1 with the β-mannanase of Bacillus subtilis CCTCC M 209200, and expressed the fused gene in the strain with high L-arginine yield. The recombinant strain Corynebacterium crenatum CGMCC 0890 / p MSPman had advantages on utilizing cheaper konjac powder as substrate, and after fermenting for 96 hours in a 5 L bioreactor, the L-arginine yield reached 45 g / L. Another two recombinant strains were constructed based on Corynebacterium crenatum CGMCC 0890 / pMSPman, and after fermenting for 96 hours in a 5 L bioreactor, the L-ornithine yield and L-citrulline reached 23.5 g / L and 26.3 g / L respectively.
Owner:JIANGNAN UNIV

Method for synthesizing natural product (+/-)-Pestaloxazine A from ornithine

The invention relates to a method for synthesizing a natural product (+ / -)-Pestaloxazine A from ornithine. The method comprises the steps of carrying out series reaction such as condensation, oxidation and cyclization on the protected ornithine to obtain a symmetric dioxazine alkane spiropiperazine compound A; and then carrying out condensation reaction on the symmetric dioxazine alkane spiropiperazine compound A and a side chain compound B to prepare the natural product (+ / -)-pestaloxazine A.
Owner:YANGZHOU BLUE BIOMEDICAL TECH CO LTD

Chemical-enzyme method for preparing D-basic amino acid hydrochloride

InactiveCN102392061AGuaranteed high optical activitySimpler than ion exchange separationOrganic compound preparationAmino-carboxyl compound preparationPenicillinPhenylacetic acid
The invention provides a chemical-enzyme method for preparing D-basic amino acid hydrochloride. The method comprises the following steps of: derivatizing DL-basic amino acid serving as a raw material to obtain DL-N-diphenyl acetyl basic amino acid by utilizing an acylating agent, hydrolyzing the DL-N-diphenyl acetyl basic amino acid by using immobilized penicillin acylase as a biocatalyst through non-stereo selectivity and enantioselectivity to obtain L-basic amino acid, phenylacetic acid and D-alpha-N-phenylacetyl basic amino acid; and performing acidolysis on the D-alpha-N-phenylacetyl basic amino acid to obtain phenylacetic acid and D-basic amino acid dihydrochloride, and performing treatment of epoxypropane to obtain the D-basic amino acid hydrochloride. The D-lysine hydrochloride and D-ornithine hydrochloride which are prepared by the method have the yield of more than 40 percent, and ee is more than 99 percent. The method has the characteristics of high yield and optical purity, simple process and the like, and is suitable for the large-scale production of the D-basic amino acid hydrochloride.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Flavour additives

The present invention relates to the use of a first amino acid selected from the group consisting of glycine, alanine, cysteine, histidine, leucine, methionine, phenylalanine, serine, tryptophan and tyrosine or a mixture of two or more thereof; a second amino acid selected from the group consisting of aspartic acid, cystine, glutamic acid, glutamine, isoleucine, lysine, aspartic acid, ornithine, threonine, valine, proline and hydroxyproline or a mixture of two or more thereof and one or more furanones for increasing the palatability of a foodstuff to a companion animal. The invention also relates to a pet foodstuff or supplement comprising a first amino acid selected from the group consisting of glycine, alanine, cysteine, histidine, leucine, methionine, phenylalanine, serine, tryptophan and tyrosine or a mixture of two or more thereof; a second amino acid selected from the group consisting of aspartic acid, cystine, glutamic acid, glutamine, isoleucine, lysine, aspartic acid, ornithine, threonine, valine, proline and hydroxyproline or a mixture of two or more thereof and one or more furanones, and also to a method of increasing the palatability of a foodstuff to a companion animal.
Owner:MARS INC

2-difluoro substituted 4-aminocyclopentanecarboxylic acids as inhibitors of gamma-aminobutyric acid aminotransferase and human ornithine aminotransferase

Disclosed are enantiomerically pure cyclopentane-based compounds that are prepared by a multiple-step synthesis process. The disclosed compounds have been designed to inhibit gamma-aminobutyric acid-amino transferase (GABA-AT) activity and ornithine aminotransferase (OAT) activity. Some of the enantiomerically pure compounds inhibit OAT activity more potently than the racemic compound. The disclosed compounds may be used to selectively inhibit OAT activity, for example, to treat hepatocellular carcinoma and / or used to selected inhibit GABA-AT activity, for example, to treat neurological diseases and disorders.
Owner:NORTHWESTERN UNIV

Genetically engineered strain for producing L-citrulline and application of genetically engineered strain

The invention provides a genetically engineered strain CIT 4 for efficiently and stably producing Lcitrulline, which takes Escherichia coli as a host, firstly, activity of arginine succinate synthaseis disabled from the host so as to prevent the Lcitrulline from being degraded into arginine succinic acid; a gene argG for encoding escherichia coli arginine succinate synthase being integrated on ahost genome, and expression regulation being carried out by a tryptophan promoter Ptrp; the host is also enabled to delete activity of the acetylornithine deacetylase; a gene argJ of corynebacterium glutamicum coded glutamate acetyltransferase is integrated on a host genome so that the metabolic flow in the process of synthesizing acetylglutamic acid from glutamic acid is enhanced; and genes PyrAAand PyrAB of two subunits of the carbamyl phosphate synthase encoded by the bacillus subtilis mutant strain A260 are also integrated on a host genome so that the feedback inhibition of arginine on the carbamyl phosphate synthase is relieved, and the supply of a precursor substance carbamyl phosphate is improved.
Owner:TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Standard solution for use in analysis of amino acid in plasma

An external standard solution for use in the analysis of amino acid in plasma, containing,(1) at least one amino acid selected from the following components A, at a concentration of 0.0007 M to 0.49 M, and (2) (i) at least one amino acid selected from the following components B, at a concentration of 0.2 to 0.9 times of the lowest-concentration amino acid among the amino acids selected from components A, (ii) at least one amino acid selected from the following components C, at a concentration of 0.1 to 0.4 times of the lowest-concentration amino acid among amino acids selected from the components A, or (iii) at least one amino acid selected from the following components D, at a concentration of 0.05 to 0.2 times of the lowest-concentration amino acid among amino acids selected from the components A;[Components A] valine, glycine, alanine and glutamine[Components B] serine, proline, threonine, taurine, leucine, isoleucine, lysine, histidine, phenylalanine and tyrosine[Components C] asparagine, ornithine, arginine and tryptophan[Components D] glutamic acid, methionine, citrulline and cystine.
Owner:FUJIFILM WAKO PURE CHEM CORP +1

Method for producing L-ornithine by immobilized enzyme method

The invention discloses a method for producing L-ornithine by an immobilized enzyme method, which comprises the following steps: (1) inoculating a seed solution of a human recombinant arginase I producing strain into a fermentation culture medium for fermentation culture, cooling, adding IPTG (isopropyl-beta-d-thiogalactoside) into the system, and performing induced culture for 20-28 hours; (2) carrying out bacterium breaking treatment on the culture solution subjected to induced culture, passing through a ceramic membrane, and collecting filtrate; hanging the filtrate on a column; and (3) enabling a substrate solution containing L-arginine to flow through the nickel column with the hung column for biotransformation, and collecting an effluent transformation solution, so as to produce L-ornithine. According to the invention, a novel human recombinant arginase I producing strain is firstly constructed, and a fermentation process is optimized, so that the yield and enzyme activity of the human recombinant arginase I are improved; then carrying out immobilization treatment on the human recombinant arginase I produced by fermentation by adopting a nickel column hanging column; and then a substrate solution is fed for conversion treatment, so that the L-ornithine is produced by the immobilized enzyme method, and the conversion rate is increased.
Owner:XINTAI JIAHE BIOTECH CO LTD

Method for evaluating temperature and humidity state of environment where nursery pig individuals grow

The invention discloses a method for evaluating the temperature and humidity state of the environment where nursery pig individuals grow. According to the method, biochemical indexes and metabolite concentration in nursery pig blood are quantitatively determined, and the indexes are used for evaluating the temperature and humidity state of the environment where nursery pigs grow. Biochemical indexes and metabolite indexes in blood are as follows: biochemical indexes and metabolite indexes in blood; albumin and glutamic oxalacetic transaminase are added; glutamic-pyruvic transaminase, blood urea nitrogen, creatinine, glucose, triglyceride, total cholesterol, lactic acid, creatine kinase, immunoglobulin M, 3-methyl-L-histidine, ortho-phosphoethanolamine, L-carnosine, L-arginine, ethanolamine, L-glycine, L-aspartic acid, L-sarcosine, beta-alanine, L-ornithine, L-cystine, L-tyrosine, hydroxyproline and alpha-serine.
Owner:INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI

Inhibition of ornithine aminotransferase for the treatment of proliferative disorders

The invention relates to inhibition of ornithine aminotransferase (OAT) for suppression of tumor cells proliferation. More particularly, the invention relates to methods of treatment of proliferative disorders by the selective inhibition of OAT, and further provides the use of OAT inhibitors, specifically, 5-amino-1,3-hexadienyl-carboxylic acid (Gabaculine), and Gabaculine analogue 8, for compositions and methods for the treatment of proliferative disorders such as hepatocellular carcinoma. The invention further provides methods and kits for the diagnosis of a pathologic proliferative disorder in a mammalian subject, based on determining the level of OAT expressed in a biological sample obtained from a subject.
Owner:HADASIT MEDICAL RES SERVICES & DEVMENT +1

Triptolide targeting prodrug and its preparation method and application

The invention relates to the technical field of medicines, in particular to a targeting inducible nitric oxide synthase (iNOS) triptolide prodrug, and a preparation method and application thereof. R1of the triptolide targeting prodrug is L-arginine, L-arginine methyl ester, L-Nomega-NO-arginine, L-N omega-NO-arginine methyl ester, L-proline, L-citrulline, L-thiocitrulline or L-ornithine. The highexpression characteristic of the inducible nitric oxide synthase (iNOS) at an inflammatory site is utilized, and the triptolide is semi-synthesized by an iNOS specific substrate (group) to prepare the prodrug, the toxicity of the triptolide is reduced and the bioavailability are improved through the targeting property of the prodrug, the anti-inflammatory effect is significantly better than thatof the triptolide, and the triptolide can be effectively developed and utilized.
Owner:郭可点

Preparation method of enzymolysis ovalbumin

The invention discloses a preparation method of enzymolysis ovalbumin, and belongs to the technical field of enzymolysis ovalbumin production. The enzymolysis ovalbumin is prepared from the following raw materials in parts by weight: 0.21 to 0.51 part of ornithine, 1.50 to 6.00 parts of lysine, 0.80 to 1.80 parts of histidine, 2.25 to 5.50 parts of arginine, 0.80 to 3.80 parts of threonine, 1.50 to 6.00 parts of serine, 1.41 to 8.24 parts of glutamic acid, 1.00 to 2.58 parts of proline, 0.30 to 2.98 parts of glycine, 1.86 to 5.17 parts of alanine, and the balance of water. The immobilized enzyme can be recycled and can be repeatedly used, so that the investment of the preparation cost is reduced, the immobilized enzyme can be easily and conveniently recycled, time and labor are saved, and the production efficiency of the enzymolysis ovalbumin is guaranteed.
Owner:华亘科技(云南)有限公司

2-difluoro substituted 4-aminocyclopentanecarboxylic acids as inhibitors of gamma-aminobutyric acid aminotransferase and human ornithine aminotransferase

Disclosed are enantiomerically pure cyclopentane-based compounds that are prepared by a multiple-step synthesis process. The disclosed compounds have been designed to inhibit gamma-aminobutyric acid-amino transferase (GABA-AT) activity and ornithine aminotransferase (OAT) activity. Some of the enantiomerically pure compounds inhibit OAT activity more potently than the racemic compound. The disclosed compounds may be used to selectively inhibit OAT activity, for example, to treat hepatocellular carcinoma and / or used to selected inhibit GABA-AT activity, for example, to treat neurological diseases and disorders.
Owner:NORTHWESTERN UNIV

Composition for soothing liver-gallbladder, detoxifying and protecting liver and preparation method thereof

The invention discloses a composition for soothing liver-gallbladder, detoxifying and protecting liver and a preparation method thereof. The composition is prepared from the following raw materials in parts by weight: 12-15 parts of liver extract, 20-22 parts of silybum marianum, 9-11 parts of ornithine and 3-5 parts of turmeric. The composition can significantly improve abnormality of indexes of glutamic oxalacetic transaminase, glutamic-pyruvic transaminase, total protein, albumin, globulin, total bilirubin, direct bilirubin, total bile acid and alkaline phosphatase, repair liver injury, significantly enhance the hangover alleviating ability and improve bad symptoms after drinking or after drunkenness, and the composition is easy to industrially produce and popularize and use.
Owner:杨劲松 +1

Nucleoside derivatives

Novel nucleoside derivatives represented by the following general formula (1): wherein X is(are) the same or different and each represents a pyrimidine or purine base or a derivative thereof, Y-and Y' are the same or different and each represents at least one amino acid or amino acid derivative selected from the group consisting of serine, threonine, ornithine, aspartic acid, glutamic acid, lysine, arginine, cysteine, methionine, delta-hydroxylysine, N-aminoethylglycine, N-aminoethylserine, N-aminoethyllysine, N-aminoethylornithine, N-aminoethylaspartic acid, N-aminoethylglutamic acid, homoglutamic acid, beta-thiocarbonylaspartic acid, gamma-thiocarbonylglutamic acid, and delta-thiocarbonylhomoglutamic acid, R<1 >represents a hydrogen atom or a hydroxyl group, A represents a single bond or a carbonyl or thiocarbonyl group, 1 is an integer of 0 to 5, and n is an integer of 1 to 100.
Owner:JAPAN SCI & TECH CORP

Amino acid composition beneficial to proliferation of lactobacillus acidophilus and application thereof

The invention discloses an amino acid composition beneficial to proliferation of lactobacillus acidophilus and an application thereof, which belong to the technical field of probiotic fermentation. The amino acid composition includes conventional amino acids and / or other amino acids. Other amino acids are the mixture of one or more of phosphoserine, phosphoethanolamine, ethanolamine, taurine, citrulline, homocitrulline , sarcosine, hydroxyproline, alpha-aminobutyric acid, alpha-aminoadipic acid, beta-alanine, beta-aminoisobutyric acid, ornithine, n-valine, alloisoleucine, n-isoleucine, homocysteine, delta-hydroxylysine, 1-methylhistidine, 3-methylhistidine, gamma-aminobutyric acid, carnosine, goose carnosine, cystathionine and arginine succinic acid. The content of viable bacteria in fermentation liquor is greater than 3.0*10<9> cfu / mL, and the content of viable bacteria in freeze-dried bacterial powder is greater than 3.5*10<11> cfu / g. The demand of the existing market for the numberof lactobacillus acidophilus is satisfied.
Owner:郑州和合生物工程技术有限公司

The biosynthesis method of n-methylpyrroline

The invention provides a method for preparing N-methylpyrroline through the combined catalysis of three enzymes, comprising the following steps: using L-ornithine as a substrate, using ornithine decarboxylase EcODC, putrescine-N-methyl It is obtained through joint catalysis of transferase AtPMT and amine oxidase AaDAO3. The above method can also be realized by fermentation of genetically engineered bacteria expressing these three enzymes. The method of the invention is environment-friendly, has warm reaction conditions, and has industrialized development prospects.
Owner:CAS CENT FOR EXCELLENCE IN MOLECULAR PLANT SCI

Echinocandin B synthetic medium and application

The invention discloses an echinocandin B synthetic medium and application of the echinocandin B synthetic medium in preparation of echinocandin B. The echinocandin B synthetic medium is prepared from, by mass concentration, 20-100g / L of methyl oleate, 10-60g / L of starch, 10-30g / L of oleic acid, 10-30g / L of histidine, 5-20g / L of glutamic acid, 2-5g / L of L-threonine, 5-8g / L of L-ornithine hydrochloride, 5-15g / L of potassium nitrate, 5-20g / L of K2HPO4.3H2O, 0.1-1g / L of MgSO4.7H2O, 0.1-0.5 g / L of MnSO4.H2O, 0.01-0.1g / L of FeSO4.7H2O, 0.1-0.5g / L of CaCl2, and 0.5-1g / L of CuSO4.5H2O, wherein water serves as a solvent, and pH is 6.5-7.0. The yield of echinocandin B reaches 1950mg / L.
Owner:ZHEJIANG UNIV OF TECH
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