43 results about "Nocardia sp" patented technology

The invention provides a microbial composition comprising acetobacter aceti, beauveria bassiana, azospirllum brasilense, nocardia cellulans, bacillus mucilaginosus, metarhizium anisopliae, trichoderma aureoviride and the like. The microbial composition can be stably combined in a microbial agent, is used for improving soil/land and especially can be used for effectively improving soil polluted by heavy metals.

The invention provides a microbial composition comprising acetobacter aceti, beauveria bassiana, azospirllum brasilense, nocardia cellulans, bacillus mucilaginosus, metarhizium anisopliae, trichoderma aureoviride and the like. The microbial composition can be stably combined in a microbial agent, can survive for a long term in a plurality of improved soil to play a role, is good in adaptation of improving soil/land and especially can be used for effectively improving a plurality of soil, such as secondary salinization land, desertification soil.

The invention provides modification and application of nitrile hydratase amino acid motif, and belongs to the technical field of bioengineering. According to the invention, nitrile hydratase derived from pseudonocardia thermophila is modified, the NO.46 site on a beta subunit and the NO.6 site and NO.126 site on an alpha subunit of a wild type are mutated respectively, and the specific enzyme activity of a constructed mutant is remarkably improved and can be improved by 1-5 times compared with that of the wild type. Moreover, the substrate spectrum is also broadened, the mutant has a very goodcatalytic effect on isobutyronitrile, n-valeronitrile, acrylonitrile, nicotinonitrile, 2-cyanopyrazine, benzonitrile, cinnamonitrile, naphthonitrile and the like, and the catalytic performance on corresponding substrates is also remarkably improved. Therefore, the obtained nitrile hydratase mutant can be suitable for more production scenes, and the production efficiency is improved.

The invention provides a sulfonamide antibiotic synergistically degraded bacteria and an application thereof. The sulfonamide antibiotic synergistically degraded bacteria comprise arthrobacterium P27and nocardioides N27, wherein the arthrobacterium P27 is preserved in China General Microbiological Culture Collection Center on December 03, 2019, and the preservation number is CGMCC No. 19070; andthe nocardioides N27 is preserved in the China General Microbiological Culture Collection Center on December 03, 2019, and the preservation is CGMCC NO. 19071. According to the technical scheme, compounding of the two strains of bacteria can synergistically complete degradation of sulfamethoxazole and an azacyclo product 3-amino-5-methylisoxazole; and in addition, the strain P27 can degrade one side of benzene rings of various sulfonamide antibiotics, the degradation substrate spectrum is wide, and a new idea and a new strain resource are provided for deep removal of the sulfonamide antibiotics.

The invention discloses a Nocardia sp. WY1202 and a production method for (R)-3-quinuclidinol through fermentation of quininone by using Nocardia sp. WY1202. According to the invention, quininone hydrochloride is used as a sole carbon source for the strain of Nocardia sp. WY1202 which is screened from soil in a farm orchard in Xiqing District, Tianjin City, China, and is preserved in China General Microbiological Collection Center with an accession number of CGMCC No. 5095. The production method comprises the following steps: with the Nocardia sp.WY1202 as a strain, carrying out primary seed culture and secondary fermentation amplification culture; taking a fermentation culture solution, collecting thalli through centrifugation, washing the thalli and re-suspending the thalli in a buffer solution; adding the substrate quininone hydrochloride, adding glucose and carrying out centrifugation after a reaction for 24 to 48 h; adjusting the pH value of a supernatant until the supernatant is alkaline; drying the supernatant through pressure reduced spinning; subjecting an obtained residue to solid-liquid extraction with an organic solvent; and drying an obtained filtrate through spinning so as to obtain (R)-(-)-3-quinuclidinol. According to the invention, the product (R)-(-)-3-quinuclidinol has a yield of 95%, a purity of 96% and an e.e value of more than 95%; the production method is simple to operate, has low energy consumption, accords with requirements for green chemistry and is applicable to large-scale bioconversion production for (R)-(-)-3-quinuclidinol.

The invention is applicable to the technical field of genetic engineering and provides a nocardia seriolae attenuated strain and a preparation method and application thereof. The nocardia seriolae attenuated strain is a nocardia seriolae strain containing alanine dehydrogenase gene deletion. The preparation method comprises the following steps of: connecting an upstream fragment and a downstream fragment of an alanine dehydrogenase gene into a vector to obtain a recombinant vector; taking a nocardia seriolae wild strain to prepare nocardia seriolae competent cells; performing electrotransformation on the nocardia seriolae competent cells by utilizing the recombinant vector to obtain electrotransformation bacterial liquid; and culturing and screening the electrotransformation bacterial liquid to obtain the nocardia seriolae attenuated strain. The nocardia seriolae attenuated strain provided by the invention can be used for preventing nocardiosis infection; after the alanine dehydrogenase gene is deleted by a gene knockout method, the pathogenicity of bacteria can be effectively reduced, but relatively good immunogenicity is still retained.

The invention belongs to the field of oily sewage treatment, and particularly relates to a bacterial strain for producing a biological flocculant and the biological flocculant produced by using the bacterial strain. The bacterial strain of the biological flocculant produced by the invention is named as Nocardia rhodochroms, and the preservation number is CGMCC NO.19718. The strain is preserved inChina General Microbiological Culture Collection Center on April 24 in 2020. The strain is stable in performance, and the biological flocculant for treating oily sewage can be prepared in the fermentation process. Therefore, the oily sewage can be well treated, and the treatment effect is superior to that of the existing common Nocardia rhodochroms. Moreover, the biological flocculant prepared from the strain does not cause harm to the environment, and the technical problems that an existing treatment method easily causes secondary pollution and has residual toxicity are solved.

The invention relates to a preparation method of 1,25-dihydroxyl vitamin D3, in particular to a method for preparing 1,25-dihydroxyl vitamin D3 by microbial transformation. According to the method, 1alpha-hydroxyvitamin D3 is subjected to 25-site hydroxyl transformation through nocardia sp.fpsw2013097 collected in a unit specified by the State Intellectual Property Office with the collection number CGMCC No.14165. A transformation method comprises the following specific steps: inoculating a prepared spore suspension into a culture medium, and culturing on a shaking table at the rotating speedof 200 to 250rpm and at the temperature of 24 to 32 DEG C for 2 to 5 days; adding a mixture prepared by mixing dextrin, water, glycerinum, 1alpha-hydroxyvitamin D3, a surfactant and an organic solventinto the culture medium, and continually culturing for 3 to 7 days; filtering to obtain a finished product. The method has the advantages of realization of direct hydroxylation at the 25-bite of the1alpha-hydroxyvitamin D3, high yield, simple production steps, low cost and the like.

The invention relates to application of a Nocardia rubra cell wall skeleton as a neutrophil modulator. The present application provides a neutrophil modulator, which comprises a component derived from the cell wall of Nocardia rubra, and which can modulate the chemotactic function, phagocytosis function, and bactericidal function (reactive oxygen species (ROS) generation, degranulation formation) of neutrophil. The neutrophil regulator disclosed by the invention can also improve the local immune microenvironment of a chronic infection wound.

The invention relates to autotrophic pseudonocardia and application thereof, and belongs to the technical field of microorganisms. The pseudonocardia autotrophicus can be used for preparing calcifediol and/or calcitriol, compared with an original strain, the yield is remarkably improved.

The invention discloses a strain of Nocardia anfenacea bacteriophage P69 and application thereof, and belongs to the technical field of biology. The preservation number of the nocardia orientalis bacteriophage P69 disclosed by the invention is CGMCC (China General Microbiological Culture Collection Center) No.23088. The nocardia orientalis bacteriophage P69 provides a selectable basic material for prevention and control of a sludge foaming event caused by nocardia orientalis, and enriches a bacteriophage seed bank; the functional gene and protein of the bacteriophage P69 are further deeply excavated through separation identification and whole genome sequencing of the bacteriophage P69, and one or more enzymes and the like with a splitting effect on Nocardia soufeniana are provided for bacteriophage treatment and biological prevention and control, so that the host spectrum is expanded, and the application universality and effectiveness of the bacteriophage are improved; the bacteriophage P69 can be used for rapidly and efficiently cracking Nocardia soufeniformis and can be used for sludge foaming events caused by excessive propagation of Nocardia in a sewage treatment system.

The invention relates to a PCR detection method of pathogenic bacteria of fish sarcoidosis, comprising the following steps of: extracting genomic DNA of Aeromonas hydrophila, Photobacterium damselae subsp. piscicida, Nocardia asteroids, Aeromonas schubertii, Nocardia seriolae and Nocardia salmonicida; carrying out primer design on the genomic DNA of pathogenic bacteria; and carrying out amplification and detection on the genomic DNA of Aeromonas hydrophila, Photobacterium damselae subsp. piscicida, Nocardia asteroids, Aeromonas schubertii, Nocardia seriolae and Nocardia salmonicida. Various pathogenic bacteria of sarcoidosis can be detected by the method, and the method has high specificity and sensitivity.