158 results about "Bacterial host" patented technology

Disclosed are methods of producing eukaryotic disulfide bond-containing polypeptides in bacterial hosts, and compositions resulting therefrom. Co-expression of a eukaryotic foldase and a disulfide bond-containing polypeptide in a bacterial host cell is demonstrated. In particular embodiments, the methods have been used to produce mammalian pancreatic trypsin inhibitor and tissue plasminogen activator (tPA) in soluble, biologically-active forms, which are isolatable from the bacterial periplasm. Also disclosed are expression systems, recombinant vectors, and transformed host cells.

Compositions and methods for conferring pesticidal activity to bacteria, plants, plant cells, tissues and seeds are provided. Compositions comprising a coding sequence for pesticidal polypeptides are provided. The coding sequences can be used in DNA constructs or expression cassettes for transformation and expression in plants and bacteria. Compositions also comprise transformed bacteria, plants, plant cells, tissues, and seeds. In particular, isolated pesticidal nucleic acid molecules are provided. Additionally, amino acid sequences corresponding to the polynucleotides are encompassed. In particular, the present invention provides for isolated nucleic acid molecules comprising nucleotide sequences encoding the amino acid sequence shown in SEQ ID NO:5, 2, or 10, the nucleotide sequence set forth in SEQ ID NO:4, 1, 3, 4, 6, 9, or 11, or the nucleotide sequence deposited in a bacterial host as Accession No. B-50045, as well as variants and fragments thereof.

Compositions and methods for conferring pesticidal activity to bacteria, plants, plant cells, tissues and seeds are provided. Compositions comprising a coding sequence for pesticidal polypeptides are provided. The coding sequences can be used in DNA constructs or expression cassettes for transformation and expression in plants and bacteria. Compositions also comprise transformed bacteria, plants, plant cells, tissues, and seeds. In particular, isolated pesticidal nucleic acid molecules are provided. Additionally, amino acid sequences corresponding to the polynucleotides are encompassed. In particular, the present invention provides for isolated nucleic acid molecules comprising nucleotide sequences encoding the amino acid sequence shown in SEQ ID NO:2, 4, 6, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37 or 61, the nucleotide sequence set forth in SEQ ID NO:1, 3, 5, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, or 60, or the nucleotide sequence deposited in a bacterial host as Accession No. NRRL B-30961, B-30955, B-30956, B-30957, B-30958, B-30942, B-30939, B-30941, B-50047, B-50047, B-30959, B-30960, B-30943, B-50048, or B-50048, as well as variants and fragments thereof.

Compositions and methods for conferring herbicide resistance to bacteria, plants, plant cells, tissues and seeds are provided. Compositions include nucleic acid molecules encoding herbicide resistance or tolerance polypeptides, vectors comprising those nucleic acid molecules, and host cells comprising the vectors. The nucleotide sequences of the invention can be used in DNA constructs or expression cassettes for transformation and expression in organisms, including microorganisms and plants. Compositions also comprise transformed bacteria, plants, plant cells, tissues, and seeds. In particular, the present invention provides for isolated nucleic acid molecules comprising the nucleotide sequence set forth in SEQ ID NO:1, 3, 4, 6, 7, 9, 10, 12, 13, 15, 17, 18, 20, 21, or 23, a nucleotide sequence encoding the amino acid sequence shown in SEQ ID NO:2, 5, 8, 11, 14, 16, 19, or 22, the herbicide resistance nucleotide sequence deposited in a bacterial host as Accession Nos. NRRL B-30932, B-30933, B-30934, B-30945, B-30946, B-30947, or B-30948, as well as variants and fragments thereof.

Compositions and methods for conferring herbicide resistance to bacteria, plants, plant cells, tissues and seeds are provided. Compositions include nucleic acid molecules encoding herbicide resistance or tolerance polypeptides, vectors comprising those nucleic acid molecules, and host cells comprising the vectors. The nucleotide sequences of the invention can be used in DNA constructs or expression cassettes for transformation and in organisms, including microorganisms and plants. Compositions also comprise transformed bacteria, plants, plant cells, tissues, and seeds. In particular, the present invention provides for isolated nucleic acid molecules comprising the nucleotide sequence set forth in SEQ ID NO:1 or 14, a nucleotide sequence encoding the amino acid sequence shown in SEQ ID NO:2, the herbicide resistance nucleotide sequence deposited in a bacterial host as Accession Nos. NRRL B-30931, as well as variants and fragments thereof.

Compositions and methods for conferring pesticidal activity to bacteria, plants, plant cells, tissues and seeds are provided. Compositions comprising a coding sequence for pesticidal polypeptides are provided. The coding sequences can be used in DNA constructs or expression cassettes for transformation and expression in plants and bacteria. Compositions also comprise transformed bacteria, plants, plant cells, tissues, and seeds. In particular, isolated pesticidal nucleic acid molecules are provided. Additionally, amino acid sequences corresponding to the polynucleotides are encompassed. In particular, the present invention provides for isolated nucleic acid molecules comprising nucleotide sequences encoding the amino acid sequence shown in SEQ ID NO:2, 4, 6, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37 or 61, the nucleotide sequence set forth in SEQ ID NO:1, 3, 5, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, or 60, or the nucleotide sequence deposited in a bacterial host as Accession No. NRRL B-30961, B-30955, B-30956, B-30957, B-30958, B-30942, B-30939, B-30941, B-50047, B-30959, B-30960, B-30943, or B-50048, as well as variants and fragments thereof.

The present invention relates generally to the production, purification, and isolation of human growth hormone (hGH). More particularly, the invention relates to the production, purification, and isolation of substantially purified hGH from recombinant host cells or culture medium including, for example, yeast, insect, mammalian and bacterial host cells. The process of the present invention is also useful for purification of hGH linked to polymers or other molecules.

Long rod shaped M13 viruses were used to fabricate one dimensional (1D) micro- and nanosized diameter fibers by mimic the spinning process of the silk spider. Liquid crystalline virus suspensions were extruded through the micrometer diameter capillary tubes in cross-linking solution (glutaraldehyde). Resulting fibers were tens of micrometers in diameter depending on the inner diameter of the capillary tip. AFM image verified that molecular long axis of the virus fibers were parallel to the fiber long axis. Although aqueous M13 virus suspension could not be spun by electrospinning, M13 viruses suspended in 1,1,1,3,3,3-hexafluoro-2-propanol were spun into fibers. After blending with highly water soluble polymer, polyvinyl 2-pyrolidone (PVP), M13 viruses was spun into continuous uniform virus blended PVP (virus-PVP) fibers. Resulting virus-PVP electrospun fibers showed intact infecting ability to bacterial hosts after suspending in the buffer solution.

The present invention relates to the field of recombinant toxin protein production in bacterial hosts. In particular, the present invention relates to production processes for obtaining high levels of a recombinant CRM197, Diphtheria Toxin, Pertussis Toxin, Tetanus Toxoid Fragment C, Cholera Toxin B, Cholera holotoxin, and Pseudomonas Exotoxin A, from a bacterial host.

The present invention relates to a method of creating DNA libraries that include an artificial promoter library and / or a modified ribosome binding site library and transforming bacterial host cells with the library to obtain a population of bacterial clones having a range of expression levels for a chromosomal gene of interest.

The present invention relates generally to the production, purification, and isolation of human growth hormone (hGH). More particularly, the invention relates to the production, purification, and isolation of substantially purified hGH from recombinant host cells or culture medium including, for example, yeast, insect, mammalian and bacterial host cells. The process of the present invention is also useful for purification of hGH linked to polymers or other molecules.

Expression of at least one plant oleosin gene in a microbial cell engineered to produce hydrophobic / lipophilic compounds significantly increases the overall titer of the compound. The hydrophobic nature of the oleosin core is believed to increase the microbial host cell's internal storage capacity for any hydrophobic / lipophilic compound. The method is exemplified using a bacterial host cell engineered to produce significant amount of various carotenoids.

Long rod shaped M13 viruses were used to fabricate one dimensional (1D) micro- and nanosized diameter fibers by mimic the spinning process of the silk spider. Liquid crystalline virus suspensions were extruded through the micrometer diameter capillary tubes in cross-linking solution (glutaraldehyde). Resulting fibers were tens of micrometers in diameter depending on the inner diameter of the capillary tip. AFM image verified that molecular long axis of the virus fibers were parallel to the fiber long axis. Although aqueous M13 virus suspension could not be spun by electrospinning, M13 viruses suspended in 1,1,1,3,3,3-hexafluoro-2-propanol were spun into fibers. After blending with highly water soluble polymer, polyvinyl 2-pyrolidone (PVP), M13 viruses was spun into continuous uniform virus blended PVP (virus-PVP) fibers. Resulting virus-PVP electrospun fibers showed intact infecting ability to bacterial hosts after suspending in the buffer solution.

The present invention relates to the field of recombinant toxin protein production in bacterial hosts. In particular, the present invention relates to production processes for obtaining high levels of a recombinant CRM197, Diphtheria Toxin, Pertussis Toxin, Tetanus Toxoid Fragment C, Cholera Toxin B, Cholera holotoxin, and Pseudomonas Exotoxin A, from a bacterial host.

Methanotrophic bacterial strains are provided that have been optimized for the production of carotenoid compounds through the down-regulation of one or more of the crtN1, aid, crtN2 and crtN3 genes of the carotenoid biosynthetic pathway. The resulting strains lack pigmented C30 carotenoid compounds, and show an increase in the production of C40 carotenoids. The use of the optimized host strains for the production of the C40 carotenoids canthaxanthin and astaxanthin is also described.

The invention relates to the field of microbes and provides a novel salmonella phage and a composition, a preparation method and application thereof. The novelsalmonella phage is Myoviridaesp. BP-66 with the preservation numberCCTCC NO: M2015146,Myoviridaesp. BP-63 with preservation number CCTCC NO: M2015145, or Chilikevirussp. BP-12 with the preservation number CCTCCNO: M2015141. The novel phage is a strict virulent phage, has high toxicity to host bacteria, has a wider host range and still has high toxicity to the host bacteria at low concentration. The DNA of the phage cannot encode protein possibly causing potential health risks. The novel phage stably survives in a culture solution at room temperature and survive for more than 6 months at the temperature below 4 DEG C. In addition, the phage can be proliferated on pathogenic bacterial hosts, and large-scale industrial production can be achieved. The salmonella phage can provide excellent strain resources for application of phage therapy.

The invention discloses a microbial cell sensor for detecting toluene organic pollutants and a detection method thereof, and relates to a microbial cell sensor for detecting toluene organic pollutants, which is constructed by using a regulatory sequence of pseudomonas putida degradation genes and a plasmid sequence of regulatory protein genes and commercial report genes, and a detection method thereof. The bacterial host is Escherichia coli, and is used for detecting toluene organic matters. The lowest detection concentration on the toluene is 40 micromoles per liter, and the highest detection concentration on the toluene is 1,000 micromoles per liter.

The present invention relates to DNA constructs that can produce antimicrobial materials efficiently from microorganisms and the preparation method thereof. The present invention also relates to the useful vector for the DNA construct. The DNA construct according to the present invention comprises a first gene coding for entire, a part of or a derivative of purF gene and a second gene coding for antimicrobial peptide. According to the present invention, antimicrobial peptides can be mass-produced by the following steps: preparing an expression vector containing a DNA construct comprising a first gene coding for an entire, a part of or a derivative of purF gene and a second gene coding for antimicrobial peptide; transforming the bacterial host cells with the above-mentioned vector, culturing the transformed cell to express the above-mentioned DNA construct; and recovering the above antimicrobial peptide.

The present invention features therapeutic bacteriophage deficient in the lysin protein (“Lys minus” phage). Lys minus bacteriophage are incapable of facilitating efficient lysis of the bacterial host since the enzymatic activity of the lysin of the phage is needed for breaking down the peptidoglycan layer of the bacterial cell wall. Lys minus bacteriophage retain activity in invasion of its appropriate bacterial host, destruction of the bacterial genome, and replication, which are sufficient to inhibit bacterial growth and replication. Therefore, the therapeutic Lys minus phage stops the spread of infection by the bacterial pathogen without lysis of the bacterium. This approach is attractive as it also prevents the release of the phage progeny, thus reducing or eliminating the potential for generation of immune responses against the phage. The incapacitated bacterial pathogen is then removed by the normal defense systems such as phagocytes and macrophages.

The invention features incapacitated whole cell bacterial immunogenic compositions produced by infecting a bacterium with Lys minus bacteriophage, which are deficient in the lysin protein. Lys minus bacteriophage retain activity in infection of its appropriate bacterial host, destruction of the bacterial genome, and replication, which are sufficient to inhibit bacterial growth and replication. The resulting, Lys minus-infected bacterium is provided in a state of bacteriostasis, and is not capable of replicating further (e.g., is “incapacitated”). The incapacitated bacterium can then be used as to elicit an immune response for prophylactic and / or therapeutic purposes. The invention thus also features incapacitated bacteria formulated appropriately for use in immunogenic compositions for eliciting an immune response, e.g., for production of antibodies in a non-human host or in a whole cell bacterial vaccine.

Disclosed are methods of producing carotenoid compounds in a methylotrophic bacterial host cell. Such a host cell may be an unmodified Methylobacterium, spontaneous mutant, or transformed cell, any of which exhibit favorable properties, such as overproduction of carotenoid compounds, increased carbon flux, improved growth, or the production of additional nutrients, such as protein, vitamins, antioxidants, or fatty acids. Also disclosed are feed compositions for use in aquaculture, or as animal feed, or as human nutritional supplements containing processed or unprocessed biomass from such cells, as are methods of preparation of the feed compositions.

The present invention provides expression vectors and helper display vectors which can be used in various combinations as vector sets for multi-species and cross-species display of polypeptides on the outer surface of prokaryotic genetic packages and / or eukaryotic host cells. The multi-species and cross-species display systems can be practiced using the vector sets of the invention without having to change or reengineer the display vectors. The display systems of the invention are particularly useful for displaying a genetically diverse repertoire or library of polypeptides on the surface of phage, bacterial host cells, yeast cells, and mammalian cells.

The present invention relates to methods for the production of oligosaccharides in genetically modified bacterial host cells, as well as to the genetically modified host cells used in the methods. The genetically modified host cell comprises at least one recombinant glycosyltransferase, and at least one nucleic acid sequence coding for a protein enabling the export of the oligosaccharide.

The invention relates to unglycosylated folded C-terminal fragments of a multidomain serine protease of the complement cascade obtainable by expression in a bacterial host, wherein said serine protease is capable of binding a recognition molecule of the complement cascade, e.g. C1 or MBL. The invention also relates to methods and bacterial expression vectors for the preparation of said fragments, uses of said fragments for raising antibodies and screening substrates or inhibitors of said serine proteases and uses of the fragments in research and treatment of complement related disorders. The invention also relates to assay methods for assessing MASP-1 and MASP-2 levels in a sample of biological origin.The invention provides for research tools, assays and diagnostic kits useful in complement research and research and diagnosis of complement related disorders.

Compositions and methods for conferring pesticidal activity to bacteria, plants, plant cells, tissues and seeds are provided. Compositions comprising a coding sequence for pesticidal polypeptides are provided. The coding sequences can be used in DNA constructs or expression cassettes for transformation and expression in plants and bacteria. Compositions also comprise transformed bacteria, plants, plant cells, tissues, and seeds. In particular, isolated pesticidal nucleic acid molecules are provided. Additionally, amino acid sequences corresponding to the polynucleotides are encompassed. In particular, the present invention provides for isolated nucleic acid molecules comprising nucleotide sequences encoding the amino acid sequence shown in SEQ ID NO:2, 4, 6, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37 or 61, the nucleotide sequence set forth in SEQ ID NO:1, 3, 5, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, or 60, or the nucleotide sequence deposited in a bacterial host as Accession No. NRRL B-30961, B-30955, B-30956, B-30957, B-30958, B-30942, B-30939, B-30941, B-50047, B-30959, B-30960, B-30943, or B-50048, as well as variants and fragments thereof.

The invention relates to the technical field of microbes, and provides a novel vibrio parahaemolyticus phage as well as a composition, a preparation method and application thereof. The novel vibrio parahaemolyticus phage specifically refers to a vibrio parahaemolyticus phage VP46 of which the collection number is CCTCC NO:M2016290, a vibrio parahaemolyticus phage VP48 of which the collection number is CCTCC NO:M2016291 or a vibrio parahaemolyticus phage VP7 of which the collection number is CCTCC NO:M2016289. The phage is a strictly virulent phage, is highly toxic to host bacteria, has a widerhost range, and is highly toxic to the host bacteria at a low concentration; DNA (Deoxyribonucleic Acid) of the phage cannot encode proteins which may cause a potential health risk; the phage survives stably in a culture solution at room temperature, and survives for more than 12 months at a temperature of below 4 DEG C; the phage can be well proliferated on a non-pathogenic bacterial host; and large-scale industrial production can be realized.

The present invention provides a recombinant gram-negative bacterial cell comprising an expression vector, comprising a recombinant polynucleotide encoding DsbC and one or more polynucleotides encoding an antibody or an antigen binding fragment thereof specifically binding to CD154.

The present invention provides a recombinant gram-negative bacterial cell comprising a mutant spr gene encoding a spr protein having a mutation at one or more amino acids selected from D133, H145, H157, N31, R62, I70, Q73, C94, S95, V98, Q99, R100, L108, Y115, V135, L136, G140, R144 and G147 and wherein the cell has reduced Tsp protein activity compared to a wild-type cell.

The present invention provides a recombinant gram-negative bacterial cell comprising a mutant spr gene encoding a mutant spr protein and wherein the cell comprises a non-recombinant wild-type chromosomal Tsp gene.