4366 results about "Mutant" patented technology

The invention relates to crop plants comprising novel seed lipid compositions. Provided are both wild type and mutant nucleic acid molecules encoding Brassica fatty acyl-acyl carrier protein (ACP) thioesterase B proteins (FATB) and the proteins as such. Also provided are Brassica plants, tissue and seeds comprising at least three mutant fatB alleles in their genome, whereby the seed oil fatty acid composition or profile is significantly altered.

The invention discloses a method for constructing gene site-directed mutation. The method comprises the following steps: determining a target sequence which is in a rat target genome sequence and can be identified by an artificial modified CRISPR-Cas (clustered regularly interspaced short palindromic repeats-associated protein) system; constructing a gRNA (guide ribonucleic acid) which can identify a CAS protein and guide the CAS protein to a target gene target sequence; introducing the gRNA sequence and a CAS protein coded deoxyribonucleic acid sequence or the gRNA sequence and an in-vitro expressed CAS protein mixture into a rat embryonic cell. According to the method, a homologous recombined targeting vector does not need to be constructed, ES (embryonic stem) targeting cell screening is not needed, a mutant has a high proportion, the operation is convenient, simultaneous multi-site knockout can be realized, the experiment cost can be greatly reduced, and the experiment cycle can be shortened.

A method of producing a prenyl alcohol, comprising creating a recombinant by transferring into a host a recombinant DNA for expression or a DNA for genomic integration each comprising a prenyl diphosphate synthase gene or a mutant thereof, culturing the resultant recombinant, and recovering the prenyl alcohol from the resultant culture.

IL-28A, IL-28B, IL-29, and certain mutants thereof have been shown to have antiviral activity on a spectrum of viral species. Of particular interest is the antiviral activity demonstrated on viruses that infect liver, such as hepatitis B virus and hepatitis C virus. In addition, IL-28A, IL-28B, IL-29, and mutants thereof do not exhibit some of the antiproliferative activity on hematopoietic cells that is observed with interferon treatment. Without the immunosuppressive effects accompanying interferon treatment, IL-28A, IL-28B, and IL-29 will be useful in treating immunocompromised patients for viral infections.

The present invention provides methods of increasing the half-life and/or specific activity of factor VIII. More specifically, the invention provides methods of increasing the half-life and/or specific activity of factor VIII by substituting one or more amino acids in the A2 domain. It further provides methods for producing such factor VIII mutants. The invention also provides polynucleotides encoding the mutant factor VIII, and methods of treating hemophilia using the polypeptides and polynucleotides of the invention.

A method for isolating succinic acid producing bacteria is provided comprising increasing the biomass of an organism which lacks the ability to catabolize pyruvate, and then subjecting the biomass to glucose-rich medium in an anaerobic environment to enable pyruvate-catabolizing mutants to grow.The invention also provides for a mutant that produces high amounts of succinic acid, which has been derived from a parent which lacked the genes for pyruvate formate lyase and lactate dehydrogenase, and which belongs to the E.coli Group of Bacteria.

Methods of treating and evaluating subjects having neoactive mutants are described herein.

A mutant of a potentially therapeutic anti-CD40 antibody is provided which mutant has reduced ADCC and CDC activities designed to be optimized as a pharmaceutical agent. A mutant of an agonistic anti-CD40 antibody, comprising mutation and/or substitution of at least one amino acid in the constant region to reduce the ADCC and/or CDC activities therein, and a mutant of an antagonistic anti-CD40 antibody, comprising at least one mutation or substitution in the constant region to reduce the ADCC and/or CDC activities therein, both mutants having at least a hinge region derived from a human IgG2.

A highly stable mutant of human IgG4 antibody is provided. Such antibody is an antibody in which the CH3 domain of human IgG4 is substituted with the CH3 domain of human IgG1 and which exhibits inhibited aggregate formation, an antibody in which the CH3 and CH2 domains of human IgG4 are substituted with the CH3 and CH2 domains of human IgG1, respectively, or an antibody in which arginine at position 409 indicated in the EU index proposed by Kabat et al. of human IgG4 is substituted with lysine and which exhibits inhibited aggregate formation.

The present invention relates to a method of constructing a variant of a parent Termamyl-like alpha-amylase, which variant has alpha-amylase activity and at least one altered property as compared to the parent alpha-amylase, comprisesi) analysing the structure of the parent Termamyl-like alpha-amylase to identify at least one amino acid residue or at least one structural part of the Termamyl-like alpha-amylase structure, which amino acid residue or structural part is believed to be of relevance for altering the property of the parent Termamyl-like alpha-amylase (as evaluated on the basis of structural or functional considerations),ii) constructing a Termamyl-like alpha-amylase variant, which as compared to the parent Termamyl-like alpha-amylase, has been modified in the amino acid residue or structural part identified in i) so as to alter the property, and, optionally,iii) testing the resulting Termamyl-like alpha-amylase variant with respect to the property in question.

Disclosed herein are novel polypeptides and the nucleic acid sequences that encode them. Also disclosed are antibodies that immunospecifically bind to the polypeptide, as well as derivatives, variants, mutants, or fragments of the novel polypeptide, polynucleotide, or antibody specific to the polypeptide. Vectors, host cells, antibodies and recombinant methods for producing the polypeptides and polynucleotides, as well as methods for using same are also included. The invention further discloses therapeutic, diagnostic and research methods for diagnosis, treatment, and prevention of apoptosis associated disorders involving these novel human nucleic acids and proteins.

A method of producing coryneform bacteria having improved amino acid or nucleic acid productivity comprising the steps of introducing a mutation in a promoter sequence of amino acid- or nucleic acid-biosynthesizing genes on a chromosome of a coryneform bacterium to make it close to a consensus sequence, or introducing a change in a promoter sequence of amino acid- or nucleic acid-biosynthesizing genes on a chromosome of a coryneform bacterium by gene recombination to make it close to a consensus sequence, to obtain mutants of the coryneform amino acid- or nucleic acid-producing microorganism, culturing the mutants and selecting a mutant capable of producing the intended amino acid or nucleic acid in a large amount. This method allows the construction of a mutant capable of enriching or controlling the expression of an intended gene without using a plasmid and to promote production of amino acids in a high yield by recombination or mutation.

The present invention relates to mutants of Fibroblast Growth Factor (FGF), particularly FGF-20 and FGF-21, which contain newly introduced N-linked or O-linked glycosylation site(s). The polynucleotide coding sequences for the mutants, expression cassettes comprising the coding sequences, cells expressing the mutants, and methods for producing the mutants are also disclosed. Further disclosed are pharmaceutical compositions comprising the mutants and method for using the mutants.

The present invention provides polypeptides having a nucleotide polymerase activity and method of enhancing polymerase activity. The polypeptides of the present invention may posses both a DNA-dependent DNA polymerase activity and an RNA-dependent DNA polymerase activity, i.e., a reverse transcriptase activity. The polypeptides of the present invention may be used in any application including, but not limited to, DNA sequencing reactions, amplification reactions, cDNA synthesis reactions, and combined cDNA synthesis and amplification reactions, e.g., RT-PCR.

The present invention is directed to isolated thraustochytrid microorganisms as well as strains and mutants thereof. The invention is further directed to biomasses, microbial oils, compositions, cultures, methods of producing microbial oils, and methods of using the isolated thraustochytrids, biomasses, and microbial oils.