摘要:
Rationally-designed LAGLIDADG meganucleases and methods of making such meganucleases are provided. In addition, methods are provided for using the meganucleases to generate recombinant cells and organisms having a desired DNA sequence inserted into a limited number of loci within the genome, as well as methods of gene therapy, for treatment of pathogenic infections, and for in vitro applications in diagnostics and research.
摘要:
The invention features a method of promoting an alteration at a selected site in a target DNA, e.g., in the chromosomal DNA of a cell. The method includes providing, at the site: (a) a double stranded DNA sequence which includes a selected DNA sequence; (b) an agent which enhances homologous recombination, e.g., a Rad52 protein or a functional fragment thereof; and (c) an agent which inhibits non-homologous end joining, e.g., an agent which inactivates Ku such as an anti-Ku antibody or a Ku-binding oligomer or polymer, and allowing the alteration to occur. The agent which inhibits non-homologous end joining, e.g., a Ku inactivating agent such as an anti-Ku antibody, is preferably provided locally. Component (a), (b), and (c) can be introduced together, which is preferred, or separately.
摘要:
Disclosed is a method for introducing a mutation into a gene, which comprises the following steps: a homologous recombination step of carrying out the homologous recombination between a target gene into which the mutation is to be introduced and a target recombinant vector, thereby substituting an exon in the target gene into which the mutation is to be introduced by a target DNA sequence in the target recombinant vector; and a mutation introduction step of carrying out the specific recombination between the target DNA sequence in the resulting target recombinant gene and a mutation introduction cassette of a mutation introduction vector carrying a mutated DNA sequence containing a mutant exon by the intervening action of Cre recombinase to substitute the target DNA sequence by the mutated DNA in the mutation introduction cassette, thereby producing a mutation-introduced gene into which the mutant DNA sequence has been introduced. The method enables the production of a knock-in non-human mammalian animal, such as a knock-in mouse, which carries the mutation-introduced gene.
摘要:
Rationally-designed LAGLIDADG meganucleases and methods of making such meganucleases are provided. In addition, methods are provided for using the meganucleases to generate recombinant cells and organisms having a desired DNA sequence inserted into a limited number of loci within the genome, as well as methods of gene therapy, for treatment of pathogenic infections, and for in vitro applications in diagnostics and research.
摘要:
Disclosed herein are compositions for linking DNA binding domains and cleavage domains (or cleavage half-domains) to form non-naturally occurring nucleases. Also described are methods of making and using compositions comprising these linkers.
摘要:
The present invention provides for a new type of gene trap cassettes, which can induce conditional mutations. The cassettes rely on directional site-specific recombination systems, which can repair and re-induce gene trap mutations when activated in succession. After the gene trap cassettes are inserted into the genome of the target organism, mutations can be activated at a particular time and place in somatic cells. In addition to their conditional features, the gene trap cassettes create multipurpose alleles amenable to a wide range of post-insertional modifications. Such gene trap cassettes can be used to mutationally inactivate all cellular genes. In addition the invention relates to a cell, preferably a mammalian cell which contains the above mentioned gene trap cassette. Moreover, the invention relates to the use of said cell for identification and/or isolation of genes and for the creation of transgenic organisms to study gene function at various developmental stages, including the adult, as well as for the creation of animal models of human disease useful for in vivo drug target validation. In conclusion, the present invention provides a process which enables a temporally and/or spatially restricted inactivation of all genes that constitute a living organism.
摘要:
Expression vectors and transfection systems providing high expression of a desired polypeptide are provided. Also provided are methods of using the expression vectors and transfection systems and mammalian cells modi fied by these compositions and methods.
摘要:
The production of genetically modified animals, in which the genetic modifications are engineered in somatic cells cultured in vitro by gene targeting, is described. Genetically modified cells may then be used as nuclear donors loci in animal chromosomes which are suitable sites for transgene addition to cells.
摘要:
The invention relates to transgenic non-human animals capable of producing heterologous antibodies and methods for producing human sequence antibodies which bind to human antigens with substantial affinity.