High throughput gene inactivation with large scale gene targeting
First Claim
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1. A recombination based method for the generation of a specific disruption in a cloned mammalian genomic sequence of interest, the method comprising:
- contacting in a bacterial cell,(A) a first vector, containing (i) a mammalian genomic DNA sequence of interest of at least about 25 kb in length, (ii) a cleavage site for an endonuclease that cuts once in the vector backbone, (iii) a positive selection marker for said bacterial cell, and (iv) a single copy number origin of replication functional in said bacterial cell, and(B) a second vector containing (I) a recombination sequence of from about 20 to 1000 bp and having sequence identity with a portion of said genomic DNA sequence of interest, (ii) a positive selection marker for mammalian cells, (iii) a positive selection marker for said bacterial cell, and (iv) a single copy number origin of replication functional in said bacterial cell, that is disparate and compatible with said origin of replication in said first vector andmaintaining said bacterial cell under conditions that promote homologous recombination;
wherein said second vector integrates into said first vector by homologous recombination between said mammalian genomic DNA sequence and said recombination sequence to provide a single recombinant vector comprising an insertion in said mammalian genomic sequence of interest, which recombinant vector is stable and maintained as a single copy in said bacterial cell.
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Abstract
The present invention provides a vector system that is useful for the generation of mutations in a recombination-based construction method. The invention further includes the incorporation of mutations generated by the method of the present invention into mouse embryonic stem cells and transgenic mice.
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Citations
14 Claims
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1. A recombination based method for the generation of a specific disruption in a cloned mammalian genomic sequence of interest, the method comprising:
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contacting in a bacterial cell, (A) a first vector, containing (i) a mammalian genomic DNA sequence of interest of at least about 25 kb in length, (ii) a cleavage site for an endonuclease that cuts once in the vector backbone, (iii) a positive selection marker for said bacterial cell, and (iv) a single copy number origin of replication functional in said bacterial cell, and (B) a second vector containing (I) a recombination sequence of from about 20 to 1000 bp and having sequence identity with a portion of said genomic DNA sequence of interest, (ii) a positive selection marker for mammalian cells, (iii) a positive selection marker for said bacterial cell, and (iv) a single copy number origin of replication functional in said bacterial cell, that is disparate and compatible with said origin of replication in said first vector and maintaining said bacterial cell under conditions that promote homologous recombination;
wherein said second vector integrates into said first vector by homologous recombination between said mammalian genomic DNA sequence and said recombination sequence to provide a single recombinant vector comprising an insertion in said mammalian genomic sequence of interest, which recombinant vector is stable and maintained as a single copy in said bacterial cell. - View Dependent Claims (2, 3, 4, 5)
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6. A method for disrupting a mammalian genomic sequence of interest, the method comprising:
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contacting in a bacterial cell, (A) a first vector, containing (I) a mouse genomic DNA sequence of interest of at least about 25 kb in length, (ii) a cleavage site for an endonuclease that cuts once in the vector backbone, (iii) a positive selection marker for said bacterial cell, and (iv) a single copy number origin of replication functional in said bacterial cell, and (B) a second vector containing (I) a recombination sequence of from about 20 to 1000 bp and having sequence identity with a portion of said genomic DNA sequence of interest, (ii) a positive selection marker for mammalian cells, (iii) a positive selection marker for said bacterial cell, and (iv) a single copy number origin of replication functional in said bacterial cell, that is disparate and compatible with said origin of replication in said first vector; and maintaining said bacterial cell under conditions that promote homologous recombination;
wherein said second vector integrates into said first vector by homologous recombination between said mammalian genomic DNA sequence and said recombination sequence to provide a single recombinant vector comprising an insertion in said mammalian genomic sequence of interest, which recombinant vector is stable and maintained as a single copy in said bacterial cell;isolating said recombinant vector; linearizing said recombinant vector by cleavage of said cleavage site; and transfecting said linearized vector into mouse embryonic stem cells comprising said mammalian genomic sequence of interest. - View Dependent Claims (7)
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8. A bacterial cell comprising:
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(A) a first vector, containing (i) a mammalian genomic DNA sequence of interest of at least about 25 kb in length, (ii) a cleavage site for an endonuclease that cuts once in the vector backbone, (iii) a positive selection marker for said bacterial cell, and (iv) a single copy number origin of replication functional in said bacterial cell, and (B) a second vector containing (i) a recombination sequence of from about 20 to 1000 bp and having sequence identity with a portion of said genomic DNA sequence of interest, (ii) a positive selection marker for mammalian cells, (iii) a positive selection marker for said bacterial cell, and (iv) a single copy number origin of replication functional in said bacterial cell, that is disparate and compatible with said origin of replication in said first vector. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification