RecT or RecET cloning and subcloning method
First Claim
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1. A method for cloning DNA molecules in cells comprising the steps of:
- a) providing means for performing homologous recombination via a RecT dependent mechanism within a host cell and/or in vitro, b) i) contacting in said host cell a first DNA molecule which is capable of being replicated in said host cell with a second DNA molecule under conditions which favour homologous recombination between said first and second DNA molecules and/or ii) contacting in vitro a first DNA molecule which is capable of being replicated in said host cell with a second DNA molecule under conditions which favour homologous recombination between said first and second DNA molecules and introducing recombined DNA molecules into said host cell, and c) selecting a host cell in which homologous recombination between said first and second DNA molecules has occurred, wherein a chemically competent host cell and a RecA activity are provided.
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Abstract
The invention refers to an improved method for DNA cloning and subcloning using Rec T or RecET-mediated homologous recombination. Further, novel reagent kits suitable for carrying out the method are provided.
2 Citations
48 Claims
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1. A method for cloning DNA molecules in cells comprising the steps of:
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a) providing means for performing homologous recombination via a RecT dependent mechanism within a host cell and/or in vitro, b) i) contacting in said host cell a first DNA molecule which is capable of being replicated in said host cell with a second DNA molecule under conditions which favour homologous recombination between said first and second DNA molecules and/or ii) contacting in vitro a first DNA molecule which is capable of being replicated in said host cell with a second DNA molecule under conditions which favour homologous recombination between said first and second DNA molecules and introducing recombined DNA molecules into said host cell, and c) selecting a host cell in which homologous recombination between said first and second DNA molecules has occurred, wherein a chemically competent host cell and a RecA activity are provided. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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- 33. Use of chemically competent cells and the RecT protein, the RecA protein and optionally the RecE protein in a cloning method involving homologous recombination.
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34. Use of chemically competent cells capable of expressing the recT gene, the recA gene and optionally the recE gene as a host cell for a cloning method involving homologous recombination.
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35. A method for cloning DNA molecules in cells comprising the steps of:
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a) providing means for performing homologous recombination via a RecT dependent mechanism within a host cell and/or in vitro, b) i) contacting in said host cell a first DNA molecule which is capable of being replicated in said host cell with a second DNA molecule under conditions which favour homologous recombination between said first and second DNA molecules and/or ii) contacting in vitro a first DNA molecule which is capable of being replicated in said host cell with a second DNA molecule under conditions which favour homologous recombination between said first and second DNA molecules and introducing recombined DNA molecules into said host cell, and c) selecting a host cell in which homologous recombination between said first and second DNA molecules has occurred, wherein a RecA activity is provided. - View Dependent Claims (38, 39, 41)
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42. An extrachromosomal vector system capable of expressing recT and recA genes and optionally the recE gene in a host cell.
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43. Use of a vector system capable of expressing recT and recA genes and optionally the recE gene in a host cell for a cloning method involving homologous recombination.
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44. A reagent kit for cloning comprising
(a) a host cell (b) means for providing RecT and RecA activity and optionally RecE activity (i) within said host cell, e.g. by expressing recT and recA genes and optionally the recE gene in said host cell and/or (ii) in vitro, e.g. by preincubating at least one of said proteins outside said host cell with DNA molecules, and (c) a recipient cloning vehicle capable of being replicated in said cell.
Specification