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Targeted integration and expression of exogenous nucleic acid sequences

  • US 20070134796A1
  • Filed: 07/26/2006
  • Published: 06/14/2007
  • Est. Priority Date: 07/26/2005
  • Status: Abandoned Application
First Claim
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1. A method for expressing the product of an exogenous nucleic acid sequence in a cell, the method comprising:

  • (a) expressing a first fusion protein in the cell, the first fusion protein comprising a first zinc finger binding domain and a first cleavage half-domain, wherein the first zinc finger binding domain has been engineered to bind to a first target site in a region of interest in the genome of the cell;

    (b) expressing a second fusion protein in the cell, the second fusion protein comprising a second zinc finger binding domain and a second cleavage half domain, wherein the second zinc finger binding domain binds to a second target site in the region of interest in the genome of the cell, wherein the second target site is different from the first target site; and

    (c) contacting the cell with a polynucleotide comprising an exogenous nucleic acid sequence and a first nucleotide sequence that is homologous to a first sequence in the region of interest;

    wherein binding of the first fusion protein to the first target site, and binding of the second fusion protein to the second target site, positions the cleavage half-domains such that the genome of the cell is cleaved in the region of interest, thereby resulting in integration of the exogenous sequence into the genome of the cell in the region of interest and expression of the product of the exogenous sequence.

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