DNA recombination in eukaryotic cells by the bacteriophage PHIC31 recombination system
First Claim
Patent Images
1. A method for obtaining site-specific recombination in a eukaryotic cell, the method comprising:
- providing a eukaryotic cell that comprises an attB recombination site and an attP recombination site, which attP recombination site can serve as a substrate for recombination with the attB recombination site;
contacting the attB and the attP recombination sites with a prokaryotic recombinase polypeptide, resulting in recombination between the attB and attP recombination sites;
thereby forming an attL site and an attR site;
wherein the recombinase polypeptide can mediate site-specific recombination between the attB and attP recombination sites, but cannot mediate recombination between the attL site and the attR site formed from recombination between the attB recombination site and the attP recombination site in the absence of an additional factor that is not present in the eukaryotic cell; and
wherein the eukaryotic cell comprises a polynucleotide that encodes the recombinase polypeptide.
2 Assignments
0 Petitions
Accused Products
Abstract
This invention provides methods for obtaining specific and stable integration of nucleic acids into eukaryotic cells. The invention makes use of site-specific recombination systems that use prokaryotic recombinase polypeptides, such as the ΦC31 integrase, that can mediate recombination between the recombination sites, but not between hybrid recombination sites that are formed upon the recombination. Thus, the recombination is irreversible in the absence of additional factors. Eukaryotic cells that contain the recombinase polypeptides, or genes that encode the recombinases, are also provided.
-
Citations
10 Claims
-
1. A method for obtaining site-specific recombination in a eukaryotic cell, the method comprising:
-
providing a eukaryotic cell that comprises an attB recombination site and an attP recombination site, which attP recombination site can serve as a substrate for recombination with the attB recombination site;
contacting the attB and the attP recombination sites with a prokaryotic recombinase polypeptide, resulting in recombination between the attB and attP recombination sites;
thereby forming an attL site and an attR site;
wherein the recombinase polypeptide can mediate site-specific recombination between the attB and attP recombination sites, but cannot mediate recombination between the attL site and the attR site formed from recombination between the attB recombination site and the attP recombination site in the absence of an additional factor that is not present in the eukaryotic cell; and
wherein the eukaryotic cell comprises a polynucleotide that encodes the recombinase polypeptide. - View Dependent Claims (2, 3, 4)
-
-
5. A method for obtaining a eukaryotic cell having a stably integrated transgene, the method comprising:
-
introducing a nucleic acid into a eukaryotic cell that comprises a first attB or attP recombination site, wherein the nucleic acid comprises a transgene and a second recombination site which is an attP site, when the first site is attB site, or an attB site, when the first site is attP site, which second recombination site can serve as a substrate for recombination with the first recombination site; and
contacting the first and the second recombination sites with a prokaryotic recombinase polypeptide, wherein the recombinase polypeptide catalyzes recombination between the first and second recombination sites, resulting in integration of the nucleic acid at the first recombination site, thereby forming an attL site and an attR site at each end of the nucleic acid;
wherein the recombinase polypeptide can mediate site-specific recombination between the first and second recombination sites, but cannot mediate recombination between the attL and attR sites in the absence of an additional factor that is not present in the eukaryotic cell. - View Dependent Claims (6, 7, 8, 9, 10)
-
Specification