Abstract
ΦC31 integrase, a site-specific large serine recombinase, is a useful tool for genome engineering in a variety of eukaryotic species and cell types. ΦC31 integrase performs efficient recombination between its attB site and either its own placed attP site or a partially mismatched genomic pseudo attP site. Bxb1 integrase, another large serine recombinase, has a similar level of recombinational activity, but recognizes only its own attB and attP sites. Previously, we have used these integrases sequentially to integrate plasmid DNA into the genome. This approach relied on placing a landing pad attP for Bxb1 integrase in the genome by using phiC31 integrase-mediated recombination at a genomic pseudo attP site. In this chapter, we present a protocol for using these integrases simultaneously to facilitate cassette exchange at a predefined location. This approach permits greater control and accuracy over integration. We also present a general method for using polymerase chain reaction assays to verify that the desired cassette exchange occurred successfully.
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Acknowledgements
This work was supported by grants from the California Institute for Regenerative Medicine.
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Geisinger, J.M., Calos, M.P. (2015). Using Phage Integrases in a Site-Specific Dual Integrase Cassette Exchange Strategy. In: Pruett-Miller, S. (eds) Chromosomal Mutagenesis. Methods in Molecular Biology, vol 1239. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-1862-1_3
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DOI: https://doi.org/10.1007/978-1-4939-1862-1_3
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