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Molecular and Cellular Biology, June 2001, p. 3926-3934, Vol. 21, No. 12
Department of Genetics, Stanford University
School of Medicine, Stanford, California 94305-5120
Received 12 January 2001/Returned for modification 21 February
2001/Accepted 23 March 2001
We previously established that the phage
0270-7306/01/$04.00+0 DOI: 10.1128/MCB.21.12.3926-3934.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Site-Specific Genomic Integration in Mammalian
Cells Mediated by Phage
C31 Integrase
C31 integrase, a
site-specific recombinase, mediates efficient integration in the human
cell environment at attB and attP phage
attachment sites on extrachromosomal vectors. We show here that phage
attP sites inserted at various locations in human and
mouse chromosomes serve as efficient targets for precise site-specific
integration. Moreover, we characterize native "pseudo"
attP sites in the human and mouse genomes that also
mediate efficient integrase-mediated integration. These sites have
partial sequence identity to attP. Such sites form
naturally occurring targets for integration. This phage
integrase-mediated reaction represents an effective site-specific
integration system for higher cells and may be of value in gene therapy
and other chromosome engineering strategies.
*
Corresponding author. Mailing address: Department of
Genetics, Stanford University School of Medicine, Stanford, CA
94305-5120. Phone: (650) 723-5558. Fax: (650) 725-1534. E-mail:
calos{at}stanford.edu.
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