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A phage integrase directs efficient site-specific integration in human cells

Open access
Groth, Amy C., Olivares, Eric C., Thyagarajan, Bhaskar, Calos, Michele P.·2000·Proceedings of the National Academy of Sciences

Abstract

The integrase from the Streptomyces phage φC31 carries out efficient recombination between the attP site in the phage genome and the attB site in the host bacterial chromosome. In this paper, we show that the enzyme also functions in human cells. A plasmid assay system was constructed that measured intramolecular integration of attP into attB . This assay was used to demonstrate that in the presence of the φC31 integrase, precise unidirectional integration occurs with an efficiency of 100% in Escherichia coli and >50% in human cells. This assay system was also used to define the minimal sizes of attB and attP at 34 bp and 39 bp, respectively. Furthermore, precise and efficient intermolecular integration of an incoming plasmid bearing attP into an established Epstein–Barr virus plasmid bearing attB was documented in human cells. This work is a demonstration of efficient, site-specific, unidirectional integration in mammalian cells. These observations form the basis for site-specific integration strategies potentially useful in a broad range of genetic engineering applications.

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Metadata

Authors
Groth, A. C., Olivares, E. C., Thyagarajan, B., & Calos, M. P.
Venue
Proceedings of the National Academy of Sciences
Published
2000-05-09
Volume
97
Issue
11
Pages
5995-6000
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1988379532
Cited by
495
References
0
FWCI
4.62
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: A phage integrase directs efficient site-specific integration in human cells. https://app.cochat.ai/papers/10.1073/pnas.090527097
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Groth, A. C., Olivares, E. C., Thyagarajan, B., & Calos, M. P. (2000). A phage integrase directs efficient site-specific integration in human cells. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.090527097

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