Site-specific recombination in human cells catalyzed by the wild-type integrase protein of coliphage HK022

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Abstract

The activity of the Integrase (Int) protein encoded by coliphage HK022 was tested in a human cell culture. Plasmids were constructed as substrates that carry the sites of the integration reaction (attP and attB) or the sites of excision (attL and attR). The site-specific recombination reactions were monitored in cis and in trans configurations by the expression of the green fluorescent protein (GFP) as a reporter. Cells cotransfected with the substrate plasmid(s) and with a plasmid that expresses the wild-type Int show efficient integration as well as excision in both configurations. The wild-type Int was active in the human cells without the need to supply the accessory proteins integration host factor (IHF) and excisionase (Xis) that are indispensable for the reaction in the bacterial host.

Original languageEnglish
Pages (from-to)56-60
Number of pages5
JournalBiotechnology and Bioengineering
Volume84
Issue number1
DOIs
StatePublished - 5 Oct 2003

Keywords

  • Green fluorescent protein
  • Human cells
  • Integrase
  • Phage HK022
  • Site-specific recombination

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