Molecular and General Genetics MGG

, Volume 263, Issue 1, pp 73–80

RAD52-dependent and -independent homologous recombination initiated by Flp recombinase at a single FRT site flanked by direct repeats

  • F. Prado
  • S. González-Barrera
  • A. Aguilera
ORIGINAL PAPER

Abstract

We have devised a system for isolating yeast DNA sequences that are able to act as initiators of recombination leading to deletions in mitotically growing yeast cells. This system has allowed us to identify the FRT site of the 2μ site-specific recombinase Flp as such a sequence. We show that Flp is able to initiate recombination leading to deletions at a single FRT site in ciro strains. These results indicate that Flp is able to cleave a single FRT site, supporting the observation that the mechanism of cleavage by Flp is trans-horizontal. Interestingly, Flp can induce homologous recombination in both a RAD52-dependent and RAD52-independent manner. Our work provides a new system for the study of homologous recombination leading to deletions, in which the initiation step can be efficiently controlled. We discuss the possibility that Flp-induced, RAD52-independent events occur by single-strand annealing.

Key words Flp-induced homologous recombination RAD52-independent deletions ciro strains Direct repeats Single-strand annealing 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • F. Prado
    • 1
  • S. González-Barrera
    • 1
  • A. Aguilera
    • 1
  1. 1.Departamento de Genética, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes 6, 41012 Sevilla, Spain E-mail: aguilo@cica.es Tel.: +34-954-557107; Fax: +34-954-557104ES

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