Biological roles of the Escherichia coli RuvA, RuvB and RuvC proteins revealed

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In Escherichia coli, the ruvA, ruvB and ruvC gene products are required for genetic recombination and the recombinational repair of DNA damage. New studies suggest that these three proteins function late in recombination and process Holliday junctions made by RecA protein-mediated strand exchange. In vitro, RuvA protein binds a Holliday junction with high affinity and, together with RuvB (an ATPase), promotes ATP-dependent branch migration of the junction leading to the formation of heteroduplex DNA. The third protein, RuvC, which acts independently of RuvA and RuvB, resolves recombination intermediates by specific endonucleolytic cleavage of the Holliday junction.
Original languageEnglish
Pages (from-to)2755-2759
Number of pages5
JournalMolecular Microbiology
Issue number19
Publication statusPublished - 1 Oct 1992


  • Adenosine Triphosphate
  • Bacterial Proteins
  • Base Sequence
  • DNA Helicases
  • DNA Repair
  • DNA-Binding Proteins
  • Endodeoxyribonucleases
  • Escherichia coli
  • Escherichia coli Proteins
  • Molecular Sequence Data
  • Recombination, Genetic


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