Recombinational DNA repair: the RecF and RecR proteins limit the extension of RecA filaments beyond single-strand DNA gaps

Cell. 1997 Oct 31;91(3):347-56. doi: 10.1016/s0092-8674(00)80418-3.


In the presence of both the RecF and RecR proteins, RecA filament extension from a single strand gap into adjoining duplex DNA is attenuated. RecR protein alone has no effect, and RecF protein alone has a reduced activity. The RecFR complexes bind randomly, primarily to the duplex regions of the DNA, and the extension of the RecA filament is halted at the first complex encountered. A very slow lengthening of RecA filaments observed in the presence of RecFR is virtually eliminated when RecF is replaced with an RecF mutant protein that does not hydrolyze ATP. These observations are incorporated into an expanded model for the functions of RecF, RecO, and RecR proteins in the early stages of postreplication DNA repair.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Bacterial Proteins / metabolism*
  • DNA / metabolism
  • DNA / ultrastructure
  • DNA Repair*
  • DNA Replication
  • DNA, Single-Stranded
  • DNA-Binding Proteins / metabolism*
  • Escherichia coli / genetics
  • Escherichia coli Proteins*
  • Protein Binding
  • Rec A Recombinases / metabolism*
  • Recombination, Genetic*


  • Bacterial Proteins
  • DNA, Single-Stranded
  • DNA-Binding Proteins
  • Escherichia coli Proteins
  • RecR protein, E coli
  • recF protein, E coli
  • RecR protein, Bacteria
  • DNA
  • recF protein, Bacteria
  • Rec A Recombinases