RecA is a DNA-dependent ATPase and functions in DNA repair systems. RecA protein catalyses an ATP-dependent DNA strand-exchange reaction that is the central step in the repair of dsDNA breaks by homologous recombination [1].

1: recA protein of Escherichia coli promotes branch migration, a kinetically distinct phase of DNA strand exchange. Cox MM, Lehman IR; Proc Natl Acad Sci U S A. 1981;78:3433-3437. PMID:7022448