DNA-dependent ATPases in Bacillus subtilis mutants and in competent cells

Three DNA-dependent ATPases (gamma phosphohydrolases) can be isolated from Bacillus subtilis cells. We studied these enzymes in a number of mutants deficient in recombination or repair functions (rec, uvr) and in competent cells. The recA mutant studied had lower ATPase II activity, while competent cells had higher ATPase I activity, in comparison with the parental strain not brought to competence.