title: recA protein-catalyzed strand assimilation: stimulation by Escherichia coli single-stranded DNA-binding protein.
abstract: The single-stranded DNA-binding protein of Escherichia coli significantly alters the strand assimilation reaction catalyzed by recA protein [McEntee, K., Weinstock, G. M. & Lehman, I. R. (1979) Proc. Natl. Acad. Sci. USA 76, 2615--2619]. The binding protein (i) increases the rate and extent of strand assimilation into homologous duplex DNA, (ii) enhances the formation of a complex between recA protein and duplex DNA in the presence of homologous or heterologous single-stranded DNA, (iii) reduces the rate and extent of ATP hydrolysis catalyzed by recA protein in the presence of single-stranded DNA, (iv) reduces the high concentration of recA protein required for strand assimilation, and (v) permits detection of strand assimilation in the presence of the ATP analog, adenosine 5'-O-(O-thiotriphosphate). Single-stranded DNA-binding protein purified from a binding protein mutant (lexC) is considerably less effective than wild-type binding protein in stimulating strand assimilation, a result which suggests that single-stranded DNA-binding protein participates in general recombination in vivo.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism; D001426:Bacterial Proteins / Q000378:metabolism; D004265:DNA Helicases / Q000235:genetics / Q000378:metabolism*; D004269:DNA, Bacterial / Q000378:metabolism; D004277:DNA, Single-Stranded / Q000378:metabolism*; D009154:Mutation; D011995:Recombination, Genetic
chemical_list: D001426:Bacterial Proteins; D004269:DNA, Bacterial; D004277:DNA, Single-Stranded; D000251:Adenosine Triphosphatases; D004265:DNA Helicases