title: Association of phiX174 DNA-dependent ATPase activity with an Escherichia coli protein, replication factor Y, required for in vitro synthesis of phiX174 DNA.
abstract: phiX174 DNA-dependent DNA synthesis is catalyzed in vitro by the combination of at least 11 purified protein fractions: dnaB, dnaC(D), and dnaG gene products, DNA polymerase III, DNA elongation factors I and II, DNA binding protein, and replication factors W, X, Y, and Z. The reaction requires ATP, 4 dNTPs, and Mg+2 and is specific for phiX174 (or phiXahb) DNA. Purified replication factor Y contains phiX174 (or phiXahb) DNA-dependent ATPase (or dATPase) activity. The ATPase activity is poorly stimulated by other single-stranded DNA, by double-stranded DNA, or by RNA. The products of the phiX174 DNA-dependent ATPase activity of factor Y are Pi and ADP (or dADP). The association of phiX174 DNA-dependent ATPase activity with factor Y was shown in the following ways: (a) the two activities copurified with a constant ratio; (b) they comigrated on native polyacrylamide gel electrophoresis; (c) both activities were heat-inactivated at the same rate; and (d) both showed identical patterns of N-ethylmaleimide sensitivity.
mesh_terms: D000251:Adenosine Triphosphatases / Q000032:analysis / Q000037:antagonists & inhibitors / Q000378:metabolism*; D002474:Cell-Free System; D003090:Coliphages / Q000378:metabolism*; D004261:DNA Replication; D004279:DNA, Viral / Q000096:biosynthesis* / Q000494:pharmacology; D004789:Enzyme Activation; D004926:Escherichia coli / Q000201:enzymology*; D005033:Ethylmaleimide / Q000494:pharmacology; D006358:Hot Temperature
chemical_list: D004279:DNA, Viral; D000251:Adenosine Triphosphatases; D005033:Ethylmaleimide