title: Deletion mutants defining the Escherichia coli replication factor Y effector site sequences in pBR322 DNA.
abstract: The Escherichia coli DNA replication factor Y, along with other genetically undefined replication proteins, is involved in a dnaB-, dnaC-, and dnaG-dependent pathway of primer formation on phi X174 single-stranded circular DNA. In addition, replication factor Y has a site-specific, single-stranded DNA-dependent ATPase activity. We have previously demonstrated the presence of two factor Y effector sites on pBR322 DNA. When inserted into the filamentous phage f1R229, these sites can function as rifampicin-resistant dnaB-, dnaC-, and dnaG-dependent origins of DNA replication. We report here the construction of deletion mutants of the two pBR322 factor Y effector sites. These deleted sites no longer function as effectors for factor Y ATPase activity nor as templates for rifampicin-resistant dnaB-, dnaC-, and dnaG-dependent DNA synthesis. We conclude that the DNA sequences required for factor Y ATPase activity and origin function are likely to be identical.
mesh_terms: D000251:Adenosine Triphosphatases / Q000235:genetics*; D001426:Bacterial Proteins / Q000235:genetics*; D001483:Base Sequence; D002872:Chromosome Deletion; D004265:DNA Helicases; D004261:DNA Replication; D053488:DnaB Helicases; D004926:Escherichia coli / Q000235:genetics*; D009154:Mutation; D013329:Structure-Activity Relationship
chemical_list: D001426:Bacterial Proteins; D000251:Adenosine Triphosphatases; C506730:dnaB protein, E coli; D004265:DNA Helicases; D053488:DnaB Helicases