PMID:10455182

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Citation

Liu, J and Marians, KJ (1999) PriA-directed assembly of a primosome on D loop DNA. J. Biol. Chem. 274:25033-41

Abstract

Escherichia coli strains carrying null mutations in priA are chronically induced for the SOS response and are defective in homologous recombination, repair of UV damaged DNA, double-strand break repair, and both induced and constitutive stable DNA replication. This led to the proposal that PriA directed replication fork assembly at D loops formed by the homologous recombination machinery. The demonstration that PriA specifically recognized and bound D loop DNA supported this hypothesis. Using DNA footprinting as an assay, we show here that PriA also directs the assembly of a varphiX174-type primosome on D loop DNA. The ability to load a complete primosome on D loop DNA is a step necessary for replication fork assembly.

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Keywords

Adenosine Triphosphatases/genetics; Adenosine Triphosphatases/metabolism; Base Sequence; DNA/chemistry; DNA Footprinting; DNA Helicases/metabolism; DNA Replication; DNA, Single-Stranded/metabolism; DNA-Binding Proteins/metabolism; Deoxyribonuclease I; Electrophoresis, Polyacrylamide Gel; Escherichia coli Proteins; Molecular Sequence Data; Nucleic Acid Conformation; Recombination, Genetic; Single-Strand Specific DNA and RNA Endonucleases

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