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- W2017802952 abstract "Studies to elucidate the reactions that occur at the eukaryotic replication fork have been limited by the model systems available. We have established a method for isolating and characterizing Simian Virus 40 (SV40) replication complexes. SV40 rolling circle complexes are isolated using paramagnetic beads and then incubated under replication conditions to obtain continued elongation. In rolling circle replication, the normal mechanism for termination of SV40 replication does not occur and the elongation phase of replication is prolonged. Thus, using this assay system, elongation phase reactions can be examined in the absence of initiation or termination. We show that the protein requirements for elongation of SV40 rolling circles are equivalent to complete SV40 replication reactions. The DNA produced by SV40 rolling circles is doublestranded, unmethylated and with a much longer length than the template DNA. These properties are similar to those of physiological replication forks. We show that proteins associated with the isolated rolling circles, including SV40 T antigen, DNA polymerase α, replication protein A (RPA) and RF-C, are necessary for continued DNA synthesis. PCNA is also required but is not associated with the isolated complexes. We present evidence suggesting that synthesis of the leading and lagging strands are co-ordinated in SV40 rolling circle replication. We have used this system to show that both RPA-protein and RPA-DNA interactions are important for RPA's function in elongation." @default.
- W2017802952 created "2016-06-24" @default.
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- W2017802952 date "1999-01-01" @default.
- W2017802952 modified "2023-10-10" @default.
- W2017802952 title "A novel assay for examining the molecular reactions at the eukaryotic replication fork: activities of replication protein A required during elongation" @default.
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- W2017802952 doi "https://doi.org/10.1093/nar/27.2.656" @default.
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