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. 1984 Apr 11;12(7):3321–3332. doi: 10.1093/nar/12.7.3321

Initiation signals for complementary strand DNA synthesis in the region of the replication origin of the Escherichia coli chromosome.

A R Stuitje, P J Weisbeek, M Meijer
PMCID: PMC318748  PMID: 6326057

Abstract

We have used an in vivo plasmid-phi X174 packaging system to detect replication initiation signals in the region of the replication origin (oriC) of the Escherichia coli chromosome. The results obtained are summarized as follows: (i) Neither within nor close to oriC effective signals for initiating complementary strand synthesis could be detected. We conclude that initiation mechanisms for leading and lagging strand synthesis at oriC are not identical to any known priming mechanism of DNA synthesis. (ii) At least five signals that can function as complementary strand origins on ss-plasmid DNA are located in a region about 2000-3300 base pairs away from oriC in the clockwise direction on the chromosome. We suggest that these signals are protein n' like recognition sequences since they are dependent for their activity on dnaB protein and show sequence similarities to other putative n' recognition sequences. Surprisingly, some of the signals are located on the template for leading strand synthesis.

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Selected References

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