XB-ART-35590
Phys Rev Lett
2007 Mar 02;989:098105.
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How Xenopus laevis replicates DNA reliably even though its origins of replication are located and initiated stochastically.
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DNA replication in Xenopus laevis is extremely reliable, failing to complete before cell division no more than once in 10 000 times; yet replication origin sites are located and initiated stochastically. Using a model based on 1D theories of nucleation and growth and using concepts from extreme-value statistics, we derive the distribution of replication times given a particular initiation function. We show that the experimentally observed initiation strategy for Xenopus laevis meets the reliability constraint and is close to the one that requires the fewest resources of a cell.
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