Mechanisms of DNA replication termination

Nat Rev Mol Cell Biol. 2017 Aug;18(8):507-516. doi: 10.1038/nrm.2017.42. Epub 2017 May 24.

Abstract

Genome duplication is carried out by pairs of replication forks that assemble at origins of replication and then move in opposite directions. DNA replication ends when converging replication forks meet. During this process, which is known as replication termination, DNA synthesis is completed, the replication machinery is disassembled and daughter molecules are resolved. In this Review, we outline the steps that are likely to be common to replication termination in most organisms, namely, fork convergence, synthesis completion, replisome disassembly and decatenation. We briefly review the mechanism of termination in the bacterium Escherichia coli and in simian virus 40 (SV40) and also focus on recent advances in eukaryotic replication termination. In particular, we discuss the recently discovered E3 ubiquitin ligases that control replisome disassembly in yeast and higher eukaryotes, and how their activity is regulated to avoid genome instability.

Publication types

  • Review

MeSH terms

  • DNA / genetics*
  • DNA Replication / genetics
  • DNA Replication / physiology*
  • Escherichia coli / genetics
  • Genomic Instability / genetics
  • Genomic Instability / physiology
  • Saccharomyces cerevisiae / genetics

Substances

  • DNA