The dual role of autonomously replicating sequences as origins of replication and as silencers

Curr Genet. 2009 Aug;55(4):357-63. doi: 10.1007/s00294-009-0265-7. Epub 2009 Jul 26.

Abstract

Autonomously replicating sequences (ARSs) in Saccharomyces cerevisiae have been extensively characterized as both origins of DNA replication and as chromatin repressors/silencers. It has been conclusively shown that the origin and the silencer activities of ARS are substantially, but not entirely interchangeable and that they are modulated by position effects and chromatin environment. It remains unclear how these two quite divergent functions of ARS co-exist. This perspective focuses on recent advances, which have shown that slight differences in ARSs can modulate their affinity for origin recognition complex and their activity as silencers or origins.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Base Sequence
  • Chromatin / genetics
  • Consensus Sequence
  • DNA Replication*
  • DNA, Fungal / genetics
  • DNA, Fungal / metabolism
  • Gene Silencing*
  • Genes, Fungal*
  • Models, Genetic
  • Molecular Sequence Data
  • Origin Recognition Complex / genetics
  • Origin Recognition Complex / metabolism
  • Replication Origin*
  • Saccharomyces cerevisiae / genetics
  • Saccharomyces cerevisiae / metabolism
  • Sequence Analysis, DNA
  • Sequence Homology, Nucleic Acid

Substances

  • Chromatin
  • DNA, Fungal
  • Origin Recognition Complex