DNA methylation and histone modifications: teaming up to silence genes

Curr Opin Genet Dev. 2005 Oct;15(5):490-5. doi: 10.1016/j.gde.2005.08.002.


DNA methylation, histone deacetylation, and methylation of histone H3 at lysine 9 are the three best-characterized covalent modifications associated with a repressed chromatin state. Recent advances highlight an essential, intricate web of interactions among these processes, generating a self-reinforcing, self-perpetuating cycle of epigenetic events that lead to long-term transcriptional repression. Histone deacetylation and methylation at lysine 9 of H3 might also contribute to the establishment of DNA methylation patterns, a long-standing mystery in epigenetics. What's more, recent clues suggest a potential link between CpG methylation and other histone modifications. A complex picture is emerging in which DNA methylation and histone modifications work hand-in-hand as parts of an epigenetic program that integrates gene-silencing networks within the cell.

Publication types

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

MeSH terms

  • Animals
  • CpG Islands
  • DNA Methylation*
  • Gene Silencing*
  • Histones / metabolism*


  • Histones