Methylations of histone H3 lysine 9 and lysine 36 are functionally linked to DNA replication checkpoint control in fission yeast

Hyun Soo Kim, Dong Keun Rhee, Yeun Kyu Jang

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21 Citations (Scopus)


Recently, histone H4 lysine 20 and H3 lysine 79 methylations were functionally linked to DNA damage checkpoint. The crosstalk between histone methylation and the S-M checkpoint, however, has remained unclear. Here, we show that H3 lysine 9 (K9) and lysine 36 (K36) methylations catalyzed by two histone methyltransferases Clr4 and Set2 are involved in hydroxyurea (HU)-induced replication checkpoint. The clr4-set2 double mutants besides histone H3-K9 and K36 double mutants exhibited HU-sensitivity, a defective HU-induced S-M checkpoint, and a significant reduction of HU-induced phosphorylation of Cdc2. Intriguingly, the clr4-set2 double mutations impaired the HU-induced accumulation of a mitotic inhibitor Mik1. Double mutants in Alp13 and Swi6, which can specifically bind to H3-K36 and K9 methylations, exhibited phenotypes similar to those of the clr4-set2 mutants. Together, these findings suggest that methylations of histone H3-K9 and K36 by Clr4 and Set2 are functionally linked to DNA replication checkpoint via accumulation of Mik1.

Original languageEnglish
Pages (from-to)419-425
Number of pages7
JournalBiochemical and Biophysical Research Communications
Issue number2
Publication statusPublished - 2008 Apr 4


All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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