Abstract
To identify regulators involved in determining the differential pattern of H3K79 methylation by Dot1, we screened the entire yeast gene deletion collection by GPS for genes required for normal levels of H3K79 di- but not trimethylation. We identified the cell cycle-regulated SBF protein complex required for H3K79 dimethylation. We also found that H3K79 di- and trimethylation are mutually exclusive, with M/G1 cell cycle-regulated genes significantly enriched for H3K79 dimethylation. Since H3K79 trimethylation requires prior monoubiquitination of H2B, we performed genome-wide profiling of H2BK123 monoubiquitination and showed that H2BK123 monoubiquitination is not detected on cell cycle-regulated genes and sites containing H3K79me2, but is found on H3K79me3-containing regions. A screen for genes responsible for the establishment/removal of H3K79 dimethylation resulted in identification of NRM1 and WHI3, both of which impact the transcription by the SBF and MBF protein complexes, further linking the regulation of methylation status of H3K79 to the cell cycle.
Original language | English (US) |
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Pages (from-to) | 626-641 |
Number of pages | 16 |
Journal | Molecular cell |
Volume | 35 |
Issue number | 5 |
DOIs | |
State | Published - Sep 11 2009 |
Funding
We thank Edwin Smith for critical reading of this manuscript and Laura Shilatifard for editorial assistance. Furthermore, we thank Raphael Gottardo for providing the MAT package to analyze the ChIP-on-chip data, Hunter Fraser for help with the statistical analysis, and Frank Holstege and Harm van Bakel for detailed ChIP-on-chip protocols using double-round T7 amplification. J.M.S. is supported by a fellowship from the German Academic Exchange Service and a graduate studentship from the Child and Family Research Institute. M.S.K. is a Scholar of the Michael Smith Foundation for Health Research and the Canadian Institute for Advanced Research. Research for this study in the laboratory of M.S.K. was supported by an operating grant from the Canadian Institute of Health Research (MOP-79442). S.N. is a Fellow of the Leukemia and Lymphoma Society. The work in Shilatifard's laboratory was supported by a grant from the National Institute of Health (GM069905) to A.S.H.
Keywords
- CELLCYCLE
- DNA
- PROTEINS
ASJC Scopus subject areas
- Molecular Biology
- Cell Biology