論文

査読有り
2017年5月

Targeted DNA methylation in pericentromeres with genome editing-based artificial DNA methyltransferase

PLOS ONE
  • Taiga Yamazaki
  • Yu Hatano
  • Tetsuya Handa
  • Sakiko Kato
  • Kensuke Hoida
  • Rui Yamamura
  • Takashi Fukuyama
  • Takayuki Uematsu
  • Noritada Kobayashi
  • Hiroshi Kimura
  • Kazuo Yamagata
  • 全て表示

12
5
開始ページ
e0177764
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1371/journal.pone.0177764
出版者・発行元
PUBLIC LIBRARY SCIENCE

To study the impact of epigenetic changes on biological functions, the ability to manipulate the epigenetic status of certain genomic regions artificially could be an indispensable technology. "Epigenome editing" techniques have gradually emerged that apply TALE or CRISPR/Cas9 technologies with various effector domains isolated from epigenetic code writers or erasers such as DNA methyltransferase, 5-methylcytosine oxidase, and histone modification enzymes. Here we demonstrate that a TALE recognizing a major satellite, consisting of a repeated sequence in pericentromeres, could be fused with the bacterial CpG methyltransferase, SssI. ChIP-qPCR assays demonstrated that the fusion protein TALMaj-SssI preferentially bound to major chromosomal satellites in cultured cell lines. Then, TALMaj-SssI was expressed in fertilized mouse oocytes with hypomethylated major satellites (10-20% CpG islands). Bisulfite sequencing revealed that the DNA methylation status was increased specifically in major satellites (50-60%), but not in minor satellites or other repeat elements, such as Intracisternal A-particle (IAP) or long interspersed nuclear elements-1 (Line1) when the expression level of TALMaj-SssI is optimized in the cell. At a microscopic level, distal ends of chromosomes at the first mitotic stage were dramatically highlighted by the mCherry-tagged methyl CpG binding domain of human MBD1 (mCherry-MBD-NLS). Moreover, targeted DNA methylation to major satellites did not interfere with kinetochore function during early embryonic cleavages. Co-injection of dCas9 fused with SssI and guide RNA (gRNA) recognizing major satellite sequences enabled increment of the DNA methylation in the satellites, but a few off-target effects were also observed in minor satellites and retrotransposons. Although CRISPR can be applied instead of the TALE system, technical improvements to reduce off-target effects are required. We have demonstrated a new method of introducing DNA methylation without the need of other binding partners using the CpG methyltransferase, SssI.

リンク情報
DOI
https://doi.org/10.1371/journal.pone.0177764
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/28542388
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000401672400079&DestApp=WOS_CPL
ID情報
  • DOI : 10.1371/journal.pone.0177764
  • ISSN : 1932-6203
  • PubMed ID : 28542388
  • Web of Science ID : WOS:000401672400079

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