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  AtHDA6 functions as an H3K18ac eraser to maintain pericentromeric CHG methylation in Arabidopsis thaliana

Wang, Q., Bao, X., Chen, S., Zhong, H., Liu, Y., Zhang, L., et al. (2021). AtHDA6 functions as an H3K18ac eraser to maintain pericentromeric CHG methylation in Arabidopsis thaliana. Nucleic Acids Research, 49(17), 9755-9767. doi:10.1093/nar/gkab706.

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Wang, Qianwen1, Author
Bao, Xiucong1, Author
Chen, Shengjie1, Author
Zhong, Huan1, Author
Liu, Yaqin1, Author
Zhang, Li1, Author
Xia, Yiji1, Author
Kragler, F.2, Author              
Luo, Ming1, Author
Li, Xiang David1, Author
Lam, Hon-Ming1, Author
Zhang, Shoudong1, Author
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1External Organizations, ou_persistent22              
2Intercellular Macromolecular Transport, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753331              

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 Abstract: Pericentromeric DNA, consisting of high-copy-number tandem repeats and transposable elements, is normally silenced through DNA methylation and histone modifications to maintain chromosomal integrity and stability. Although histone deacetylase 6 (HDA6) has been known to participate in pericentromeric silencing, the mechanism is still yet unclear. Here, using whole genome bisulfite sequencing (WGBS) and chromatin immunoprecipitation-sequencing (ChIP-Seq), we mapped the genome-wide patterns of differential DNA methylation and histone H3 lysine 18 acetylation (H3K18ac) in wild-type and hda6 mutant strains. Results show pericentromeric CHG hypomethylation in hda6 mutants was mediated by DNA demethylases, not by DNA methyltransferases as previously thought. DNA demethylases can recognize H3K18ac mark and then be recruited to the chromatin. Using biochemical assays, we found that HDA6 could function as an ‘eraser’ enzyme for H3K18ac mark to prevent DNA demethylation. Oxford Nanopore Technology Direct RNA Sequencing (ONT DRS) also revealed that hda6 mutants with H3K18ac accumulation and CHG hypomethylation were shown to have transcriptionally active pericentromeric DNA.

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Language(s): eng - English
 Dates: 2021-09-27
 Publication Status: Published in print
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 Identifiers: DOI: 10.1093/nar/gkab706
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Title: Nucleic Acids Research
  Other : Nucleic Acids Res.
Source Genre: Journal
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Pages: - Volume / Issue: 49 (17) Sequence Number: - Start / End Page: 9755 - 9767 Identifier: ISSN: 0301-5610
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000262810