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Non-CG methylation patterns shape the epigenetic landscape in Arabidopsis

Open access
Stroud, Hume, Do, Truman, Du, Jiamu, Zhong, Xuehua, Feng, Suhua, Johnson, Lianna, Patel, Dinshaw J, Jacobsen, Steven E·2014·Nature Structural & Molecular Biology

Abstract

DNA methylation occurs in CG and non-CG sequence contexts. Non-CG methylation is abundant in plants and is mediated by CHROMOMETHYLASE (CMT) and DOMAINS REARRANGED METHYLTRANSFERASE (DRM) proteins; however, its roles remain poorly understood. Here we characterize the roles of non-CG methylation in Arabidopsis thaliana. We show that a poorly characterized methyltransferase, CMT2, is a functional methyltransferase in vitro and in vivo. CMT2 preferentially binds histone H3 Lys9 (H3K9) dimethylation and methylates non-CG cytosines that are regulated by H3K9 methylation. We revealed the contributions and redundancies between each non-CG methyltransferase in DNA methylation patterning and in regulating transcription. We also demonstrate extensive dependencies of small-RNA accumulation and H3K9 methylation patterning on non-CG methylation, suggesting self-reinforcing mechanisms between these epigenetic factors. The results suggest that non-CG methylation patterns are critical in shaping the landscapes of histone modification and small noncoding RNA.

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Metadata

Authors
Stroud, H., Do, T., Du, J., Zhong, X., Feng, S., Johnson, L., Patel, D. J., & Jacobsen, S. E.
Venue
Nature Structural & Molecular Biology
Published
2013-12-15
Volume
21
Issue
1
Pages
64-72
ISSN
  • 1545-9985 (ISSN-L)
  • 1545-9993
OpenAlex
W2016813268
Cited by
907
References
41
FWCI
18.56
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Non-CG methylation patterns shape the epigenetic landscape in Arabidopsis. https://app.cochat.ai/papers/10.1038/nsmb.2735
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Stroud, H., Do, T., Du, J., Zhong, X., Feng, S., Johnson, L., Patel, D. J., & Jacobsen, S. E. (2014). Non-CG methylation patterns shape the epigenetic landscape in Arabidopsis. Nature Structural & Molecular Biology. https://doi.org/10.1038/nsmb.2735

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