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Transposon age and non-CG methylation

Nature communications, 2020-03, Vol.11 (1), p.1221-1221, Article 1221 [Peer Reviewed Journal]

This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;The Author(s) 2020 ;ISSN: 2041-1723 ;EISSN: 2041-1723 ;DOI: 10.1038/s41467-020-14995-6 ;PMID: 32144266

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Title:
Transposon age and non-CG methylation
Author: Wang, Zhengming ; Baulcombe, David C
Subjects: Age ; Arabidopsis ; Chromatin ; Chromatin - metabolism ; CRISPR-Cas Systems - genetics ; Deoxyribonucleic acid ; DNA ; DNA methylation ; DNA Methylation - genetics ; DNA methyltransferase ; DNA Transposable Elements - genetics ; Evolution, Molecular ; Gene expression ; Gene Silencing ; Long terminal repeat ; Lycopersicon esculentum - genetics ; Lycopersicon esculentum - growth & development ; Maintenance ; Mutation - genetics ; Nucleotides - genetics ; Phenotype ; Plant Proteins - metabolism ; Ribonucleic acid ; RNA ; RNA Polymerase II - metabolism ; Silence ; Terminal Repeat Sequences - genetics ; Tomatoes ; Transposons
Is Part Of: Nature communications, 2020-03, Vol.11 (1), p.1221-1221, Article 1221
Description: Silencing of transposable elements (TEs) is established by small RNA-directed DNA methylation (RdDM). Maintenance of silencing is then based on a combination of RdDM and RNA-independent mechanisms involving DNA methyltransferase MET1 and chromodomain DNA methyltransferases (CMTs). Involvement of RdDM, according to this model should decrease with TE age but here we show a different pattern in tomato and Arabidopsis. In these species the CMTs silence long terminal repeat (LTR) transposons in the distal chromatin that are younger than those affected by RdDM. To account for these findings we propose that, after establishment of primary RdDM as in the original model, there is an RNA-independent maintenance phase involving CMTs followed by secondary RdDM. This progression of epigenetic silencing in the gene-rich distal chromatin is likely to influence the transcriptome either in cis or in trans depending on whether the mechanisms are RNA-dependent or -independent.
Publisher: England: Nature Publishing Group
Language: English
Identifier: ISSN: 2041-1723
EISSN: 2041-1723
DOI: 10.1038/s41467-020-14995-6
PMID: 32144266
Source: AUTh Library subscriptions: ProQuest Central
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Transposon age and non-CG methylation

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