文献类型： 外文期刊
作者： Li, Juzuo 1 ; Li, Ning 1 ; Zhu, Ling 1 ; Zhang, Zhibin 1 ; Li, Xiaochong 1 ; Wang, Jinbin 1 ; Xun, Hongwei 2 ; Zhao, Jing 1 ;
作者机构： 1.Northeast Normal Univ, Key Lab Mol Epigenet, Minist Educ MOE, Changchun 130024, Peoples R China
2.Jilin Acad Agr Sci, Jilin Prov Key Lab Agr Biotechnol, Changchun 130033, Peoples R China
3.Liaoning Univ, Sch Life Sci, Lab Plant Epigenet & Evolut, Shenyang 110036, Peoples R China
4.Jilin Agr Univ, Engn Res Ctr, Minist Educ MOE Edible & Med Fungi, Changchun 130118, Jilin, Peoples R China
关键词： long non-coding RNAs (lncRNAs); DNA methylation; transposable element; OsMET1-2; small interference RNA (siRNA); RNA-directed DNA methylation (RdDM)
期刊名称：G3-GENES GENOMES GENETICS （ 影响因子：2.781； 五年影响因子：3.026 ）
ISSN： 2160-1836
年卷期： 2021 年 11 卷 4 期
页码：
收录情况： SCI
摘要： Plant long non-coding RNAs (lncRNAs) function in diverse biological processes, and IncRNA expression is under epigenetic regulation, including by cytosine DNA methylation. However, it remains unclear whether 5-methylcytosine (C-5m) plays a similar role in different sequence contexts (CG, CHG, and CHH). In this study, we characterized and compared the profiles of genome-wide lncRNA profiles (including long intergenic non-coding RNAs [lincRNAs] and long noncoding natural antisense transcripts [lncNATs]) of a null mutant of the rice DNA methyltransferase 1, OsMET1-2 (designated OsMET1-2(-/)(-)) and its isogenic wild type (OsMET1-2(+/+)). The En/Spm transposable element (TE) family, which was heavily methylated in OsMET1-2(+/+), was transcriptionally de-repressed in OsMET1-2(-/-) due to genome-wide erasure of CG methylation, and this led to abundant production of specific lncRNAs. In addition, RdDM-mediated CHH hypermethylation was increased in the 5'-upstream genomic regions of lncRNAs in OsMET1-2(-/)(-). The positive correlation between the expression of lincRNAs and that of their proximal protein-coding genes was also analyzed. Our study shows that CG methylation negatively regulates the TE-related expression of lncRNA and demonstrates that CHH methylation is also involved in the regulation of lncRNA expression.
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