Global identification of Arabidopsis lncRNAs reveals the regulation of MAF4 by a natural antisense RNA

Xinyue Zhao, Jingrui Li, Bi Lian, Hanqing Gu, Yan Li () and Yijun Qi ()
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Xinyue Zhao: Center for Plant Biology, School of Life Sciences, Tsinghua University
Jingrui Li: Center for Plant Biology, School of Life Sciences, Tsinghua University
Bi Lian: Center for Plant Biology, School of Life Sciences, Tsinghua University
Hanqing Gu: Center for Plant Biology, School of Life Sciences, Tsinghua University
Yan Li: Center for Plant Biology, School of Life Sciences, Tsinghua University
Yijun Qi: Center for Plant Biology, School of Life Sciences, Tsinghua University

Nature Communications, 2018, vol. 9, issue 1, 1-12

Abstract: Abstract Long non-coding RNAs (lncRNAs) have emerged as important regulators of gene expression and plant development. Here, we identified 6,510 lncRNAs in Arabidopsis under normal or stress conditions. We found that the expression of natural antisense transcripts (NATs) that are transcribed in the opposite direction of protein-coding genes often positively correlates with and is required for the expression of their cognate sense genes. We further characterized MAS, a NAT-lncRNA produced from the MADS AFFECTING FLOWERING4 (MAF4) locus. MAS is induced by cold and indispensable for the activation of MAF4 transcription and suppression of precocious flowering. MAS activates MAF4 by interacting with WDR5a, one core component of the COMPASS-like complexes, and recruiting WDR5a to MAF4 to enhance histone 3 lysine 4 trimethylation (H3K4me3). Our study greatly extends the repertoire of lncRNAs in Arabidopsis and reveals a role for NAT-lncRNAs in regulating gene expression in vernalization response and likely in other biological processes.

Date: 2018
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DOI: 10.1038/s41467-018-07500-7

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