Li, Y., Mukherjee, I., Thum, K. E., Tanurdzic, M., Katari, M. S., Obertello, M., Edwards, M. B., McCombie, W. R., Martienssen, R. A., Coruzzi, G. M. (April 2015) The histone methyltransferase SDG8 mediates the epigenetic modification of light and carbon responsive genes in plants. Genome Biology, 16 (1). p. 79. ISSN 1474-7596
Abstract
BACKGROUND: Histone methylation modifies the epigenetic state of target genes to regulate gene expression in the context of developmental and environmental changes. Previously, we used a positive genetic screen to identify an Arabidopsis mutant, cli186, which was impaired in carbon and light signaling. Here, we report a deletion of the Arabidopsis histone methyltransferase SDG8 in this mutant (renamed sdg8-5), which provides a unique opportunity to study the global function of a specific histone methyltransferase within a multicellular organism. RESULTS: To assess the specific role of SDG8, we examine how the global histone methylation patterns and transcriptome were altered in the sdg8-5 deletion mutant compared to wild-type, within the context of transient light and carbon treatments. Our results reveal that the sdg8 deletion is associated with a significant reduction of H3K36me3, preferentially towards the 3' end of the gene body, accompanied by a reduction in gene expression. We uncover 728 direct targets of SDG8 that have altered methylation in the sdg8-5 mutant and are also bound by SDG8. As a group, this set of SDG8 targets is enriched in specific biological processes including defense, photosynthesis, nutrient metabolism and energy metabolism. Importantly, 64% of these SDG8 targets are responsive to light and/or carbon signals. CONCLUSIONS: The histone methyltransferase SDG8 functions to regulate the H3K36 methylation of histones associated with gene bodies in Arabidopsis. The H3K36me3 mark in turn is associated with high-level expression of a specific set of light and/or carbon responsive genes involved in photosynthesis, metabolism and energy production.
| Item Type: | Paper |
|---|---|
| Subjects: | organism description > plant > Arabidopsis bioinformatics > genomics and proteomics > genetics & nucleic acid processing > epigenetics bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > epigenetics bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein methylation > histone methylation |
| CSHL Authors: | |
| Communities: | CSHL labs > Martienssen lab CSHL labs > McCombie lab |
| Depositing User: | Matt Covey |
| Date: | 19 April 2015 |
| Date Deposited: | 07 May 2015 14:27 |
| Last Modified: | 15 Jul 2021 19:59 |
| PMCID: | PMC4464704 |
| Related URLs: | |
| URI: | https://repository.cshl.edu/id/eprint/31492 |
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