Gene-body CG methylation and divergent expression of duplicate genes in rice

Abstract Gene and genome duplication fosters genetic novelty, but redundant gene copies would undergo mutational decay unless preserved via selective or neutral forces. Molecular mechanisms mediating duplicate preservation remain incompletely understood. Several recent studies showed an association...

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Autores principales:	Xutong Wang, Zhibin Zhang, Tiansi Fu, Lanjuan Hu, Chunming Xu, Lei Gong, Jonathan F. Wendel, Bao Liu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5be6f0b03ef54b2fb5e08140beee3f62
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spelling	oai:doaj.org-article:5be6f0b03ef54b2fb5e08140beee3f622021-12-02T16:06:51ZGene-body CG methylation and divergent expression of duplicate genes in rice10.1038/s41598-017-02860-42045-2322https://doaj.org/article/5be6f0b03ef54b2fb5e08140beee3f622017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02860-4https://doaj.org/toc/2045-2322Abstract Gene and genome duplication fosters genetic novelty, but redundant gene copies would undergo mutational decay unless preserved via selective or neutral forces. Molecular mechanisms mediating duplicate preservation remain incompletely understood. Several recent studies showed an association between DNA methylation and expression divergence of duplicated genes and suggested a role of epigenetic mechanism in duplicate retention. Here, we compare genome-wide gene-body CG methylation (BCGM) and duplicate gene expression between a rice mutant null for OsMet1-2(a major CG methytransferase in rice) and its isogenic wild-type. We demonstrate a causal link between BCGM divergence and expression difference of duplicate copies. Interestingly, the higher- and lower-expressing copies of duplicates as separate groups show broadly different responses with respect to direction of expression alteration upon loss of BCGM. A role for BCGM in conditioning expression divergence between copies of duplicates generally holds for duplicates generated by whole genome duplication (WGD) or by small-scale duplication processes. However, differences are evident among these categories, including a higher proportion of WGD duplicates manifesting expression alteration, and differential propensities to lose BCGM by the higher- and lower-expression copies in the mutant. Together, our results support the notion that differential epigenetic marking may facilitate long-term retention of duplicate genes.Xutong WangZhibin ZhangTiansi FuLanjuan HuChunming XuLei GongJonathan F. WendelBao LiuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xutong Wang Zhibin Zhang Tiansi Fu Lanjuan Hu Chunming Xu Lei Gong Jonathan F. Wendel Bao Liu Gene-body CG methylation and divergent expression of duplicate genes in rice
description	Abstract Gene and genome duplication fosters genetic novelty, but redundant gene copies would undergo mutational decay unless preserved via selective or neutral forces. Molecular mechanisms mediating duplicate preservation remain incompletely understood. Several recent studies showed an association between DNA methylation and expression divergence of duplicated genes and suggested a role of epigenetic mechanism in duplicate retention. Here, we compare genome-wide gene-body CG methylation (BCGM) and duplicate gene expression between a rice mutant null for OsMet1-2(a major CG methytransferase in rice) and its isogenic wild-type. We demonstrate a causal link between BCGM divergence and expression difference of duplicate copies. Interestingly, the higher- and lower-expressing copies of duplicates as separate groups show broadly different responses with respect to direction of expression alteration upon loss of BCGM. A role for BCGM in conditioning expression divergence between copies of duplicates generally holds for duplicates generated by whole genome duplication (WGD) or by small-scale duplication processes. However, differences are evident among these categories, including a higher proportion of WGD duplicates manifesting expression alteration, and differential propensities to lose BCGM by the higher- and lower-expression copies in the mutant. Together, our results support the notion that differential epigenetic marking may facilitate long-term retention of duplicate genes.
format	article
author	Xutong Wang Zhibin Zhang Tiansi Fu Lanjuan Hu Chunming Xu Lei Gong Jonathan F. Wendel Bao Liu
author_facet	Xutong Wang Zhibin Zhang Tiansi Fu Lanjuan Hu Chunming Xu Lei Gong Jonathan F. Wendel Bao Liu
author_sort	Xutong Wang
title	Gene-body CG methylation and divergent expression of duplicate genes in rice
title_short	Gene-body CG methylation and divergent expression of duplicate genes in rice
title_full	Gene-body CG methylation and divergent expression of duplicate genes in rice
title_fullStr	Gene-body CG methylation and divergent expression of duplicate genes in rice
title_full_unstemmed	Gene-body CG methylation and divergent expression of duplicate genes in rice
title_sort	gene-body cg methylation and divergent expression of duplicate genes in rice
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/5be6f0b03ef54b2fb5e08140beee3f62
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Gene-body CG methylation and divergent expression of duplicate genes in rice

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