Arabidopsis SUMO E3 Ligase SIZ1 Interacts with HDA6 and Negatively Regulates HDA6 Function during Flowering
文献类型： 外文期刊
作者： Gao, Sujuan 1 ; Zeng, Xueqin 2 ; Wang, Jianhao 3 ; Xu, Yingchao 4 ; Yu, Chunwei 5 ; Huang, Yishui 4 ; Wang, Feng 2 ; Wu, Keqiang 5 ; Yang, Songguang 4 ;
作者机构： 1.Zhongkai Univ Agr & Engn, Coll Light Ind & Food Sci, Key Lab Green Proc & Intelligent Mfg Lingnan Spec, Minist Agr, Guangzhou 510225, Peoples R China
2.Guangdong Acad Agr Sci, Rice Res Inst, Guangdong Prov Key Lab New Technol Rice Breeding, Guangzhou 510640, Peoples R China
3.Guangzhou Univ, Innovat Ctr Mol Genet & Evolut, Sch Life Sci, Guangzhou 510000, Peoples R China
4.Chinese Acad Sci, Key Lab South China Agr Plant Mol Anal & Genet Im, Guangdong Prov Key Lab Appl Bot, South China Bot Garden, Guangzhou 510650, Peoples R China
5.Natl Taiwan Univ, Inst Plant Biol, Taipei 106, Taiwan
6.Guangdong Acad Agr Sci, Vegetable Res Inst, Guangdong Key Lab New Technol Res Vegetables, Guangzhou 510640, Peoples R China
关键词： HDA 6; SUMO E3 ligase SIZ1; flowering; Arabidopsis
期刊名称：CELLS （ 影响因子：7.666； 五年影响因子：7.677 ）
ISSN：
年卷期： 2021 年 10 卷 11 期
页码：
收录情况： SCI
摘要： The changes in histone acetylation mediated by histone deacetylases (HDAC) play a crucial role in plant development and response to environmental changes. Mammalian HDACs are regulated by post-translational modifications (PTM), such as phosphorylation, acetylation, ubiquitination and small ubiquitin-like modifier (SUMO) modification (SUMOylation), which affect enzymatic activity and transcriptional repression. Whether PTMs of plant HDACs alter their functions are largely unknown. In this study, we demonstrated that the Arabidopsis SUMO E3 ligase SAP AND MIZ1 DOMAIN-CONTAINING LIGASE1 (SIZ1) interacts with HISTONE DEACETYLASE 6 (HDA6) both in vitro and in vivo. Biochemical analyses indicated that HDA6 is not modified by SUMO1. Overexpression of HDA6 in siz1-3 background results in a decreased level of histone H3 acetylation, indicating that the activity of HDA6 is increased in siz1-3 plants. Chromatin immunoprecipitation (ChIP) assays showed that SIZ1 represses HDA6 binding to its target genes FLOWERING LOCUS C (FLC) and MADS AFFECTING FLOWERING 4 (MAF4), resulting in the upregulation of FLC and MAF4 by increasing the level of histone H3 acetylation. Together, these findings indicate that the Arabidopsis SUMO E3 ligase SIZ1 interacts with HDA6 and negatively regulates HDA6 function.
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