SDG714, a histone H3K9 methyltransferase, is involved in Tos17 DNA methylation and transposition in rice
文献类型： 外文期刊
作者： Ding, Yong 1 ; Wang, Xia 2 ; Su, Lei 3 ; Zhai, JiXian; Cao, ShouYun; Zhang, DongFen; Liu, ChunYan; Bi, YuPing;
作者机构： 1.Chinese Acad Sci, State Key Lab Plant Genom, Beijing 100101, Peoples R China
2.Chinese Acad Sci, State Key Lab Plant Genom, Beijing 100101, Peoples R China; Chinese Acad Sci, Natl Ctr Plant Gene Res, Inst Genet & Dev Biol, Beijing 100101, Peoples R China; Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China; Shandong Acad Agr Sci, High Tech Res Ctr, Key Lab Genet Improvement Crop Anim & Poultry Sha, Jinan 250100, Peoples R China; Shandong Normal Univ, Coll Life Sci, Jinan 250014, Peoples R China; China Natl Rice Res Inst, State Key Lab Rice Biol, Hangzhou 310006, Peoples R China
3.Chinese Acad Sci, State Key Lab Plant Genom, Beijing 100101, Peoples R China; Chinese Acad Sci, Natl Ctr Plant Gene Res, Inst Genet & Dev Biol, Beijing 100101, Peoples R China; Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China; Shandong Acad Agr Sci, High Tech Res Ctr, Key Lab Genet Improvement Crop Anim & Poultry Sha, Jinan 250100, Peoples R China; Shandong Normal Univ, Coll Life Sci, Jinan 250014, Peoples R China; C
关键词： LOCUS-SPECIFIC CONTROL;ORYZA-SATIVA L.;RETROTRANSPOSON TOS17;TRANSPOSABLE ELEMENTS;LYSINE-9 METHYLATION;ARABIDOPSIS-THALIANA;NEUROSPORA-CRASSA;CPG METHYLATION;TISSUE-CULTURE;ACTIVE GENES
期刊名称：PLANT CELL （ 影响因子：11.277； 五年影响因子：12.061 ）
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收录情况： SCI
摘要： Although the role of H3K9 methylation in rice ( Oryza sativa) is unclear, in Arabidopsis thaliana the loss of histone H3K9 methylation by mutation of Kryptonite [ also known as SU(VAR)3-9 homolog] reduces genome-wide DNA methylation and increases the transcription of transposable elements. Here, we report that rice SDG714 ( for SET Domain Group Protein714) encodes a histone H3K9-specific methyltransferase. The C terminus of SDG714 confers enzymatic activity and substrate specificity, whereas the N terminus localizes it in the nucleus. Loss-of-function mutants of SDG714 (SDG714IR transformants) generated by RNA interference display a mostly glabrous phenotype as a result of the lack of macro trichomes in glumes, leaves, and culms compared with control plants. These mutants also show decreased levels of CpG and CNG cytosine methylation as well as H3K9 methylation at the Tos17 locus, a copia-like retrotransposon widely used for the generation of rice mutants. Most interestingly, loss of function of SDG714 can enhance transcription and cause the transposition of Tos17. Together, these results suggest that histone H3K9 methylation mediated by SDG714 is involved in DNA methylation, the transposition of transposable elements, and genome stability in rice.
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