WHIRLY1 Occupancy Affects Histone Lysine Modification and WRKY53 Transcription in Arabidopsis Developmental Manner.

WHIRLY1 Occupancy Affects Histone Lysine Modification and WRKY53 Transcription in Arabidopsis Developmental Manner.
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WHIRLY1 占用影响拟南芥发育方式中的组蛋白赖氨酸修饰和 WRKY53 转录

DOI:
10.3389/fpls.2018.01503
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发表时间:
2018
影响因子:
5.6
通讯作者:
Miao Y
Miao Y
中科院分区:
生物学2区
文献类型:
--
作者:
Huang D;Lan W;Li D;Deng B;Lin W;Ren Y;Miao Y

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单链DNA结合蛋白(Single-stranded DNA binding proteins,SSB)被认为参与DNA复制、DNA修复和基因转录。在这里,我们提供了直接的证据上的功能的拟南芥SSB,WHIRLY 1,通过使用损失或获得的功能线。我们发现,WHIRLY 1结合到WRKY 53的启动子抑制了H3 K4 me 3的富集,但增强了H3 K9 ac在包含WHIRLY 1结合序列和TATA盒的区域或WRKY 53的翻译起始区域的富集,与RNAPII的募集相一致。体外ChIP实验证实,WHIRLY 1抑制H3 K4 me 3富集在preinitiation复合物形成阶段,而促进H3 K9 ac富集和RNAPII招募在延伸阶段,从而影响WRKY 53的转录。这些结果进一步探讨了SSB介导的基因转录通过表观遗传调控在植物衰老中的分子作用。
Single-stranded DNA-binding proteins (SSBs) are assumed to involve in DNA replication, DNA repairmen, and gene transcription. Here, we provide the direct evidence on the functionality of an Arabidopsis SSB, WHIRLY1, by using loss- or gain-of-function lines. We show that WHIRLY1 binding to the promoter of WRKY53 represses the enrichment of H3K4me3, but enhances the enrichment of H3K9ac at the region contained WHIRLY1-binding sequences and TATA box or the translation start region of WRKY53, coincided with a recruitment of RNAPII. In vitro ChIP assays confirm that WHIRLY1 inhibits H3K4me3 enrichment at the preinitiation complex formation stage, while promotes H3K9ac enrichment and RNAPII recruitment at the elongation stage, consequently affecting the transcription of WRKY53. These results further explore the molecular actions underlying SSB-mediated gene transcription through epigenetic regulation in plant senescence.
DOI: 10.1093/nar/gkr740
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