Functional characterization of rice CW-domain containing zinc finger proteins involved in histone recognition

文献类型： 外文期刊

第一作者： Zhang, Zhe

作者： Zhang, Zhe;Zhang, Feng;Cheng, Zhi-jun;Lin, Qi-bing;Wu, Fu-qing;Wang, Jiu-lin;Wang, Jie;Guo, Xiu-ping;Zhang, Xin;Lei, Cal-lin;Zhao, Zhi-chao;Zhu, Shan-shan;Wan, Jian-min;Liu, Ling-long;Zhang, Huan;Wan, Jian-min

作者机构：

关键词： Histone recognition;CW domain;Zinc finger;Histone methylation;Oryza sativa

期刊名称：PLANT SCIENCE （ 影响因子：4.729； 五年影响因子：5.132 ）

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收录情况： SCI

摘要： Histone recognition is important for understanding the mechanisms of histone modification, which play a pivotal role in transcriptional regulation during plant development. Here, we identified three cysteine-tryptophan (CW)-domain containing zinc finger (ZF) proteins involved in histone recognition, namely OsCW-ZF3, OsCW-ZF5 and OsCW-ZF7. Protein sequence analysis showed that they have two unknown motifs in addition to the CW domain. All three OsCW-ZFs were expressed in aerial tissues, with relatively high levels in developing panicles. Subcellular localization revealed that the OsCW-ZFs target the cell nucleus and CW domains are not necessary for their nuclear localization. In contrast to OsCW-ZF3 and OsCW-ZF5 where the CW domains bind histone H3 lysine 4 with different methylated forms (H3K4me), the CW domain from OsCW-ZF7 recognizes only trimethylated histone H3 lysine 4 (H3K4me3). Analysis of mutant suggested that three conserved tryptophan residues in the CW domain are essential for binding to H3K4me. Further study found that OsCW-ZF7 interacts with TAFII20, a transcription initiation factor TFIID 20 kDa subunit. Knockout of OsCW-ZF7 caused defective development of awns. This study provides new insights into our understanding of the CW domain and lays a foundation for further investigation of its roles in rice.

分类号： Q94

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