AtCopeg1, the unique gene originated from AtCopia95 retrotransposon family, is sensitive to external hormones and abiotic stresses

文献类型： 外文期刊

第一作者： Duan, Ke

作者： Duan, Ke;Zhu, Hong;Pan, Aihu;Huang, Jianhua;Ding, Xiangzhen;Zhang, Qiong

作者机构：

关键词： Arabidopsis;Gene;copia retrotransposon;AtCopia95

期刊名称：PLANT CELL REPORTS （ 影响因子：4.57； 五年影响因子：4.463 ）

ISSN： 0721-7714

年卷期： 2008 年 27 卷 6 期

页码：

收录情况： SCI

摘要： Retrotransposons, the important component of eukaryotic genome, are seeds of evolution and play great role in creating new genes. The compact Arabidopsis genome harbors over 200 Copia-like retrotransposons, but mostly silent. Here we isolated an expressed gene AtCopeg1 (Copia evolved gene 1), which shows higher than 90% identity to AtCopia95_I, the consensus sequence encoding AtCopia95 polyprotein. AtCopeg1 is the unique gene evolved from AtCopia95 family. It is an intron-containing gene with two alternative 3' ends. The transcript accumulation of AtCopeg1 is tissue-specific, also significantly affected by external hormones and abiotic stresses. The presence of regulatory elements in its promoter region (originating from AtCopia95_I and AtCopia95 long terminal repeat), is adequate for conferring its essential expression feature. Thus, AtCopeg1 is a versatile functional gene involved in many developmental and adaptive processes probably including the signaling crosstalk of hormone and nutrient stress. Our work highlighted the role of transposable elements in creating new functional genes, and will incite the enthusiasm for isolation and functional characterization of plant genes evolved from those previously considered as selfish and junk DNA.

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