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首页> 外文期刊>Plant Cell Reports >Arabidopsis HRE1 alpha, a splicing variant of AtERF73/HRE1, functions as a nuclear transcription activator in hypoxia response and root development
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Arabidopsis HRE1 alpha, a splicing variant of AtERF73/HRE1, functions as a nuclear transcription activator in hypoxia response and root development

机译：拟南芥HRE1 alpha，AtERF73 / HRE1的剪接变体，在缺氧反应和根发育中充当核转录激活因子

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摘要

HRE1 alpha shows transcriptional activation activity in its C-terminal region via GCC box but not DRE/CRT and plays an important role in root development via root meristem cell division regulation. AtERF73/HRE1 protein, a member of the Arabidopsis AP2/ERF family, contains a conserved AP2/ERF DNA-binding domain. Here, we studied the molecular function of HRE1 alpha, a splicing variant of AtERF73/HRE1, as well as its role in root development. HRE1 alpha-overexpressing transgenic plants (OXs) showed tolerance to submergence. HRE1 alpha showed transcriptional activation activity via GCC box but not DRE/CRT. The 121-211 aa region of HRE1 alpha was responsible for the transcriptional activation activity, and the region was conserved among homologs of other species but was not found in other Arabidopsis proteins. HRE1 alpha OXs showed increased primary root length due to elevated root cell division. Our results suggest that HRE1 alpha functions as a transcription activator in the nucleus, and plays an important role in root development through regulation of root meristem cell division
机译：HRE1 alpha通过GCC盒在其C端区域显示转录激活活性，但不通过DRE / CRT显示，并在通过根分生组织细胞分裂调控的根发育中发挥重要作用。拟南芥AP2 / ERF家族的成员AtERF73 / HRE1蛋白包含一个保守的AP2 / ERF DNA结合结构域。在这里，我们研究了AtERF73 / HRE1的剪接变体HRE1 alpha的分子功能及其在根发育中的作用。 HRE1α过表达的转基因植物（OXs）显示出对淹没的耐受性。 HRE1 alpha通过GCC盒显示转录激活活性，但不显示DRE / CRT。 HRE1α的121-211aa区域负责转录激活活性，该区域在其他物种的同源物中是保守的，但在其他拟南芥蛋白中未发现。 HRE1 alpha OXs显示由于根细胞分裂增加而增加了初级根的长度。我们的结果表明，HRE1 alpha在细胞核中起着转录激活剂的作用，并且通过调节根分生组织的细胞分裂在根的发育中发挥重要作用

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