TCH4基因在植物次生生长、疾病抵抗和逆境适应方面具有重要作用, 能被多种激素、环境和机械信号诱导表达。利用拟南芥TCH4的直系同源基因和芯片数据进行了启动子序列分析, 结果共识别出9个转录调控元件。它们均包含有已知元件序列, 并且在部分共表达基因和对应的直系同源基因启动子中排列顺序一致。根据已有TCH4基因启动子研究, 其中4个已被报道, 另5个为本研究新发现。根据预测结果进行知识整合, 构建了TCH4基因转录调控机制模型。

Arabidopsis TCH4 gene plays an important role in the biological processes related to plant secondary growth, resistance to pathogen, and adaptation to environmental stresses. It is up-regulated by various hormonal, environmental, and mechanical stimuli. Here, we identified 9 transcriptional regulatory elements from TCH4 promoter by bioinformatics approach. In which, 4 elements have been reported previously, and 5 elements are newly identified in this study. All of the identified elements contain the sequences of known cis-elements. Especially, their distribution along some co-expressed gene promoters and the orthologous promoters is typically clustered and syntenic. Based on our predictions and the information of known cis-elements, a model representing the transcriptional regulation mechanism was proposed for TCH4 gene in re-sponse to hormonal, mechanical, and environmental stimuli.