Casein Kinase 2 Mediates Degradation of Transcription Factor Pcf1 during Appressorium Formation in the Rice Blast Fungus

文献类型： 外文期刊

第一作者： Huang, Pengyun

作者： Huang, Pengyun;Li, Yan;Wang, Jing;Wang, Qing;Huang, Zhicheng;Lu, Jianping;Liu, Xiaohong;Lin, Fucheng;Lin, Fucheng

作者机构：

关键词： Magnaporthe oryzae; casein kinase 2; transcription factor; protein degradation; appressorium; rice blast

期刊名称：JOURNAL OF FUNGI （ 影响因子：5.724； 五年影响因子：6.413 ）

ISSN：

年卷期： 2022 年 8 卷 2 期

页码：

收录情况： SCI

摘要： The appressorium is a specialized structure that is differentiated from Magnaporthe oryzae spores that can infect host cells. In the process of cellular transformation from spore to appressorium, the contents inside the spores are transferred into appressoria, accompanied by major differences in the gene expression model. In this study, we reported a transcription factor (TF), Pcf1, which was depressed at the transcription level and degraded at the protein level in nuclei of incipient appressoria at four hpi (hours post inoculation). To investigate its degradation mechanism, the interacting proteins of Pcf1 were identified using an immunoprecipitation-mass spectrometry (IP-MS) assay. Yeast two-hybrid (Y2H) and co-IP (co-immunoprecipitation) assays confirmed that Pcf1 interacted with the casein kinase 2 (CK2) holoenzyme through direct combination with the CKb2 subunit. Moreover, Pcf1 was ubiquitinated in the hyphae. These changes in Pcf1 protein levels in nuclei provide a new clue of how TFs are degraded during appressorium formation: temporarily unnecessary TFs in spores are phosphorylated through interacting with CK2 enzyme and are then ubiquitinated and digested by the ubiquitin proteasome system (UPS).

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序