Cloning and functional analysis prohibitins protein-coding gene EuPHB1 in Eucommia ulmoides Oliver
文献类型： 外文期刊
作者： Xu, Ting 1 ; Zhao, Degang 2 ;
作者机构： 1.Guizhou Univ, Inst Agrobioengn, Coll Life Sci, Key Lab Plant Resource Conservat & Germplasm Innov, Guiyang 550025, Peoples R China
2.Guizhou Acad Agr Sci, Biotechnol Inst Guizhou, Guizhou Plant Conservat Technol Ctr, Guiyang 550006, Peoples R China
关键词： Eucommia ulmoides Oliver; EuPHB1; Transgenic tobacco; Signal transduction; ATP
期刊名称：GENE （ 影响因子：3.5； 五年影响因子：3.3 ）
ISSN： 0378-1119
年卷期： 2023 年 888 卷
页码：
收录情况： SCI
摘要： As multifunctional proteins, prohibitins(PHBs) participate in many cellular processes and play essential roles in organisms. In this study, using rapid amplification of cDNA end (RACE) technology, EuPHB1 was cloned from Eucommia ulmoides Oliver (E. ulmoides). A subcellular localization assay preliminarily located EuPHB1 in mitochondria. Then EuPHB1 was transformed into tobacco, and phenotype analyses showed that overexpression of EuPHB1 caused leaves to become chlorotic and shrivel. Furthermore, genes related to hormone and auxin signal transduction, auxin binding, and transport, such as ethylene-responsive transcription factor CRF4-like and ABC transporter B family member 11-like, were significantly inhibited in response to EuPHB1 overexpression. Its overexpression disturbs the original signal transduction pathway, thus causing the corresponding phenotypic changes in transgenic tobacco. Indeed, such overexpression caused fading of palisade tissue and an increase in the number of certain mesophyll cells. It also increased adenosine triphosphate (ATP) synthase activity, mitochondrial membrane potential, ATP content, and reactive oxygen species (ROS) levels in cells. Our results suggest that EuPHB1 expression promotes cellular energy metabolism by accelerating the oxidative phosphorylation of the mitochondrial respiratory chain. Elevated levels of EuPHB1 in the mitochondria, which helps supply the extra energy required to support rapid rates of cell division.
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