荧光假单胞菌中转录因子NodD2_7的功能研究
首发时间:2019-01-11
摘要:根瘤菌LysR家族转录因子NodD可以响应植物黄酮并调控相关基因。然而我们发现荧光假单胞菌中该蛋白的同源蛋白NodD2_7并不能结合芹菜素,根皮素,槲皮素这三种典型的植物黄酮。构建nodD2_7 基因敲除菌株并进行非标定量的全蛋白质组学实验 ,鉴定到1590个可定量蛋白 ,其中140发生显著变化。生物信息学分析表明该转录因子与多种生理过程相关,包括次生代谢合成与代谢,氨基酸合成与代谢,细胞分裂, I型 VI型分泌系统,运动性,生物膜生成,趋化性,氧化应激等。基于质谱数据的表型验证显示 ,NodD2_7可以显著正调控荧光假单胞菌的运动能力。?????
关键词: NodD2_7 蛋白 蛋白质组学 运动性
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Study on the function of the transcription factor NodD2_7 from Pseudomonas fluorescens
Abstract:It is reported that NodD in Rhizobia , belongs to LysR-type transcriptional factor , can respond to plant flavonoids and mediate related gene . While , we found the homologous protein NodD2_7 of the NodD in Pseudomonas fluorescens 2p24 can not bind to three typical flavonoids Apigenin , Phloretin and Quercetin . In order to investigate the function of NodD2_7 in P. fluorescens 2P24 , The gene knockout strains of nodD2_7 were constructed and a label-free quantitative proteomics experiment was carried out . Finally , 1590 proteins were identified , up to 140 of which changed significantly . These differentially expressed proteins fall into many functional categories , including secondary metabolites synthesis and metabolism , amino acid synthesis and metabolism , cell division , type I and VI secretion system , motility , biofilm formation , chemotaxis , oxidative stress and so on . Phenotypic verification according to mass spectrometry data shows that NodD2_7 can significantly activate the motility of P. fluorescens 2p24 .
Keywords: Protein NodD2_7 Proteomics Motility
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