The cytidine repressor regulates the survival of Pantoea agglomerans YS19 under oxidative stress and sulfur starvation conditions

The Journal of General and Applied Microbiology

article

Jiajia Yu¹  Mengqi Jia¹  Yongjun Feng¹ 

[1] School of Life Science, Beijing Institute of Technology

关键词: AhpC;    CytR;    indole;    Pantoea agglomerans;    stress resistance;   

DOI  :  10.2323/jgam.2020.07.001

学科分类：微生物学和免疫学

来源: Applied Microbiology, Molecular and Cellulrar Biosciences Research Foundation

【 摘 要 】

Pantoea agglomerans YS19 is a dominant endophytic bacterium isolated from rice, which is capable of promoting host plant growth by nitrogen-fixing and phytohormone secreting. We previously found that the cytidine repressor (CytR) protein conducts the regulation of indole signal in YS19. Here, we compared the whole-cell protein of the wild type YS19 and the Δ cytR mutant and subsequently identified one differential protein as alkyl hydroperoxide reductase subunit C related to oxidative stress and sulfur starvation tolerance. It was tested that cytR had a positive effect on the survival of YS19 under the oxidative stress and sulfur starvation conditions and this effect was inhibited by indole. To further understand the functional mode of indole in this regulation, we cloned the cytR promoter region (P cytR ) of YS19 and tested the effect of indole on P cytR using gfp as a reporter gene. It was found that P cytR can sense indole and significantly inhibit the expression of the downstream gene. This study provided a deeper understanding of the multiple function of cytR and expanded a new research direction of how indole participates in gene regulation.

【 授权许可】

Unknown