Cbl upregulates cysH for hydrogen sulfide production in Aeromonas veronii

PeerJ

article

Yidong Zhang¹  Zebin Liu¹  Yanqiong Tang¹  Xiang Ma¹  Hongqian Tang¹  Hong Li¹  Zhu Liu¹ 

[1] Hainan University

关键词: SmpB;    Cbl;    H2S metabolism;    Regulation;   

DOI  :  10.7717/peerj.12058

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Endogenous hydrogen sulfide (H2S) is generated in many metabolism pathways, and has been recognized as a second messenger against antibiotics and reactive oxygen species (ROS). In Aeromonas veronii, Small Protein B (SmpB) plays an important role in resisting stress. The absence of smpB could trigger sulfate assimilation pathway to adapt the nutrient deficiency, of which was mediated by up-regulation of cbl and cys genes and followed with enhancing H2S production. To figure out the mutual regulations of cbl and cys genes, a series of experiments were performed. Compared with the wild type, cysH was down-regulated significantly in cbl deletion by qRT-PCR. The fluorescence analysis further manifested that Cbl had a positive regulatory effect on the promoter of cysJIH. Bacterial one-hybrid analysis and electrophoretic mobility shift assay (EMSA) verified that Cbl bound with the promoter of cysJIH. Collectively, the tolerance to adversity could be maintained by the production of H2S when SmpB was malfunctioned, of which the activity of cysJIH promoter was positively regulated by upstream Cbl protein. The outcomes also suggested the enormous potentials of Aeromonas veronii in environmental adaptability.

【 授权许可】

CC BY