Protein Containing the GGDEF Domain Affects Motility and Biofilm Formation in <i>Vibrio cholerae</i> and is Negatively Regulated by Fur and HapR.

He Gao; Li Zhi MA; Qin Qin; Yao Cui; Xiao Han MA; Yi Quan Zhang; Biao Kan

Return

Protein Containing the GGDEF Domain Affects Motility and Biofilm Formation in Vibrio cholerae and is Negatively Regulated by Fur and HapR.

Author: He GAO ¹ ; Li Zhi MA ² ; Qin QIN ¹ ; Yao CUI ¹ ; Xiao Han MA ¹ ; Yi Quan ZHANG ³ ; Biao KAN ¹
Author Information

1. State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China.
2. Medical Risk Management Section, Third Medical Centre, Chinese PLA (People's Liberation Army) General Hospital, Beijing 100039, China.
3. Department of Clinical Laboratory, Affiliated Nantong Hospital 3 of Nantong University, Nantong Third People's Hospital, Nantong 226006, Jiangsu, China.
Publication Type:Journal Article
Keywords: Cyclic di-GMP; Fur; HapR; VCA0560; Vibrio cholera
MeSH: Vibrio cholerae/genetics*; Biofilms; Quorum Sensing; Mutation; Gene Expression Regulation, Bacterial; Bacterial Proteins/genetics*
From: Biomedical and Environmental Sciences 2023;36(10):949-958
CountryChina
Language:English
Abstract: OBJECTIVE:This study aimed to investigate whether the VCA0560 gene acts as an active diguanylate cyclase (DGC) in Vibrio cholerae and how its transcription is regulated by Fur and HapR.
METHODS:The roles of VCA0560 was investigated by utilizing various phenotypic assays, including colony morphological characterization, crystal violet staining, Cyclic di-GMP (c-di-GMP) quantification, and swimming motility assay. The regulation of the VCA0560 gene by Fur and HapR was analyzed by luminescence assay, electrophoretic mobility shift assay, and DNase I footprinting.
RESULTS:VCA0560 gene mutation did not affect biofilm formation, motility, and c-di-GMP synthesis in V. cholerae, and its overexpression remarkably enhanced biofilm formation and intracellular c-di-GMP level but reduced motility capacity. The transcription of the VCA0560 gene was directly repressed by Fur and the master quorum sensing regulator HapR.
CONCLUSION:Overexpressed VCA0560 functions as an active DGC in V. cholerae, and its transcription is repressed by Fur and HapR.