Download MendeleyA c-di-GMP binding effector STM0435 modulates flagellar motility and pathogenicity in Salmonella
Dai , Y., Liu , R., Yue , Y., Song , N., Jia , H., Ma , Z., Gao , X., Zhang , M., Yuan , X., Liu , Q., Liu , X., Li , B., Wang , W.(2024) Virulence 15: 2331265
- PubMed: 38532247
- DOI: https://doi.org/10.1080/21505594.2024.2331265
- Primary Citation of Related Structures:
8K4I, 8K5Q - PubMed Abstract:
Flagella play a crucial role in the invasion process of Salmonella and function as a significant antigen that triggers host pyroptosis. Regulation of flagellar biogenesis is essential for both pathogenicity and immune escape of Salmonella . We identified the conserved and unknown function protein STM0435 as a new flagellar regulator. The ∆ stm0435 strain exhibited higher pathogenicity in both cellular and animal infection experiments than the wild-type Salmonella . Proteomic and transcriptomic analyses demonstrated dramatic increases in almost all flagellar genes in the ∆ stm0435 strain compared to wild-type Salmonella . In a surface plasmon resonance assay, purified STM0435 protein-bound c-di-GMP had an affinity of ~8.383 µM. The crystal structures of apo-STM0435 and STM0435&c-di-GMP complex were determined. Structural analysis revealed that R33, R137, and D138 of STM0435 were essential for c-di-GMP binding. A Salmonella with STM1987 (GGDEF protein) or STM4264 (EAL protein) overexpression exhibits completely different motility behaviours, indicating that the binding of c-di-GMP to STM0435 promotes its inhibitory effect on Salmonella flagellar biogenesis.
Organizational Affiliation:
Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China.
