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Navigating the signaling landscape of Ralstonia solanacearum: a study of bacterial two-component systems

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Abstract

Ralstonia solanacearum, the bacterium that causes bacterial wilt, is a destructive phytopathogen that can infect over 450 different plant species. Several agriculturally significant crop plants, including eggplant, tomato, pepper, potato, and ginger, are highly susceptible to this plant disease, which has a global impact on crop quality and yield. There is currently no known preventive method that works well for bacterial wilt. Bacteria use two-component systems (TCSs) to sense their environment constantly and react appropriately. This is achieved by an extracellular sensor kinase (SK) capable of sensing a suitable signal and a cytoplasmic response regulator (RR) which gives a downstream response. Moreover, our investigation revealed that R. solanacearum GMI1000 possesses a substantial count of TCSs, specifically comprising 36 RRs and 27 SKs. While TCSs are known targets for various human pathogenic bacteria, such as Salmonella, the role of TCSs in R. solanacearum remains largely unexplored in this context. Notably, numerous inhibitors targeting TCSs have been identified, including GHL (Gyrase, Hsp, and MutL) compounds, Walk inhibitors, and anti-TCS medications like Radicicol. Consequently, the investigation into the involvement of TCSs in virulence and pathogenesis has gained traction; however, further research is imperative to ascertain whether TCSs could potentially supplant conventional anti-wilt therapies. This review delves into the prospective utilization of TCSs as an alternative anti-wilt therapy, focusing on the lethal phytopathogen R. solanacearum.

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Acknowledgments

The authors would like to express their gratitude to the Science and Engineering Research Board (SERB), Department of Science and Technology (DST), Government of India, for the core research grant. MY is grateful to SERB-DST for Research Associate (RA) fellowship.

Funding

This study was supported by the Science and Engineering Research Board (SERB), Department of Science and Technology (DST), Government of India, [Grant No. CRG/2020/002651].

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MY: Conceptualization, Investigation, Visualization, Writing original drafts. JS: Writing original drafts. VT: Writing review and editing. AK: Supervision, Writing review and editing. All authors read, edited and approved the manuscript.

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Correspondence to Aditya Kumar.

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Yadav, M., Sathe, J., Teronpi, V. et al. Navigating the signaling landscape of Ralstonia solanacearum: a study of bacterial two-component systems. World J Microbiol Biotechnol 40, 153 (2024). https://doi.org/10.1007/s11274-024-03950-y

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  • DOI: https://doi.org/10.1007/s11274-024-03950-y

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