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- Title
EnvC Homolog Encoded by Xanthomonas citri subsp. citri Is Necessary for Cell Division and Virulence.
- Authors
Pena, Michelle M.; Martins, Thaisa Z.; Teper, Doron; Zamuner, Caio; Alves, Helen A.; Ferreira, Henrique; Wang, Nian; Ferro, Maria Inês T.; Ferro, Jesus A.
- Abstract
Peptidoglycan hydrolases are enzymes responsible for breaking the peptidoglycan present in the bacterial cell wall, facilitating cell growth, cell division and peptidoglycan turnover. Xanthomonas citri subsp. citri (X. citri), the causal agent of citrus canker, encodes an Escherichia coli M23 peptidase EnvC homolog. EnvC is a LytM factor essential for cleaving the septal peptidoglycan, thereby facilitating the separation of daughter cells. In this study, the investigation focused on EnvC contribution to the virulence and cell separation of X. citri. It was observed that disruption of the X. citri envC gene (ΔenvC) led to a reduction in virulence. Upon inoculation into leaves of Rangpur lime (Citrus limonia Osbeck), the X. citri ΔenvC exhibited a delayed onset of citrus canker symptoms compared with the wild-type X. citri. Mutant complementation restored the wild-type phenotype. Sub-cellular localization confirmed that X. citri EnvC is a periplasmic protein. Moreover, the X. citri ΔenvC mutant exhibited elongated cells, indicating a defect in cell division. These findings support the role of EnvC in the regulation of cell wall organization, cell division, and they clarify the role of this peptidase in X. citri virulence.
- Subjects
XANTHOMONAS campestris; CELL division; CANKER (Plant disease); CITRUS canker; BACTERIAL cell walls; CITRUS greening disease; CELL separation; CELLULAR control mechanisms
- Publication
Microorganisms, 2024, Vol 12, Issue 4, p691
- ISSN
2076-2607
- Publication type
Article
- DOI
10.3390/microorganisms12040691