期刊
FUTURE MICROBIOLOGY
卷 11, 期 2, 页码 215-225出版社
FUTURE MEDICINE LTD
DOI: 10.2217/fmb.15.134
关键词
antivirulence strategy; macrophage; membrane peptide; MgtC; Mycobacterium tuberculosis; protein-protein interactions
类别
资金
- Vaincre La Mucoviscidose [IC0902]
- MRT fellowship from the French Ministry of Research
- Fondation for Medical Research [FRM FDT20140930905]
- CONACyT [CVU361158]
Background: The MgtC virulence factor has been proposed as an attractive target for antivirulence strategies because it is shared by several important bacterial pathogens, including Salmonella enterica and Mycobacterium tuberculosis (Mtb). Aim: A natural antagonistic peptide, MgtR, which interacts with MgtC and modulates its stability, has been identified in Salmonella, and we investigated its efficiency to target MgtC in another pathogen. Materials & methods: We evaluated the interaction between Salmonella MgtR peptide and the Mtb MgtC protein using an in vivo bacterial two-hybrid system and we addressed the effect of exogenously added synthetic MgtR and endogenously expressed peptide. Results: MgtR peptide strongly interacted with Mtb MgtC protein and exogenously added synthetic MgtR peptide-reduced Mtb MgtC level and interfered with the dimerization of Mtb MgtC. Importantly, heterologous expression of MgtR in Mycobacterium bovis BCG resulted in increased phagocytosis and reduced intramacrophage survival. Conclusion: MgtR peptide can target Mtb MgtC protein and reduce mycobacterial macrophage resistance, thus providing a promising new scaffold for the development of antivirulence compounds.
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