The garlic compound allicin causes strong disulfide stress and protein S-sulfoallylation as revealed by proteomics and transcriptomics in Staphylococcus aureus

ABSTRACT: Allicin from garlic is an antimicrobial substance that is effective against several ESKAPE pathogens, including methicillin-resistant Staphylococcus aureus (MRSA). However, the antimicrobial mode action of allicin has not been revealed in Gram-positive bacteria. Here, we have studied the changes in the transcriptome by Allicin which revealed a thiol-specific oxidative stress response in S. aureus. Using shotgun proteomics, we identified numerous proteins that were modified by protein S-sulfoallylation in S. aureus. Allicin further caused an oxidative shift in the bacillithiol (BSH) redox potential as revealed by Brx-roGFP2 biosensor measurements. In summary, our results revealed that allicin acts via sulfoallylation of Cys residues in proteins causing an impaired redox state in S. aureus.

INSTRUMENT(S):

ORGANISM(S): Staphylococcus Aureus

SUBMITTER: Tobias Busche  

LAB HEAD: Haike Antelmann

PROVIDER: PXD010338 | Pride | 2022-02-28

REPOSITORIES: Pride