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2016 ; 4
(1
): 29-31
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Toxin-mediated gene regulatory mechanism in Staphylococcus aureus
#MMPMID28357385
Joo HS
; Otto M
Microb Cell
2016[Dec]; 4
(1
): 29-31
PMID28357385
show ga
The dangerous human pathogen Staphylococcus aureus relies heavily on toxins to
cause disease, but toxin production can put a strong burden on the bacteria's
energy balance. Thus, controlling the synthesis of proteins solely needed in
times of toxin production represents a way for the bacteria to avoid wasting
energy. One hypothetical manner to accomplish this sort of regulation is by gene
regulatory functions of the toxins themselves. There have been several reports
about gene regulation by toxins in S. aureus, but these were never verified on
the molecular level. In our study published in MBio [Joo et al., 7(5). pii:
e01579-16], we show that phenol-soluble modulins (PSMs), important peptide toxins
of S. aureus, release a repressor from the promoter of the operon encoding the
toxin export system, thereby enabling toxin secretion. This study describes the
first molecular regulatory mechanism exerted by an S. aureus toxin, setting a
paradigmatic example of how S. aureus toxins may influence cell functions to
adjust them to times of toxin production.