PXD004680 is an
original dataset announced via ProteomeXchange.
Dataset Summary
Title | A quantitative map of beta-lactone induced virulence regulation |
Description | Beta-lactones have recently been introduced as the first selective ClpP inhibitors that attenuate virulence of both sensitive Staphylococcus aureus and multiresistant strains (MRSA). Although previous knockout studies showed that ClpP is essential for S. aureus alpha-toxin production a link between beta-lactone inhibition and molecular virulence mechanisms has been lacking so far. We here perform a chemical-proteomic approach to elucidate anti-virulence pathways. First, we demonstrate by gel-free activity-based protein profiling that ClpP is the predominant target of beta-lactones. Only a few off-targets were discovered, which, unlike ClpP, were not involved in the reduction of alpha-toxin expression. Second, in-depth mechanistic insight was provided by a full proteomic comparison between lactone treated and untreated S. aureus cells. Quantitative mass spectrometric analysis revealed a strong up-regulation of Rot and a corresponding down-regulation of alpha-toxin, providing the first direct connection between the lactone-dependent phenotype and a corresponding cellular mechanism. By building up a quantitative virulence regulation network, we visualize the impact of ClpP inhibition in a systems biology context. Interestingly, a lack of in vitro Rot degradation by either ClpXP or ClpCP calls for an indirect mode of action that may involve ClpX-mediated RNA signaling and feed-back circuits. |
HostingRepository | PRIDE |
AnnounceDate | 2024-10-22 |
AnnouncementXML | Submission_2024-10-22_04:35:31.380.xml |
DigitalObjectIdentifier | |
ReviewLevel | Peer-reviewed dataset |
DatasetOrigin | Original dataset |
RepositorySupport | Unsupported dataset by repository |
PrimarySubmitter | Matthias Stahl |
SpeciesList | scientific name: Staphylococcus aureus; NCBI TaxID: 1280; |
ModificationList | monohydroxylated residue; acetylated residue; iodoacetamide derivatized residue |
Instrument | Orbitrap Fusion ETD; LTQ Orbitrap XL |
Dataset History
Revision | Datetime | Status | ChangeLog Entry |
0 | 2016-07-29 03:51:28 | ID requested | |
1 | 2017-02-08 00:55:24 | announced | |
2 | 2017-02-14 00:37:04 | announced | Updated project metadata. |
3 | 2017-02-23 04:26:09 | announced | Updated project metadata. |
⏵ 4 | 2024-10-22 04:35:38 | announced | 2024-10-22: Updated project metadata. |
Publication List
Krysiak J, Stahl M, Vomacka J, Fetzer C, Lakemeyer M, Fux A, Sieber SA, -Lactone-Induced Virulence Regulation. J Proteome Res, 16(3):1180-1192(2017) [pubmed] |
10.1021/acs.jproteome.6b00705; |
Keyword List
curator keyword: Biomedical |
submitter keyword: proteomics, chemical knockout,S. aureus ClpP, antivirulence, activity-based protein profiling |
Contact List
Stephan A. Sieber |
contact affiliation | Center for Integrated Protein Science Munich (CIPSM) at the Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85747 Garching b. München |
contact email | stephan.sieber@mytum.de |
lab head | |
Matthias Stahl |
contact affiliation | Karolinska Institutet |
contact email | matthias.stahl@ki.se |
dataset submitter | |
Full Dataset Link List
Dataset FTP location
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PRIDE project URI |
Repository Record List
[ + ]
[ - ]
- PRIDE
- PXD004680
- Label: PRIDE project
- Name: A quantitative map of beta-lactone induced virulence regulation