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PXD025106

PXD025106 is an original dataset announced via ProteomeXchange.

Dataset Summary
TitleSilver binding proteins in S. aureus
DescriptionThe rapid emergence of drug resistant Staphylococcus aureus (S. aureus), in particular, methicillin-resistant S. aureus (MRSA) poses a serious threat to public health globally. Reuse of metal-based antimicrobials stands for one of the most promising strategies to resensitize drug resistant bacteria to conventional antibiotics. Silver (Ag) has been used as an antimicrobial agent since antiquity, yet its molecular mechanism of action is elusive largely owing to technical challenges to identify the direct silver-binding protein targets accountable for its action. Herein, using an in-house developed hyphenated technique LC-GE-ICP-MS, we successfully separated and identified 38 authentic Ag+-binding proteins (Ag+-proteome) in S. aureus at the whole-cell scale for the first time. By integration with bioinformatic analysis and systematic biochemical characterizations, we captured the first snapshot on the dynamic action of Ag+ against S. aureus at the molecular level, i.e., Ag+ primarily targets glycolysis via inhibiting multiple enzymes and induces the elevation of ROS through functional disruption of redox homeostasis system at the late stage, leading to an upregulation of oxidative pentose phosphate pathway (oxPPP) to alleviate Ag+ stress. However, the activation of oxPPP is ultimately futile due to key oxPPP enzymes being inhibited by Ag+. We further validated that Ag+ could inhibit 6-phosphogluconate dehydrogenase, a key target from oxPPP through binding to His185 at the active site and morphing the shape of catalytic pocket by X-ray crystallography. Significantly, the multi-target mode of action of silver is accountable for its suppression of antibiotic selection effects towards S. aureus as well as its sustainable antimicrobial activity. Such a unique mode of action of Ag+ (and silver nanoparticles) led to enhanced efficacy of a broad range of antibiotics and resensitization of MRSA to antibiotics. Our study resolves the long-standing question of the molecular targets of silver in S. aureus and offers a novel insight into the sustainable bacterial susceptibility of silver, providing a potential approach for combating antimicrobial resistance.
HostingRepositoryPRIDE
AnnounceDate2022-02-17
AnnouncementXMLSubmission_2022-02-17_00:11:24.059.xml
DigitalObjectIdentifier
ReviewLevelPeer-reviewed dataset
DatasetOriginOriginal dataset
RepositorySupportUnsupported dataset by repository
PrimarySubmitterHaibo Wang
SpeciesList scientific name: Staphylococcus aureus; NCBI TaxID: 1280;
ModificationListNo PTMs are included in the dataset
Instrument4800 Proteomics Analyzer
Dataset History
RevisionDatetimeStatusChangeLog Entry
02021-03-30 10:41:15ID requested
12022-02-17 00:11:24announced
Publication List
Wang H, Wang M, Xu X, Gao P, Xu Z, Zhang Q, Li H, Yan A, Kao RY, Sun H, Multi-target mode of action of silver against Staphylococcus aureus endows it with capability to combat antibiotic resistance. Nat Commun, 12(1):3331(2021) [pubmed]
Keyword List
submitter keyword: silver-binding protein, S. aureus
Contact List
Prof. Hongzhe Sun
contact affiliationDepartment of Chemistry, The University of Hong Kong
contact emailhsun@hku.hk
lab head
Haibo Wang
contact affiliationThe University of Hong Kong
contact emailhaibo_wang@connect.hku.hk
dataset submitter
Full Dataset Link List
Dataset FTP location
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PRIDE project URI
Repository Record List
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