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PXD004862

PXD004862 is an original dataset announced via ProteomeXchange.

Dataset Summary
TitleQuantification of sulfenic acid modification in an atherosclerosis
DescriptionPhysiological stimuli such as thrombin, or pathological stimuli such as lysophosphatidic acid (LPA), activate platelets. The activated platelets bind to monocytes through P-selectin-PSGL-1 interactions, but also release the contents of their granules, commonly called “platelet releasate”. It is known that monocytes in contact with platelet releasate produce reactive oxygen species (ROS). Reversible cysteine oxidation by ROS is considered to be a potential regulator of protein function. In a previous study, we used THP-1 monocytic cells exposed to LPA- or thrombin-induced platelet releasate and a modified biotin switch assay to unravel the biological processes that are influenced by reversible cysteine oxidation. To gain a better understanding of the redox regulation of monocytes in atherosclerosis, we have now altered the modified biotin switch to selectively quantify protein sulfenic acid, a subpopulation of reversible cysteine oxidation. Using arsenite as reducing agent in the modified biotin switch assay, we were able to quantify 1161 proteins, in which more than 100 sulfenic acid sites were identified. Bioinformatics analysis of the quantified sulfenic acid sites highlighted the relevant, previously missed biological process of monocyte transendothelial migration, which included integrin β2. Flow cytometry validated the activation of LFA-1 (αLβ2) and Mac-1 (αMβ2), two subfamilies of integrin β2 complexes, on human primary monocytes following platelet releasate treatment. The activation of LFA-1 was mediated by ROS from NADPH oxidase (NOX) activation. Production of ROS and activation of LFA-1 in human primary monocytes were independent of P-selectin-PSGL-1 interaction. Our results proved the modified biotin switch assay to be a powerful tool with the ability to reveal new regulatory mechanisms and identify new therapeutic targets.
HostingRepositoryPRIDE
AnnounceDate2024-10-22
AnnouncementXMLSubmission_2024-10-22_04:32:06.907.xml
DigitalObjectIdentifier
ReviewLevelPeer-reviewed dataset
DatasetOriginOriginal dataset
RepositorySupportUnsupported dataset by repository
PrimarySubmitterRu Li
SpeciesList scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationListmonohydroxylated residue; iodoacetamide derivatized residue
InstrumentmaXis
Dataset History
RevisionDatetimeStatusChangeLog Entry
02016-08-18 01:47:02ID requested
12016-10-10 03:24:38announced
22024-10-22 04:32:09announced2024-10-22: Updated project metadata.
Publication List
Li R, Klockenbusch C, Lin L, Jiang H, Lin S, Kast J, on Monocytes via NADPH Oxidase. J Proteome Res, 15(12):4221-4233(2016) [pubmed]
Keyword List
curator keyword: Biological, Biomedical
submitter keyword: sulfenic acid, biotin switch assay, THP-1 cell, NOX
Contact List
Juergen Kast
contact affiliationBiomedical research centre University of British Columbia
contact emailkast@brc.ubc.ca
lab head
Ru Li
contact affiliationUniverisity of British Columbia
contact emailrli@brc.ubc.ca
dataset submitter
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Dataset FTP location
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