PXD025880-1

PXD025880 is an original dataset announced via ProteomeXchange.

Title	Protease activity profiling of ovarian clear cell carcinoma
Description	Ovarian clear cell carcinoma (OCCC) is an understudied poor prognosis subtype of ovarian cancer lacking in effective molecularly targeted therapies; efforts to define drivers of OCCC malignancy may lead to new therapeutic targets and approaches. Among potential targets are secreted proteases, enzymes which in many cancers serve as key drivers of malignant progression. To identify proteases responsible for the proteolytic landscape of the tumor microenvironment requires methods that directly report on enzyme activity, as transcript or protein abundance alone are poor indicators of protease activity. Here we developed an activity-based probe featuring an arginine diphenylphosphonate warhead to detect active serine proteases of trypsin-like specificity. A biotin handle was incorporated to facilitate affinity purification of labeled proteases. Using this probe, we employed activity-based protein profiling to identify active trypsin-like serine proteases within the complex proteome secreted by OCCC cell lines. We identified multiple active serine proteases in OCCC cell lines, including two proteases in common, tissue plasminogen activator (tPA) and urokinase-type plasminogen activator (uPA). Further interrogation of these proteases showed that both were involved in cancer cell invasion and proliferation of OCCC cells. The detection of tPA and uPA as catalytically active proteases and significant drivers of the malignant phenotype may point to these enzymes as targets for new therapeutic strategies in OCCC. Our activity-based probe and profiling methodology also offer a valuable tool for detection of active trypsin-like serine proteases in models of other cancers and other diseases.
HostingRepository	MassIVE
AnnounceDate	2024-10-16
AnnouncementXML	Submission_2024-10-16_08:45:23.939.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Supported dataset by repository
PrimarySubmitter	Benjamin Madden
SpeciesList	scientific name: Homo sapiens; common name: human; NCBI TaxID: 9606;
ModificationList	unknown modification
Instrument	LTQ Orbitrap Elite

Revision	Datetime	Status	ChangeLog Entry
0	2021-05-07 07:30:00	ID requested
⏵ 1	2024-10-16 08:45:24	announced

Mehner C, Hockla A, Coban M, Madden B, Estrada R, Radisky DC, Radisky ES, Activity-based protein profiling reveals active serine proteases that drive malignancy of human ovarian clear cell carcinoma. J Biol Chem, 298(8):102146(2022) [pubmed]

submitter keyword: serine protease, ovarian cancer, proteomics, proteolytic enzyme, peptidase, protein chemical modification, enzyme inhibitor, tumor microenvironment, activity-based probe, activity-based protein profiling (ABPP)

Evette Radisky
contact affiliation	Mayo Clinic
contact email	radisky.evette@mayo.edu
lab head
Benjamin Madden
contact affiliation	Mayo Clinic
contact email	madden.benjamin@mayo.edu
dataset submitter

MassIVE dataset URI

Dataset FTP location NOTE: Most web browsers have now discontinued native support for FTP access within the browser window. But you can usually install another FTP app (we recommend FileZilla) and configure your browser to launch the external application when you click on this FTP link. Or otherwise, launch an app that supports FTP (like FileZilla) and use this address: ftp://massive.ucsd.edu/v03/MSV000087385/