PXD037532-1
PXD037532 is an original dataset announced via ProteomeXchange.
Dataset Summary
| Title | Improved Structural Characterization of Glycerophospholipids and Sphingomyelins with Real-Time Library Searching |
| Description | In mass spectrometry-based lipidomics complex lipid mixtures undergo chromatographic separation, are ionized, and are detected using tandem MS (MSn) to simultaneously quantify and structurally characterize eluting species. The reported structural granularity of these identified lipids is strongly reliant on the analytical techniques leveraged in a study. For example, lipid identifications from traditional collisionally activated data-dependent acquisition experiments are often reported at either species level or molecular species level levels. Structural resolution of reported lipid identifications is routinely enhanced by integrating both positive and negative-mode analyses, requiring two separate runs or polarity switching during a single analysis. MS3+ can further elucidate lipid structure, but the lengthened MS duty cycle can negatively impact analysis depth. Recently functionality has been introduced on several Orbitrap-Tribrid mass spectrometry platforms to identify eluting molecular species on-the-fly. These real-time identifications can be leveraged to trigger downstream tandem MS to improve structural characterization of a specific compound with lessened impacts on analysis depth. Here we describe a novel lipidomics real-time library search (RTLS) approach which utilizes the lipid class of real-time identifications to trigger class-targeted MSn and to improve the structural characterization of phosphotidylcholines, phosphotidylethanolamines, phosphotidylinositols, phosphotidylglycerols, phosphotidylserine, and sphingomyelins in the positive ion mode. Our class-based RTLS method demonstrates improved selectivity compared to current methodology of triggering MSn on the presence of characteristic ions or neutral losses. |
| HostingRepository | MassIVE |
| AnnounceDate | 2022-10-31 |
| AnnouncementXML | Submission_2022-10-31_06:47:59.441.xml |
| DigitalObjectIdentifier | |
| ReviewLevel | Non peer-reviewed dataset |
| DatasetOrigin | Original dataset |
| RepositorySupport | Unsupported dataset by repository |
| PrimarySubmitter | Dain Brademan |
| SpeciesList | scientific name: Homo sapiens; common name: human; NCBI TaxID: 9606; |
| ModificationList | No PTMs are included in the dataset |
| Instrument | Orbitrap Eclipse |
Dataset History
| Revision | Datetime | Status | ChangeLog Entry |
|---|---|---|---|
| 0 | 2022-10-18 09:22:02 | ID requested | |
| ⏵ 1 | 2022-10-31 06:47:59 | announced |
Publication List
| no publication |
Keyword List
| submitter keyword: Lipidomics, MSn Trees, RTLS, UltimateSplash |
Contact List
| Josh J. Coon | |
|---|---|
| contact affiliation | University of Wisconsin - Madison |
| contact email | jcoon@chem.wisc.edu |
| lab head | |
| Dain Brademan | |
| contact affiliation | Coon Laboratory |
| contact email | brademan@wisc.edu |
| dataset submitter | |
Full Dataset Link List
| 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/MSV000090548/ |
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