Design and application of a data-independent precursor and product ion repository

Konstantinos Thalassinos, Johannes P.C. Vissers, Stefan Tenzer, Yishai Levin, J. Will Thompson, David Daniel, Darrin Mann, Mark R. DeLong, M. Arthur Moseley, Antoine H. America, Andrew K. Ottens, Greg S. Cavey, Georgios Efstathiou, James Scrivens, James I. Langridge, Scott J. Geromanos

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)


    The functional design and application of a data-independent LC-MS precursor and product ion repository for protein identification, quantification, and validation is conceptually described. The ion repository was constructed from the sequence search results of a broad range of discovery experiments investigating various tissue types of two closely related mammalian species. The relative high degree of similarity in protein complement, ion detection, and peptide and protein identification allows for the analysis of normalized precursor and product ion intensity values, as well as standardized retention times, creating a multidimensional/orthogonal queryable, qualitative, and quantitative space. Peptide ion map selection for identification and quantification is primarily based on replication and limited variation. The information is stored in a relational database and is used to create peptide- and protein-specific fragment ion maps that can be queried in a targeted fashion against the raw or time aligned ion detections. These queries can be conducted either individually or as groups, where the latter affords pathway and molecular machinery analysis of the protein complement. The presented results also suggest that peptide ionization and fragmentation efficiencies are highly conserved between experiments and practically independent of the analyzed biological sample when using similar instrumentation. Moreover, the data illustrate only minor variation in ionization efficiency with amino acid sequence substitutions occurring between species. Finally, the data and the presented results illustrate how LC-MS performance metrics can be extracted and utilized to ensure optimal performance of the employed analytical workflows.

    Original languageEnglish
    Pages (from-to)1808-1820
    Number of pages13
    JournalJournal of the American Society for Mass Spectrometry
    Issue number10
    Publication statusPublished - 1 Oct 2012


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