A proteomic study of SUMO-2 target proteins

Alfred C.O. Vertegaal, Stephen C. Ogg, Ellis Jaffray, Manuel S. Rodriguez, Ronald T. Hay, Jens S. Andersen, Matthias Mann, Angus I. Lamond

    Research output: Contribution to journalArticlepeer-review

    190 Citations (Scopus)


    The SUMO family in vertebrates includes at least three distinct proteins (SUMO-1, -2, and -3) that are added as post-translational modifications to target proteins. A considerable number of SUMO-1 target proteins have been identified, but little is known about SUMO-2. A stable HeLa cell line expressing His6-tagged SUMO-2 was established and used to label and purify novel endogenous SUMO-2 target proteins. Tagged forms of SUMO-2 were functional and localized predominantly in the nucleus. His6-tagged SUMO-2 conjugates were affinity-purified from nuclear fractions and identified by mass spectrometry. Eight novel potential SUMO-2 target proteins were identified by at least two peptides. Three of these proteins, SART1, heterogeneous nuclear ribonucleoprotein (RNP) M, and the U5 small nuclear RNP 200-kDa helicase, play a role in RNA metabolism. SART1 and heterogeneous nuclear RNP M were both shown to be genuine SUMO targets, confirming the validity of the approach.

    Original languageEnglish
    Pages (from-to)33791-33798
    Number of pages8
    JournalJournal of Biological Chemistry
    Issue number32
    Publication statusPublished - 6 Aug 2004

    ASJC Scopus subject areas

    • Biochemistry
    • Molecular Biology
    • Cell Biology


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