Broad spectrum identification of cellular small ubiquitin-related modifier (SUMO) substrate proteins

Yingming Zhao, Sung Won Kwon, Anthony Anselmo, Kiran Kaur, Michael A. White

Research output: Contribution to journalArticlepeer-review

120 Scopus citations


Reversible covalent modification of proteins with a small ubiquitin-related modifier (SUMO) is emerging as an important system contributing to dynamic regulation of protein function. To enhance our understanding of the cell regulatory systems impacted by sumoylation, we used affinity chromatography-coupled high pressure liquid chromatography/tandem mass spectrometry for unbiased identification of candidate cellular SUMO substrate proteins. Here we describe the identification of 21 candidate sumoylated proteins from whole-cell lysates of HEK-293 cells. The nature of the proteins identified is consistent with a role for sumoylation in diverse cell regulatory systems but highlights regulation of chromatin organization and gene expression as major systems targeted by the sumoylation machinery.

Original languageEnglish (US)
Pages (from-to)20999-21002
Number of pages4
JournalJournal of Biological Chemistry
Issue number20
StatePublished - May 14 2004

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology


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