Nucleolar proteome dynamics

Jens S. Andersen, Yun W. Lam, Anthony K.L. Leung, Shao En Ong, Carol E. Lyon, Angus I. Lamond, Matthias Mann

Research output: Contribution to journalArticle

849 Citations (Scopus)

Abstract

The nucleolus is a key organelle that coordinates the synthesis and assembly of ribosomal subunits and forms in the nucleus around the repeated ribosomal gene clusters. Because the production of ribosomes is a major metabolic activity, the function of the nucleolus is tightly linked to cell growth and proliferation, and recent data suggest that the nucleolus also plays an important role in cell-cycle regulation, senescence and stress responses 1-4. Here, using mass-spectrometry-based organellar proteomics and stable isotope labelling5, we perform a quantitative analysis of the proteome of human nucleoli. In vivo fluorescent imaging techniques are directly compared to endogenous protein changes measured by proteomics. We characterize the flux of 489 endogenous nucleolar proteins in response to three different metabolic inhibitors that each affect nucleolar morphology. Proteins that are stably associated, such as RNA polymerase I subunits and small nuclear ribonucleoprotein particle complexes, exit from or accumulate in the nucleolus with similar kinetics, whereas protein components of the large and small ribosomal subunits leave the nucleolus with markedly different kinetics. The data establish a quantitative proteomic approach for the temporal characterization of protein flux through cellular organelles and demonstrate that the nucleolar proteome changes significantly over time in response to changes in cellular growth conditions.

Original languageEnglish
Pages (from-to)77-83
Number of pages7
JournalNature
Volume433
Issue number7021
DOIs
Publication statusPublished - 6 Jan 2005

Fingerprint Dive into the research topics of 'Nucleolar proteome dynamics'. Together they form a unique fingerprint.

  • Cite this

    Andersen, J. S., Lam, Y. W., Leung, A. K. L., Ong, S. E., Lyon, C. E., Lamond, A. I., & Mann, M. (2005). Nucleolar proteome dynamics. Nature, 433(7021), 77-83. https://doi.org/10.1038/nature03207