Cajal body proteins SMN and Coilin show differential dynamic behaviour in vivo

Judith E. Sleeman, Laura Trinkle-Mulcahy, Alan R. Prescott, Stephen C. Ogg, Angus I. Lamond (Lead / Corresponding author)

    Research output: Contribution to journalArticlepeer-review

    74 Citations (Scopus)

    Abstract

    Analysis of stable cell lines expressing fluorescently tagged survival of motor neurons protein (SMN) and coilin shows striking differences in their dynamic behaviour, both in the nucleus and during mitosis. Cajal bodies labelled with either FP-SMN or FP-coilin show similar behaviour and frequency of movements. However, fluorescence recovery after photobleaching (FRAP) studies show that SMN returns ∼50-fold more slowly to Cajal bodies than does coilin. Time-lapse studies on cells progressing from prophase through to G1 show further differences between SMN and coilin, both in their localisation in telophase and in the timing of their re-entry into daughter nuclei. The data reveal similarities between Cajal bodies and nucleoli in their behaviour during mitosis. This in vivo study indicates that SMN and coilin interact differentially with Cajal bodies and reveals parallels in the pathway for reassembly of nucleoli and Cajal bodies following mitosis.

    Original languageEnglish
    Pages (from-to)2039-2050
    Number of pages12
    JournalJournal of Cell Science
    Volume116
    Issue number10
    DOIs
    Publication statusPublished - 1 Apr 2003

    Keywords

    • Cajal bodies
    • Coilin
    • Mitosis
    • Nucleolus
    • Nucleus
    • SMN

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