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Related Experiment Videos

Nucleocytoplasmic transport: Ran, beta and beyond.

S Kuersten1, M Ohno, I W Mattaj

  • 1Gene Expression Programme, European Molecular Biology Laboratory, Meyerhofstrasse 1, D-69117, Heidelberg, Germany.

Trends in Cell Biology
|November 24, 2001
PubMed
Summary
This summary is machine-generated.

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Nucleocytoplasmic transport moves molecules rapidly and selectively. This review explores known mechanisms and novel functions of nuclear transport, even in cells lacking a nucleus.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Nucleocytoplasmic transport is essential for cellular function, involving the movement of proteins, RNAs, and macromolecular complexes between the nucleus and cytoplasm.
  • The importin beta family and Ran GTPase are key regulators of this transport, ensuring efficiency and selectivity.
  • However, some transport processes do not align with the established importin/Ran model, suggesting alternative mechanisms.

Purpose of the Study:

  • To review current understanding of diverse nucleocytoplasmic transport mechanisms.
  • To evaluate cellular functions mediated by nucleocytoplasmic transport machinery in non-eukaryotic systems or anucleated cells.

Main Methods:

  • Literature review and synthesis of existing research on nucleocytoplasmic transport.

Related Experiment Videos

  • Analysis of case studies demonstrating transport mechanisms outside the canonical importin/Ran pathway.
  • Evaluation of functional roles of transport components in nuclear and non-nuclear contexts.

    • Main Results:

    • Established models involving importin beta and Ran GTPase explain many, but not all, nucleocytoplasmic transport events.
    • Alternative and less understood mechanisms contribute to the specificity and rapidity of transport.
    • Nucleocytoplasmic transport molecules and pathways are repurposed for critical cellular functions in the absence of a nucleus.

    Conclusions:

    • Nucleocytoplasmic transport is more complex than initially understood, involving multiple pathways.
    • The study of these transport systems offers insights into fundamental cellular processes, including those in anucleated cells.
    • Further research is needed to fully elucidate the diversity and function of nucleocytoplasmic transport.