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Related Experiment Videos

Function and assembly of nuclear pore complex proteins.

K Bodoor1, S Shaikh, P Enarson

  • 1Department of Cell Biology and Anatomy, University of Calgary, AB, Canada.

Biochemistry and Cell Biology = Biochimie Et Biologie Cellulaire
|November 5, 1999
PubMed
Summary
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Nuclear pore complexes (NPCs) assemble sequentially during cell division. POM121 is identified as a key protein initiating NPC assembly at the nuclear envelope.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Structural Biology

Background:

  • Nuclear pore complexes (NPCs) regulate transport between the nucleus and cytoplasm.
  • NPC organization and assembly mechanisms remain incompletely understood.
  • NPC subunits disperse during mitosis and are reutilized for nuclear envelope reformation.

Purpose of the Study:

  • To elucidate the temporal order of NPC subunit assembly during postmitotic nuclear envelope formation.
  • To identify key proteins that initiate NPC assembly.
  • To understand the role of specific NPC proteins in nuclear envelope reformation.

Main Methods:

  • Mutagenesis and expression studies to identify protein targeting sequences.
  • Observation of NPC component behavior during mitosis and postmitotic nuclear envelope assembly.

Related Experiment Videos

  • Defining the time course of NPC protein association with chromatin and membranes.

    • Main Results:

    • A sequential assembly pathway for NPC components during nuclear envelope reformation was established.
    • Nup153 associates with chromatin late in anaphase.
    • POM121, not gp210, appears to define initial membrane-associated NPC assembly intermediates.

    Conclusions:

    • NPC assembly follows a defined temporal sequence during nuclear envelope reformation.
    • POM121 is a crucial component for initiating NPC assembly at the nuclear envelope.
    • Understanding NPC assembly provides insights into nuclear transport and cell division.