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Split-GFP Complementation to Study the Nuclear Membrane Proteome Using Microscopy.

Shary N Shelton1, Sarah E Smith1, Sue L Jaspersen2,3

  • 1Stowers Institute for Medical Research, Kansas City, MO, USA.

Methods in Molecular Biology (Clifton, N.J.)
|April 12, 2022
PubMed
Summary
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Researchers developed a split-green fluorescent protein (split-GFP) method to precisely map proteins within the nuclear envelope. This technique overcomes challenges in isolating the nuclear envelope proteome, distinguishing inner and outer membrane proteins.

Area of Science:

  • Cell Biology
  • Proteomics
  • Molecular Imaging

Background:

  • Defining organelle proteomes is crucial for understanding cellular functions.
  • The nuclear envelope proteome is difficult to study due to its continuity with the endoplasmic reticulum.
  • Traditional fractionation methods face challenges in accurately isolating nuclear envelope components.

Purpose of the Study:

  • To develop a novel method for defining the nuclear envelope proteome.
  • To overcome limitations of traditional biochemical fractionation techniques.
  • To accurately determine protein localization within the nuclear envelope.

Main Methods:

  • Adaptation of split-green fluorescent protein (split-GFP) technology.
  • Utilizing split-GFP to resolve protein topology.
Keywords:
BiFCInner nuclear membraneNuclear envelopeNucleusOuter nuclear membraneProtein localizationSplit green fluorescent proteinYeast

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  • Distinguishing protein localization to the inner nuclear membrane (INM) and outer nuclear membrane (ONM).

    • Main Results:

    • Successfully adapted split-GFP for nuclear envelope proteome analysis.
    • Demonstrated the ability to resolve protein topology within the nuclear envelope.
    • Achieved accurate distinction between INM and ONM protein localization.

    Conclusions:

    • The split-GFP system provides a robust tool for nuclear envelope proteome definition.
    • This method offers improved accuracy in localizing proteins to specific nuclear envelope compartments.
    • Enables deeper insights into nuclear envelope functions and dynamics.