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Related Experiment Video

Updated: Jan 6, 2026

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Sorting out the cellular functions of sorting nexins.

Carolyn A Worby1, Jack E Dixon

  • 1Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA. cdworby@umich.edu

Nature Reviews. Molecular Cell Biology
|December 4, 2002
PubMed
Summary

Sorting nexins are proteins involved in cellular trafficking. Their PX domain allows phospholipid binding, suggesting roles in membrane trafficking and protein sorting.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Protein Biochemistry

Background:

  • Sorting nexins constitute a diverse protein family.
  • These proteins are characterized by a conserved phospholipid-binding motif known as the PX domain.
  • Their functions are linked to cellular membrane trafficking and protein sorting pathways.

Purpose of the Study:

  • To explore the functional roles of sorting nexins in cellular processes.
  • To investigate the significance of the PX domain in sorting nexin function.
  • To elucidate whether different sorting nexins possess specialized or general roles in protein trafficking.

Main Methods:

  • Analysis of the PX domain's phospholipid-binding capabilities.
  • Investigation of sorting nexin protein-protein interactions.

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  • Functional assays to assess roles in membrane trafficking and protein sorting.

    • Main Results:

    • Sorting nexins exhibit specific phospholipid-binding properties via their PX domain.
    • These proteins demonstrate a propensity for forming protein-protein complexes.
    • Evidence suggests a critical role in membrane trafficking and protein sorting.

    Conclusions:

    • The phospholipid-binding and protein-interaction capabilities of sorting nexins underscore their importance in cellular transport.
    • Further research is warranted to differentiate the specialized versus generalized functions of individual sorting nexins in protein trafficking.