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Updated: Mar 6, 2026
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Quantitative Approaches for Scoring in vivo Neuronal Aggregate and Organelle Extrusion in Large Exopher Vesicles in C. elegans
Published on: September 18, 2020
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Structural extension of the human exocyst is enabled by a minimal interface
Haonan D Xu1, Mihaly Badonyi2, Marilyn Paul1
1School of Life Sciences, University of Dundee, Dundee, UK.
Structure (London, England : 1993)
|March 4, 2026
Summary
The human exocyst complex, crucial for cell trafficking, has an extended, arm-like structure. This architecture facilitates its function in tethering vesicles to membranes, with minimal subunit interaction during assembly.
Area of Science:
- Cell Biology
- Structural Biology
- Molecular Mechanisms
Background:
- Polarized trafficking directs cargo secretion in multicellular organisms.
- The exocyst complex is central to this machinery, tethering vesicles to membranes.
- The spatial integration and assembly of the exocyst complex remain unclear.
Purpose of the Study:
- To elucidate the structural morphology and formation of the human exocyst complex.
- To understand how the exocyst spatially integrates membranes and binding partners.
- To provide a biochemical basis for exocyst complex assembly.
Main Methods:
- Utilized structural approaches.
- Employed predictive modeling.
- Investigated exocyst subcomplexes and holocomplex formation.
Main Results:
- The exocyst and its subcomplexes exhibit extended, arm-like structures.
- Demonstrated minimal intersubunit interaction, differing from previous models.
- Holocomplex nucleation occurs at a single site, explaining its spatial extension.
Conclusions:
- The human exocyst complex possesses an ornate, extended architecture.
- This structure maximizes the exocyst's reach for membrane tethering.
- Provides a foundational understanding of exocyst assembly and function.
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