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Updated: Jun 8, 2026
09:33
High-Resolution Complexome Profiling by Cryoslicing BN-MS Analysis
Published on: October 15, 2019
Assembly and solution structure of the core retromer protein complex.
Suzanne J Norwood1, Daniel J Shaw, Nathan P Cowieson
1Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland 4072, Australia.
Traffic (Copenhagen, Denmark)
|September 30, 2010
Summary
The retromer complex
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- Retromer is a vital protein complex regulating endosomal trafficking.
- Its core comprises VPS35, VPS29, and VPS26 subunits with distinct functions.
- Understanding retromer assembly is crucial for endosomal transport research.
Purpose of the Study:
- To investigate the thermodynamics of core retromer assembly.
- To elucidate the binding interactions between VPS35, VPS29, and VPS26 subunits.
- To characterize the role of the VPS35 PRLYL motif in VPS26 interaction.
Main Methods:
- Isothermal titration calorimetry (ITC) for thermodynamic analysis.
- Heat capacity measurements to study binding interfaces and conformational changes.
- Small-angle X-ray scattering (SAXS) for structural modeling.
Main Results:
- VPS35 serves as the central subunit, with independent binding of VPS29 and VPS26.
- The VPS35 PRLYL motif is essential for direct VPS26 binding.
- Extensive binding interfaces and potential conformational changes were observed.
- A model suggests VPS35 as a platform with distal VPS29/VPS26 binding, allowing dimer formation.
Conclusions:
- VPS35 is the central scaffold for retromer core assembly.
- Specific motifs and subunit interactions dictate complex formation and stability.
- The findings provide insights into retromer's structural organization and function in trafficking.
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