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Double donut versus filament: How structural shapes regulate SPOP activity and cancer pathogenesis
Lorraine Glennie1, Danny T Huang2
1Cancer Research UK Scotland Institute, Garscube Estate, Switchback Road, Glasgow G61 1BD, UK.
Molecular Cell
|August 6, 2026
Summary
The study reveals Scaffold Protein (SPOP) exists in two states: inactive double donuts and active linear filaments. This equilibrium disruption is linked to cancer development.
Area of Science:
- Biochemistry
- Molecular Biology
- Cancer Biology
Background:
- Scaffold Protein (SPOP) is a key protein involved in cellular processes.
- Dysregulation of SPOP has been implicated in various cancers.
Purpose of the Study:
- To investigate the quaternary states of SPOP.
- To understand how SPOP states are regulated and their role in cancer.
Main Methods:
- Structural biology techniques to visualize SPOP oligomers.
- Biochemical assays to study SPOP state transitions.
Main Results:
- SPOP exists in an equilibrium between two quaternary states: inactive double donuts and active linear filaments.
- Gain-of-function cancer mutations are associated with specific SPOP oligomeric states.
Conclusions:
- The equilibrium between SPOP quaternary states is crucial for normal cellular function.
- Dysregulation of this SPOP equilibrium contributes to cancer pathogenesis.
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