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Updated: Jun 7, 2026
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Transmembrane Domain Oligomerization Propensity determined by ToxR Assay
Published on: May 26, 2011
Molecular basis of coiled-coil oligomerization-state specificity
Barbara Ciani1, Saša Bjelic, Srinivas Honnappa
1Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, United Kingdom.
Summary
Coiled coil protein folding and oligomerization depend on trigger sequences. Specific determinants only alter protein topology when within these sequences, improving design predictability.
Area of Science:
- Protein structure and design
- Biophysics
- Molecular biology
Background:
- Coiled coils are versatile protein structures used in diverse applications.
- Understanding factors controlling coiled coil folding and oligomerization is crucial.
- A key unresolved question is why oligomerization determinants don't always correlate with topology.
Purpose of the Study:
- To investigate the link between coiled coil oligomerization specificity and trigger sequences.
- To understand why specific determinants do not always correlate with protein topology.
- To improve the prediction and rational design of coiled coil structures.
Main Methods:
- Utilized the GCN4 coiled coil domain as a model system.
- Experimentally tested the effect of inserting oligomerization determinants into trigger sequences.
- Validated findings in unrelated coiled coil dimers (ATF1 and cortexillin-1).
Main Results:
- Discovered a general link between coiled coil oligomerization specificity and trigger sequences.
- Demonstrated that trimer-specific determinants switch topology only when within the trigger sequence.
- Showed that multiple determinants can coexist in trigger sequences, balancing oligomerization state.
Conclusions:
- Trigger sequences play a critical role in determining coiled coil oligomerization state.
- Findings significantly improve the prediction of coiled coil topology.
- Results have major implications for the rational design of coiled coils in various applications.
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