Related Experiment Video
Updated: May 14, 2026
12:13
TransFLP — A Method to Genetically Modify Vibrio cholerae Based on Natural Transformation and FLP-recombination
Published on: October 8, 2012
Engineered Coiled-Coils Convert Cholera Toxin B-Pentamers into Programmable Membrane Fusogens
Wenyue Dai1,2, Erik Kempmann3,4, Francesca Rosato3,4
1School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K.
ACS Nano
|May 13, 2026
Summary
Researchers engineered cholera toxin B-subunit (CTB) into a programmable membrane fusogen. Linker length, not coiled-coil orientation, determined fusion efficiency, offering a new strategy for bioengineering membrane fusion.
Area of Science:
- Biochemistry
- Bioengineering
- Molecular Biology
Background:
- Membrane fusion is crucial for biological processes and bioengineering applications.
- Limited design principles exist for programming protein-driven membrane fusion at specific interfaces.
Purpose of the Study:
- To re-engineer the cholera toxin B-subunit (CTB) into a programmable membrane fusogen.
- To investigate the role of linker architecture and length in CTB-mediated membrane fusion.
Main Methods:
- CTB was engineered into dimers using coiled-coil linkers with defined parallel and antiparallel architectures.
- Fusion of giant unilamellar vesicles (GUVs) was assessed using FRET-based lipid mixing assays.
- Mechanistic insights were gained through flow cytometry, confocal microscopy, and QCM-D.
Main Results:
- Both parallel and antiparallel CTB dimers induced membrane cross-linking and full fusion.
- Fusogenic efficiency was primarily dictated by the length of the CTA2 linker, not the coiled-coil orientation.
- A generalizable strategy for engineering tunable lectin-based fusogens was established.
Conclusions:
- Linker geometry is a key design parameter for engineering fusogenic proteins.
- This work advances programmable membrane fusion platforms for applications like drug delivery and synthetic cells.
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