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Protocol for stable cell line production to express muscle-type nicotinic receptor
Anna Li1, David B Sauer2, Yin Yao Dong3
1Centre for Medicines Discovery, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7FZ, UK; Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX3 9DS, UK.
STAR Protocols
|March 12, 2026
Summary
Researchers developed a new protocol to produce adult muscle-type nicotinic acetylcholine receptors (AChRs). This method enables sufficient protein production for cryo-electron microscopy (cryo-EM) studies.
Area of Science:
- Neuroscience
- Structural Biology
- Molecular Biology
Background:
- Adult muscle-type nicotinic acetylcholine receptors (AChRs) are crucial for neuromuscular transmission.
- Producing functional AChRs is challenging due to complex subunit assembly requirements.
Purpose of the Study:
- To establish a robust protocol for generating stable cell lines that co-express all four adult muscle-type nicotinic acetylcholine receptor subunits.
- To enable high-yield production of AChRs for structural and functional studies.
Main Methods:
- Development of a doxycycline-inducible system for co-expression of AChR subunits.
- Utilized lentivirus infection, puromycin selection, and fluorescence-activated cell sorting (FACS).
- Included clonal expansion and protein expression validation.
Main Results:
- Successfully generated stable cell lines capable of co-expressing all four adult muscle-type nicotinic acetylcholine receptor subunits.
- Achieved protein production yields suitable for single-particle cryo-electron microscopy (cryo-EM).
Conclusions:
- The presented protocol facilitates the production of adult muscle-type nicotinic acetylcholine receptors (AChRs) in quantities sufficient for cryo-EM.
- This method may be adaptable for producing other hetero-multimeric protein complexes.
