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Journal for Biophysical Chemistry

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Proteopolymersomes: In vitro production of a membrane protein in polymersome membranes


Polymersomes are stable self-assembled architectures which mimic cell membranes. For characterization, membrane proteins can be incorporated into such bio-mimetic membranes by reconstitution methods, leading to so-called proteopolymersomes. In this work, we demonstrate the direct incorporation of a membrane protein into polymersome membranes by a cell-free expression system. Firstly, we demonstrate pore formation in the preformed polymersome membrane using α-hemolysin. Secondly, we use claudin-2, a protein involved in cell-cell interactions, to demonstrate the in vitro expression of a membrane protein into these polymersomes. Surface plasmon resonance (Biacore) binding studies with the claudin-2 proteopolymersomes and claudin-2 specific antibodies are performed to show the presence of the in vitro expressed protein in polymersome membranes.


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Nallani, M., Andreasson-Ochsner, M., Tan, C.D. et al. Proteopolymersomes: In vitro production of a membrane protein in polymersome membranes. Biointerphases 6, 153–157 (2011).

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