The reconstitution of large amounts of integral proteins into lipid vesicles is largely prompted by the complexity of most biological membranes and protein stability. We optimized a particular system which maximized the incorporation efficiency of large soluble amounts of KcsA potassium channel in Escherichia coli membranes. The effects of two detergents, octylglucoside and 3-[(cholamidopropyl)-dimethyl-ammonio]-1-propanesulfonate (CHAPS), on KcsA reconstitution were compared. Reconstitution efficiency was found to be incredibly high for CHAPS-treated proteoliposomes followed by dialysis at room temperature. This approach may allow more accurate investigation of integral membrane proteins in their natural membrane environment via biophysical or biochemical techniques.
The Journal of Membrane Biology – Springer Journals
Published: May 15, 2011
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