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- W4200202954 abstract "The Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) is a unique channel-forming member of the ATP Binding Cassette (ABC) superfamily of transporters. The phosphorylation and nucleotide dependent chloride channel activity of CFTR has been frequently studied in whole cell systems and as single channels in excised membrane patches. Many Cystic Fibrosis-causing mutations have been shown to alter this activity. While a small number of purification protocols have been published, a fast reconstitution method that retains channel activity and a suitable method for studying population channel activity in a purified system have been lacking. Here rapid methods are described for purification and functional reconstitution of the full-length CFTR protein into proteoliposomes of defined lipid composition that retains activity as a regulated halide channel. This reconstitution method together with a novel flux-based assay of channel activity is a suitable system for studying the population channel properties of wild type CFTR and the disease-causing mutants F508del- and G551D-CFTR. Specifically, the method has utility in studying the direct effects of phosphorylation, nucleotides and small molecules such as potentiators and inhibitors on CFTR channel activity. The methods are also amenable to the study of other membrane channels/transporters for anionic substrates." @default.
- W4200202954 created "2021-12-31" @default.
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- W4200202954 date "2015-03-09" @default.
- W4200202954 modified "2023-09-25" @default.
- W4200202954 title "Functional Reconstitution and Channel Activity Measurements of Purified Wildtype and Mutant CFTR Protein" @default.
- W4200202954 doi "https://doi.org/10.3791/52427-v" @default.
- W4200202954 hasPublicationYear "2015" @default.
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