Diffusional mobility of the cystic fibrosis transmembrane conductance regulator mutant, delta F508-CFTR, in the endoplasmic reticulum measured by photobleaching of GFP-CFTR chimeras.

Abstract excerpt

Mutations in the cystic fibrosis transmembrane conductance regulator protein (CFTR) cause cystic fibrosis. The most common disease-causing mutation, DeltaF508, is retained in the endoplasmic reticulum (ER) and is unable to function as a plasma membrane chloride channel. To investigate whether the ER retention of DeltaF508-CFTR is caused by immobilization and/or aggregation, we have measured the diffusional...

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