Investigating Alternative Transport of Integral Plasma Membrane Proteins from the ER to the Golgi: Lessons from the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR).

Secretory traffic became a topical field because many important cell regulators are plasma membrane proteins (transporters, channels, receptors), being thus key targets in biomedicine and drug discovery. Cystic fibrosis (CF), caused by defects in a single gene encoding the CF transmembrane conductance regulator (CFTR), constitutes the most common of rare diseases and certainly a paradigmatic one.Here we focus on five different approaches that allow biochemical and cellular characterization of CFTR from its co-translational insertion into the ER membrane to its delivery to the plasma membrane.