CFTR chloride channel regulation by an interdomain interaction

Anjaparavanda P. Naren, Estelle Cormet-Boyaka, Jian Fu, Matteo Villain, J. Edwin Blalock, Michael W. Quick, Kevin L. Kirk

Research output: Contribution to journalArticlepeer-review

121 Scopus citations


The cystic fibrosis gene encodes a chloride channel CFTR (cystic fibrosis transmembrane conductance regulator), that regulates salt and water transport across epithelial tissues. Phosphorylation of the cytoplasmic regulatory (R) domain by protein kinase A activates CFTR by an unknown mechanism. The amino-terminal cytoplasmic tail of CFTR was found to control protein kinase A-dependent channel gating through a physical interaction with the R domain. This regulatory activity mapped to a cluster of acidic residues in the NH2-terminal tail; mutating these residues proportionately inhibited R domain binding and CFTR channel function. CFTR activity appears to be governed by an interdomain interaction involving the amino-terminal tail which is a potential target for physiologic and pharmacologic modulators of this ion channel.

Original languageEnglish
Pages (from-to)544-548
Number of pages5
Issue number5439
StatePublished - Oct 15 1999

ASJC Scopus subject areas

  • General


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