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Updated: Mar 26, 2026

In Vitro Analysis of PDZ-dependent CFTR Macromolecular Signaling Complexes
Published on: August 13, 2012
Regulatory Crosstalk by Protein Kinases on CFTR Trafficking and Activity
Carlos M Farinha1, Agnieszka Swiatecka-Urban2, David L Brautigan3
1Faculty of Sciences, Biosystems and Integrative Sciences Institute, University of Lisboa Lisbon, Portugal.
Abstract:
Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) is a member of the ATP binding cassette (ABC) transporter superfamily that functions as a cAMP-activated chloride ion channel in fluid-transporting epithelia. There is abundant evidence that CFTR activity (i.e., channel opening and closing) is regulated by protein kinases and phosphatases via phosphorylation and dephosphorylation. Here, we review recent evidence for the role of protein kinases in regulation of CFTR delivery to and retention in the plasma membrane. We review this information in a broader context of regulation of other transporters by protein kinases because the overall functional output of transporters involves the integrated control of both their number at the plasma membrane and their specific activity. While many details of the regulation of intracellular distribution of CFTR and other transporters remain to be elucidated, we hope that this review will motivate research providing new insights into how protein kinases control membrane transport to impact health and disease.
Insights
Protein kinases regulate the cell surface presence of the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) channel. This review explores how kinases control CFTR delivery and retention, impacting epithelial transport and disease.
Area of Science:
- Biochemistry
- Cell Biology
- Physiology
Background:
- Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) is an ion channel crucial for epithelial fluid transport.
- CFTR function is modulated by phosphorylation, involving protein kinases and phosphatases.
- Understanding CFTR regulation is vital for addressing diseases like cystic fibrosis.
Purpose of the Study:
- To review recent evidence on protein kinase roles in CFTR trafficking to the plasma membrane.
- To contextualize CFTR regulation within the broader mechanisms controlling transporter abundance and activity.
- To stimulate research into kinase-mediated membrane transport regulation.
Main Methods:
- Literature review of recent scientific publications.
- Analysis of studies investigating protein kinase interactions with CFTR.
- Comparative analysis with regulation of other membrane transporters.
Main Results:
- Protein kinases play a significant role in regulating CFTR's delivery to and retention within the plasma membrane.
- Kinase-mediated control impacts the overall number and activity of membrane transporters.
- Specific details of CFTR intracellular trafficking regulation by kinases require further investigation.
Conclusions:
- Protein kinases are key regulators of CFTR cell surface expression.
- Integrated control of transporter number and activity by kinases is essential for physiological function.
- Further research into kinase-CFTR interactions may yield new therapeutic strategies for related diseases.
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