ArticleProceedings of the National Academy of Sciences of the United States of America2010
ATP-independent CFTR channel gating and allosteric modulation by phosphorylation.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers.
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Who cites it
53 citing papers in PubMed, 87 citations in OpenAlex.
- Inactivation Switch for Run-up in TRPV2.Research square · 2026Article
- Lipid transporters E-Syt3 and ORP5 regulate epithelial ion transport by controlling phosphatidylserine enrichment at ER/PM junctions.The EMBO journal · 2025Article
- ATP-dependent thermoring basis for the heat unfolding of the first nucleotide-binding domain isolated from human CFTR.Research square · 2024Article
- Ribosomal frameshifting selectively modulates the assembly, function, and pharmacological rescue of a misfolded CFTR variant.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Novel gain-of-function mutants identify a critical region within CFTR membrane-spanning domain 2 controlling cAMP-dependent and ATP-independent channel activation.Cellular and molecular life sciences : CMLS · 2024Article
- Ribosomal Frameshifting Selectively Modulates the Assembly, Function, and Pharmacological Rescue of a Misfolded CFTR Variant.bioRxiv : the preprint server for biology · 2024Article
- Current landscape of cystic fibrosis gene therapy.Frontiers in pharmacology · 2024Review
- Article
- Folding correctors can restore CFTR posttranslational folding landscape by allosteric domain-domain coupling.Nature communications · 2023Article
- Expression of gain-of-function CFTR in cystic fibrosis airway cells restores epithelial function better than wild-type or codon-optimized CFTR.Molecular therapy. Methods & clinical development · 2023Article
- The synthetic aminoglycoside ELX-02 induces readthrough of G550X-CFTR producing superfunctional protein that can be further enhanced by CFTR modulators.American journal of physiology. Lung cellular and molecular physiology · 2023Article
- Article
- A review of the pathophysiology and the role of ion channels on bronchial asthma.Frontiers in pharmacology · 2023Review
- Acting on the CFTR Membrane-Spanning Domains Interface Rescues Some Misfolded Mutants.International journal of molecular sciences · 2022Article
- Molecular mechanisms of cystic fibrosis - how mutations lead to misfunction and guide therapy.Bioscience reports · 2022Review
- The molecular evolution of function in the CFTR chloride channel.The Journal of general physiology · 2021Article
- G551D mutation impairs PKA-dependent activation of CFTR channel that can be restored by novel GOF mutations.American journal of physiology. Lung cellular and molecular physiology · 2020Article
- VX-770-mediated potentiation of numerous human CFTR disease mutants is influenced by phosphorylation level.Scientific reports · 2019Article
- Sites associated with Kalydeco binding on human Cystic Fibrosis Transmembrane Conductance Regulator revealed by Hydrogen/Deuterium Exchange.Scientific reports · 2018Article
- Molecular dynamics simulation study on the structural instability of the most common cystic fibrosis-associated mutant ΔF508-CFTR.Biophysics and physicobiology · 2018Article
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Authors and funding
7 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Cystic fibrosis (CF) is caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) channel, an ATP binding cassette (ABC) transporter. CFTR gating is linked to ATP binding and dimerization of its two nucleotide binding domains (NBDs). Channel activation also requires phosphorylation of the R domain by poorly understood mechanisms. Unlike conventional ligand-gated channels, CFTR is an ATPase for which ligand (ATP) release typically involves nucleotide hydrolysis. The extent to which CFTR gating conforms to classic allosteric schemes of ligand activation is unclear. Here, we describe point mutations in the CFTR cytosolic loops that markedly increase ATP-independent (constitutive) channel activity. This finding is consistent with an allosteric gating mechanism in which ligand shifts the equilibrium between inactive and active states but is not essential for channel opening. Constitutive mutations mapped to the putative symmetry axis of CFTR based on the crystal structures of related ABC transporters, a common theme for activating mutations in ligand-gated channels. Furthermore, the ATP sensitivity of channel activation was strongly enhanced by these constitutive mutations, as predicted for an allosteric mechanism (reciprocity between protein activation and ligand occupancy). Introducing constitutive mutations into CFTR channels that cannot open in response to ATP (i.e., the G551D CF mutant and an NBD2-deletion mutant) substantially rescued their activities. Importantly, constitutive mutants that opened without ATP or NBD2 still required R domain phosphorylation for optimal activity. Our results confirm that (i) CFTR gating exhibits features of protein allostery that are shared with conventional ligand-gated channels and (ii) the R domain modulates CFTR activity independent of ATP-induced NBD dimerization.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.