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Cited by 263

The DOI matches its Crossref record; 23 of the 23 references it cites were found in a registry or an index.

Regulation of the gating of cystic fibrosis transmembrane conductance regulator C1 channels by phosphorylation and ATP hydrolysis.

Open access
Hwang, T C, Nagel, G, Nairn, A C, Gadsby, D C·1994·Proceedings of the National Academy of Sciences

Abstract

Opening of cystic fibrosis transmembrane conductance regulator (CFTR) Cl channels requires their phosphorylation by protein kinase A followed by exposure to ATP. We examined the interaction between nucleotides and phosphorylated CFTR channels by recording currents in intact cardiac myocytes and in excised patches. We found that, although the hydrolysis-resistant ATP analogue 5'-adenosine(beta,gamma- imino)triphosphate (AMP-PNP) cannot open phosphorylated CFTR channels, it can cause channels opened by ATP to remain open for many minutes. This suggests that ATP action at one site on CFTR is a prerequisite for AMP-PNP action at a second site. However, this action of AMP-PNP is restricted to highly phosphorylated CFTR channels, which, in the presence of ATP, display a relatively high open probability, but is not seen in partially phosphorylated CFTR channels, which have a low open probability in the presence of ATP. Our findings argue that incremental phosphorylation differentially regulates the interactions between nucleotides and the two nucleotide binding domains of CFTR. The nature of those interactions suggests that ATP hydrolysis at one nucleotide binding domain controls channel opening and ATP hydrolysis at the other regulates channel closing.

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Metadata

Authors
Hwang, T. C., Nagel, G., Nairn, A. C., & Gadsby, D. C.
Venue
Proceedings of the National Academy of Sciences
Published
1994-05-24
Volume
91
Issue
11
Pages
4698-4702
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2082244393
Cited by
263
References
23
FWCI
25.90
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Regulation of the gating of cystic fibrosis transmembrane conductance regulator C1 channels by phosphorylation and ATP hydrolysis. https://app.cochat.ai/papers/10.1073/pnas.91.11.4698
The paper
Hwang, T. C., Nagel, G., Nairn, A. C., & Gadsby, D. C. (1994). Regulation of the gating of cystic fibrosis transmembrane conductance regulator C1 channels by phosphorylation and ATP hydrolysis. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.91.11.4698

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.