Phosphorylated, ATP-bound structure of zebrafish cystic fibrosis transmembrane conductance regulator (CFTR)

Experimental Data Snapshot

  • Resolution: 3.37 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.3 of the entry. See complete history


Conformational Changes of CFTR upon Phosphorylation and ATP Binding.

Zhang, Z.Liu, F.Chen, J.

(2017) Cell 170: 483-491.e8

  • DOI: https://doi.org/10.1016/j.cell.2017.06.041
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The cystic fibrosis transmembrane conductance regulator (CFTR) is an anion channel evolved from an ATP-binding cassette transporter. CFTR channel gating is strictly coupled to phosphorylation and ATP hydrolysis. Previously, we reported essentially identical structures of zebrafish and human CFTR in the dephosphorylated, ATP-free form. Here, we present the structure of zebrafish CFTR in the phosphorylated, ATP-bound conformation, determined by cryoelectron microscopy to 3.4 Å resolution. Comparison of the two conformations shows major structural rearrangements leading to channel opening. The phosphorylated regulatory domain is disengaged from its inhibitory position; the nucleotide-binding domains (NBDs) form a "head-to-tail" dimer upon binding ATP; and the cytoplasmic pathway, found closed off in other ATP-binding cassette transporters, is cracked open, consistent with CFTR's unique channel function. Unexpectedly, the extracellular mouth of the ion pore remains closed, indicating that local movements of the transmembrane helices can control ion access to the pore even in the NBD-dimerized conformation.

  • Organizational Affiliation

    Laboratory of Membrane Biophysics and Biology, The Rockefeller University, New York, NY, USA; Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cystic fibrosis transmembrane conductance regulator1,494Danio rerioMutation(s): 1 
Gene Names: cftr
Membrane Entity: Yes 
Find proteins for Q1LX78 (Danio rerio)
Explore Q1LX78 
Go to UniProtKB:  Q1LX78
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ1LX78
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.37 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-07-19
    Type: Initial release
  • Version 1.1: 2017-08-09
    Changes: Database references
  • Version 1.2: 2018-07-18
    Changes: Data collection
  • Version 1.3: 2024-03-13
    Changes: Data collection, Database references