Dephosphorylated human delta F508 cystic fibrosis transmembrane conductance regulator (CFTR)

Experimental Data Snapshot

  • Resolution: 6.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report

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Molecular structures reveal synergistic rescue of Delta 508 CFTR by Trikafta modulators.

Fiedorczuk, K.Chen, J.

(2022) Science 378: 284-290

  • DOI: https://doi.org/10.1126/science.ade2216
  • Primary Citation of Related Structures:  
    8EIG, 8EIO, 8EIQ, 8EJ1

  • PubMed Abstract: 

    The predominant mutation causing cystic fibrosis, a deletion of phenylalanine 508 (Δ508) in the cystic fibrosis transmembrane conductance regulator (CFTR), leads to severe defects in CFTR biogenesis and function. The advanced therapy Trikafta combines the folding corrector tezacaftor (VX-661), the channel potentiator ivacaftor (VX-770), and the dual-function modulator elexacaftor (VX-445). However, it is unclear how elexacaftor exerts its effects, in part because the structure of Δ508 CFTR is unknown. Here, we present cryo-electron microscopy structures of Δ508 CFTR in the absence and presence of CFTR modulators. When used alone, elexacaftor partially rectified interdomain assembly defects in Δ508 CFTR, but when combined with a type I corrector, did so fully. These data illustrate how the different modulators in Trikafta synergistically rescue Δ508 CFTR structure and function.

  • Organizational Affiliation

    Laboratory of Membrane Biology and Biophysics, The Rockefeller University, New York, NY 10065, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cystic fibrosis transmembrane conductance regulator1,479Homo sapiensMutation(s): 1 
Gene Names: CFTRABCC7
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P13569 (Homo sapiens)
Explore P13569 
Go to UniProtKB:  P13569
PHAROS:  P13569
GTEx:  ENSG00000001626 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP13569
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 6.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Howard Hughes Medical Institute (HHMI)United States--
Cystic Fibrosis FoundationUnited States--

Revision History  (Full details and data files)

  • Version 1.0: 2022-10-19
    Type: Initial release
  • Version 1.1: 2022-11-09
    Changes: Database references