Cystic fibrosis transmembrane conductance regulator (CFTR) nucleotide-binding domain one (NBD1) apo

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.231 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Structure of nucleotide-binding domain 1 of the cystic fibrosis transmembrane conductance regulator.

Lewis, H.A.Buchanan, S.G.Burley, S.K.Conners, K.Dickey, M.Dorwart, M.Fowler, R.Gao, X.Guggino, W.B.Hendrickson, W.A.Hunt, J.F.Kearins, M.C.Lorimer, D.Maloney, P.C.Post, K.W.Rajashankar, K.R.Rutter, M.E.Sauder, J.M.Shriver, S.Thibodeau, P.H.Thomas, P.J.Zhang, M.Zhao, X.Emtage, S.

(2004) EMBO J 23: 282-293

  • DOI: https://doi.org/10.1038/sj.emboj.7600040
  • Primary Citation of Related Structures:  
    1Q3H, 1R0W, 1R0X, 1R0Y, 1R0Z, 1R10

  • PubMed Abstract: 

    Cystic fibrosis transmembrane conductance regulator (CFTR) is an ATP-binding cassette (ABC) transporter that functions as a chloride channel. Nucleotide-binding domain 1 (NBD1), one of two ABC domains in CFTR, also contains sites for the predominant CF-causing mutation and, potentially, for regulatory phosphorylation. We have determined crystal structures for mouse NBD1 in unliganded, ADP- and ATP-bound states, with and without phosphorylation. This NBD1 differs from typical ABC domains in having added regulatory segments, a foreshortened subdomain interconnection, and an unusual nucleotide conformation. Moreover, isolated NBD1 has undetectable ATPase activity and its structure is essentially the same independent of ligand state. Phe508, which is commonly deleted in CF, is exposed at a putative NBD1-transmembrane interface. Our results are consistent with a CFTR mechanism, whereby channel gating occurs through ATP binding in an NBD1-NBD2 nucleotide sandwich that forms upon displacement of NBD1 regulatory segments.

  • Organizational Affiliation

    Structural GenomiX Inc., San Diego, CA, USA. hal_lewis@stromix.com

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cystic fibrosis transmembrane conductance regulator
A, B, C, D
286Mus musculusMutation(s): 0 
Gene Names: CFTR OR ABCC7
Find proteins for P26361 (Mus musculus)
Explore P26361 
Go to UniProtKB:  P26361
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP26361
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.231 
  • Space Group: P 4 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 172.247α = 90
b = 172.247β = 90
c = 110.233γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-12-09
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2021-02-03
    Changes: Database references, Derived calculations, Structure summary
  • Version 1.4: 2024-02-14
    Changes: Data collection, Database references