2LOB

PDZ Domain of CAL (Cystic Fibrosis Transmembrane Regulator-Associated Ligand)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 
  • Selection Criteria: structures with the lowest energy 

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Literature

Association of the cystic fibrosis transmembrane regulator with CAL: structural features and molecular dynamics.

Piserchio, A.Fellows, A.Madden, D.R.Mierke, D.F.

(2005) Biochemistry 44: 16158

  • DOI: 10.1021/bi0516475
  • Primary Citation of Related Structures:  
    2LOB

  • PubMed Abstract: 
  • The association of the cystic fibrosis transmembrane regulator (CFTR) with two PDZ-containing molecular scaffolds (CAL and EBP50) plays an important role in CFTR trafficking and membrane maintenance. The CFTR-molecular scaffold interaction is mediate ...

    The association of the cystic fibrosis transmembrane regulator (CFTR) with two PDZ-containing molecular scaffolds (CAL and EBP50) plays an important role in CFTR trafficking and membrane maintenance. The CFTR-molecular scaffold interaction is mediated by the association of the C-terminus of the transmembrane regulator with the PDZ domains. Here, we characterize the structure and dynamics of the PDZ of CAL and the complex formed with CFTR employing high-resolution NMR. On the basis of NMR relaxation data, the alpha2 helix as well as the beta2-beta3 loop of CAL PDZ domain undergoes rapid dynamics. Molecular dynamics simulations suggest a concerted motion between the alpha2 helix and the beta1-beta2 and beta2-beta3 loops, elements which define the binding pocket, suggesting that dynamics may play a role in PDZ-ligand specificity. The C-terminus of CFTR binds to CAL with the final four residues (-D(-)(3)-T-R-L(0)) within the canonical PDZ-binding motif, between the beta2 strand and the alpha2 helix. The R(-)(1) and D(-)(3) side chains make a number of contacts with the PDZ domain; many of these interactions differ from those in the CFTR-EBP50 complex, suggesting sites that can be targeted in the development of PDZ-selective inhibitors that may help modulate CFTR function.


    Organizational Affiliation

    Department of Molecular Pharmacology, Division of Biology and Medicine, Brown University, Providence, Rhode Island 02912, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Golgi-associated PDZ and coiled-coil motif-containing proteinA112Homo sapiensMutation(s): 0 
Gene Names: GOPCCALFIG
Find proteins for Q9HD26 (Homo sapiens)
Explore Q9HD26 
Go to UniProtKB:  Q9HD26
NIH Common Fund Data Resources
PHAROS  Q9HD26
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Cystic fibrosis transmembrane conductance regulatorB8Homo sapiensMutation(s): 0 
Gene Names: CFTRABCC7
EC: 3.6.3.49 (PDB Primary Data), 5.6.1.6 (UniProt)
Find proteins for P13569 (Homo sapiens)
Explore P13569 
Go to UniProtKB:  P13569
NIH Common Fund Data Resources
PHAROS  P13569
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2LOB Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-06-13
    Type: Initial release