Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 13.52 kDa 
• Atom Count: 720 
• Residue Count: 94 
• Unique protein chains: 2

2LOB

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

• DOI: 10.2210/pdb2LOB/pdb
• BMRB: 18205

• Classification: PEPTIDE BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2012-01-20 Released: 2012-06-13 
• Deposition Author(s): Piserchio, A., Fellows, A., Madden, D.R., Mierke, D.F.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 7 
• Selection Criteria: structures with the lowest energy 

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

• PubMed: 16331976 
• 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 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Golgi-associated PDZ and coiled-coil motif-containing protein	A	112	Homo sapiens	Mutation(s): 0  Gene Names: GOPC, CAL, FIG
Find proteins for Q9HD26 (Homo sapiens) Explore Q9HD26  Go to UniProtKB:  Q9HD26
NIH Common Fund Data Resources
PHAROS:  Q9HD26 GTEx:  ENSG00000047932

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Cystic fibrosis transmembrane conductance regulator	B	8	Homo sapiens	Mutation(s): 0  Gene Names: CFTR, ABCC7 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 GTEx:  ENSG00000001626

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 7 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2LOB Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-01-20 
• Released Date: 2012-06-13 
Deposition Author(s): Piserchio, A., Fellows, A., Madden, D.R., Mierke, D.F.

Revision History 

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