1GQ5

Structural Determinants of the NHERF Interaction with beta2-AR and PDGFR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural Determinants of the Na+/H+ Exchanger Regulatory Factor Interaction with the Beta 2 Adrenergic and Platelet-Derived Growth Factor Receptors

Karthikeyan, S.Leung, T.Ladias, J.A.A.

(2002) J Biol Chem 277: 18973

  • DOI: 10.1074/jbc.M201507200
  • Primary Citation of Related Structures:  
    1GQ5, 1GQ4

  • PubMed Abstract: 
  • The Na(+)/H(+) exchanger regulatory factor (NHERF) binds through its PDZ1 domain to the carboxyl-terminal sequences NDSLL and EDSFL of the beta(2) adrenergic receptor (beta(2)AR) and platelet-derived growth factor receptor, respectively, and plays a ...

    The Na(+)/H(+) exchanger regulatory factor (NHERF) binds through its PDZ1 domain to the carboxyl-terminal sequences NDSLL and EDSFL of the beta(2) adrenergic receptor (beta(2)AR) and platelet-derived growth factor receptor, respectively, and plays a critical role in the membrane localization and physiological regulation of these receptors. The crystal structures of the human NHERF PDZ1 domain bound to the sequences NDSLL and EDSFL have been determined at 1.9- and 2.2-A resolution, respectively. The beta(2)AR and platelet-derived growth factor receptor ligands insert into the PDZ1 binding pocket by a beta-sheet augmentation process and are stabilized by largely similar networks of hydrogen bonds and hydrophobic contacts. In the PDZ1-beta(2)AR complex, the side chain of asparagine at position -4 in the beta(2)AR peptide forms two additional hydrogen bonds with Gly(30) of PDZ1, which contribute to the higher affinity of this interaction. Remarkably, both complexes are further stabilized by hydrophobic interactions involving the side chains of the penultimate amino acids of the peptide ligands, whereas the PDZ1 residues Asn(22) and Glu(43) undergo conformational changes to accommodate these side chains. These results provide structural insights into the mechanisms by which different side chains at the position -1 of peptide ligands interact with PDZ domains and contribute to the affinity of the PDZ-ligand interaction.


    Related Citations: 
    • Structural Basis of the Na+/H+ Exchanger Regulatory Factor Pdz1 Interaction with the Carboxyl-Terminal Region of the Cystic Fibrosis Transmembrabe Conductance Regulator
      Karthikeyan, S., Leung, T., Ladias, J.A.A.
      (2001) J Biol Chem 276: 19683
    • Crystal Structure of the Pdz1 Domain of Human Na+/ H+ Exchanger Regulatory Factor Provides Insights Into the Mechanism of Carboxyl-Terminal Leucine Recognition by Class I Pdz Domains
      Karthikeyan, S., Leung, T., Birrane, G., Webster, G., Ladias, J.A.A.
      (2001) J Mol Biol 308: 963

    Organizational Affiliation

    Molecular Medicine Laboratory and Macromolecular Crystallography Unit, Division of Experimental Medicine, Harvard Institutes of Medicine, Harvard Medical School, Boston, Massachusetts 02115, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
EZRIN-RADIXIN-MOESIN BINDING PHOSPHOPROTEIN-50A91Homo sapiensMutation(s): 0 
Gene Names: SLC9A3R1NHERFNHERF1
Find proteins for O14745 (Homo sapiens)
Explore O14745 
Go to UniProtKB:  O14745
NIH Common Fund Data Resources
PHAROS  O14745
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.225 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.073α = 90
b = 50.073β = 90
c = 66.68γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-11-14
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance