3LNY

Second PDZ domain from human PTP1E in complex with RA-GEF2 peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.163 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystallographic and nuclear magnetic resonance evaluation of the impact of peptide binding to the second PDZ domain of protein tyrosine phosphatase 1E.

Zhang, J.Sapienza, P.J.Ke, H.Chang, A.Hengel, S.R.Wang, H.Phillips, G.N.Lee, A.L.

(2010) Biochemistry 49: 9280-9291

  • DOI: 10.1021/bi101131f
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • PDZ (PSD95/Discs large/ZO-1) domains are ubiquitous protein interaction motifs found in scaffolding proteins involved in signal transduction. Despite the fact that many PDZ domains show a limited tendency to undergo structural change, the PDZ family ...

    PDZ (PSD95/Discs large/ZO-1) domains are ubiquitous protein interaction motifs found in scaffolding proteins involved in signal transduction. Despite the fact that many PDZ domains show a limited tendency to undergo structural change, the PDZ family has been associated with long-range communication and allostery. One of the PDZ domains studied most in terms of structure and biophysical properties is the second PDZ ("PDZ2") domain from protein tyrosine phosphatase 1E (PTP1E, also known as PTPL1). Previously, we showed through NMR relaxation studies that binding of the RA-GEF2 C-terminal peptide substrate results in long-range propagation of side-chain dynamic changes in human PDZ2 [Fuentes, E. J., et al. (2004) J. Mol. Biol. 335, 1105-1115]. Here, we present the first X-ray crystal structures of PDZ2 in the absence and presence of RA-GEF2 ligand, determined to resolutions of 1.65 and 1.3 Å, respectively. These structures deviate somewhat from previously determined NMR structures and indicate that very minor structural changes in PDZ2 accompany peptide binding. NMR residual dipolar couplings confirm the crystal structures to be accurate models of the time-averaged atomic coordinates of PDZ2. The impact on side-chain dynamics was further tested with a C-terminal peptide from APC, which showed results nearly identical to those of RA-GEF2. Thus, allosteric transmission in PDZ2 induced by peptide binding is conveyed purely and robustly by dynamics. (15)N relaxation dispersion measurements did not detect appreciable populations of a kinetic structural intermediate. Collectively, for ligand binding to PDZ2, these data support a lock-and-key binding model from a structural perspective and an allosteric model from a dynamical perspective, which together suggest a complex energy landscape for functional transitions within the ensemble.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tyrosine-protein phosphatase non-receptor type 13
A
96Homo sapiensMutation(s): 0 
Gene Names: PTPN13 (PNP1, PTP1E, PTPL1)
EC: 3.1.3.48
Find proteins for Q12923 (Homo sapiens)
Go to Gene View: PTPN13
Go to UniProtKB:  Q12923
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Rap guanine nucleotide exchange factor 6
B
6Homo sapiensMutation(s): 0 
Gene Names: RAPGEF6 (PDZGEF2)
Find proteins for Q8TEU7 (Homo sapiens)
Go to Gene View: RAPGEF6
Go to UniProtKB:  Q8TEU7
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SCN
Query on SCN

Download SDF File 
Download CCD File 
A
THIOCYANATE ION
C N S
ZMZDMBWJUHKJPS-UHFFFAOYSA-M
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.163 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 73.965α = 90.00
b = 73.965β = 90.00
c = 134.056γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
SCALEPACKdata scaling
HKL-2000data reduction
DENZOdata reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-03-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2016-09-28
    Type: Database references
  • Version 1.3: 2017-11-01
    Type: Refinement description