4GVD

Crystal Structure of T-cell Lymphoma Invasion and Metastasis-1 PDZ in complex with Syndecan1 Peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The structure of the Tiam1 PDZ domain/ phospho-syndecan1 complex reveals a ligand conformation that modulates protein dynamics.

Liu, X.Shepherd, T.R.Murray, A.M.Xu, Z.Fuentes, E.J.

(2013) Structure 21: 342-354

  • DOI: 10.1016/j.str.2013.01.004
  • Primary Citation of Related Structures:  
    4GVC, 4GVD

  • PubMed Abstract: 
  • PDZ (PSD-95/Dlg/ZO-1) domains are protein-protein interaction modules often regulated by ligand phosphorylation. Here, we investigated the specificity, structure, and dynamics of Tiam1 PDZ domain/ligand interactions. We show that the PDZ domain specifically binds syndecan1 (SDC1), phosphorylated SDC1 (pSDC1), and SDC3 but not other syndecan isoforms ...

    PDZ (PSD-95/Dlg/ZO-1) domains are protein-protein interaction modules often regulated by ligand phosphorylation. Here, we investigated the specificity, structure, and dynamics of Tiam1 PDZ domain/ligand interactions. We show that the PDZ domain specifically binds syndecan1 (SDC1), phosphorylated SDC1 (pSDC1), and SDC3 but not other syndecan isoforms. The crystal structure of the PDZ/SDC1 complex indicates that syndecan affinity is derived from amino acids beyond the four C-terminal residues. Remarkably, the crystal structure of the PDZ/pSDC1 complex reveals a binding pocket that accommodates the phosphoryl group. Methyl relaxation experiments of PDZ/SCD1 and PDZ/pSDC1 complexes reveal that PDZ-phosphoryl interactions dampen dynamic motions in a distal region of the PDZ domain by decoupling them from the ligand-binding site. Our data are consistent with a selection model by which specificity and phosphorylation regulate PDZ/syndecan interactions and signaling events. Importantly, our relaxation data demonstrate that PDZ/phospho-ligand interactions regulate protein dynamics and their coupling to distal sites.


    Organizational Affiliation

    Department of Biochemistry, University of Iowa, Carver College of Medicine, Iowa City, IA 52242, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
T-lymphoma invasion and metastasis-inducing protein 1AB94Homo sapiensMutation(s): 0 
Gene Names: TIAM1
Find proteins for Q13009 (Homo sapiens)
Explore Q13009 
Go to UniProtKB:  Q13009
NIH Common Fund Data Resources
PHAROS  Q13009
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Syndecan-1CD8Homo sapiensMutation(s): 0 
Gene Names: SDC1SDC
Find proteins for P18827 (Homo sapiens)
Explore P18827 
Go to UniProtKB:  P18827
NIH Common Fund Data Resources
PHAROS  P18827
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 26.517α = 90
b = 58.106β = 90.5
c = 50.948γ = 90
Software Package:
Software NamePurpose
StructureStudiodata collection
PHASERphasing
REFMACrefinement
d*TREKdata reduction
d*TREKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-03-13
    Type: Initial release
  • Version 1.1: 2015-05-27
    Changes: Database references