2RHP

The Thrombospondin-1 Polymorphism Asn700Ser Associated with Cornoary Artery Disease Causes Local and Long-Ranging Changes in Protein Structure


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.227 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Influences of the N700S Thrombospondin-1 Polymorphism on Protein Structure and Stability.

Carlson, C.B.Liu, Y.Keck, J.L.Mosher, D.F.

(2008) J.Biol.Chem. 283: 20069-20076

  • DOI: 10.1074/jbc.M800223200

  • PubMed Abstract: 
  • Thrombospondins (THBSs) are multimodular, secreted proteins characterized by a signature domain comprising a unique set of 13 calcium-binding repeats flanked by epidermal growth factor (EGF)-like and lectin-like modules. A polymorphism that changes a ...

    Thrombospondins (THBSs) are multimodular, secreted proteins characterized by a signature domain comprising a unique set of 13 calcium-binding repeats flanked by epidermal growth factor (EGF)-like and lectin-like modules. A polymorphism that changes a conserved Asn to Ser at residue 700 in the most N-terminal calcium-binding repeat of THBS-1 (repeat 1C) is found in 8-10% of European populations and has been linked to increased risk of premature coronary artery disease. The Ser substitution leads to altered stability in the EGF-like and wire modules of the THBS-1 signature domain as assessed by differential scanning calorimetry carried out in 2 mm or 200 mum calcium. Studies of the melting profiles of the THBS-2 signature domain proteins with Asn or Ser at position 702 (homologous to 700 in THBS-1) revealed that the impact of the Ser allele is similar in both THBS-1 and THBS-2. Structure determination of the Ser(702) THBS-2 variant in 2 mm calcium showed that repeat 1C contains two bound calcium ions as in the crystal of the Asn(702) protein, including the ion that is coordinated by Asn(702), and is associated with changes in conformation of repeat 1C and the adjacent EGF-like modules. The Ser substitution leads to the decreased ability of soluble THBS-2 signature domain protein to bind 4B6.13, a conformation-sensitive monoclonal antibody that recognizes an epitope in repeat 1C. These results indicate that although THBS harboring the Ser allele binds a full complement of calcium ions, repeat 1C is altered, leading to destabilization of surrounding structures.


    Organizational Affiliation

    Department of Medicine and Biomolecular Chemistry, University of Wisconsin, Madison, WI 53706, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thrombospondin-2
A
622Homo sapiensMutation(s): 1 
Gene Names: THBS2 (TSP2)
Find proteins for P35442 (Homo sapiens)
Go to Gene View: THBS2
Go to UniProtKB:  P35442
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.227 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 93.892α = 90.00
b = 122.650β = 90.00
c = 155.381γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
REFMACrefinement
HKL-2000data scaling
HKL-2000data collection
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-05-27
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Non-polymer description, Version format compliance
  • Version 1.2: 2017-10-11
    Type: Data collection, Refinement description