5BV8

G1324S mutation in von Willebrand Factor A1 domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.59 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.163 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Mutational Constraints on Local Unfolding Inhibit the Rheological Adaptation of von Willebrand Factor.

Tischer, A.Campbell, J.C.Machha, V.R.Moon-Tasson, L.Benson, L.M.Sankaran, B.Kim, C.Auton, M.

(2016) J.Biol.Chem. 291: 3848-3859

  • DOI: 10.1074/jbc.M115.703850

  • PubMed Abstract: 
  • Unusually large von Willebrand factor (VWF), the first responder to vascular injury in primary hemostasis, is designed to capture platelets under the high shear stress of rheological blood flow. In type 2M von Willebrand disease, two rare mutations ( ...

    Unusually large von Willebrand factor (VWF), the first responder to vascular injury in primary hemostasis, is designed to capture platelets under the high shear stress of rheological blood flow. In type 2M von Willebrand disease, two rare mutations (G1324A and G1324S) within the platelet GPIbα binding interface of the VWF A1 domain impair the hemostatic function of VWF. We investigate structural and conformational effects of these mutations on the A1 domain's efficacy to bind collagen and adhere platelets under shear flow. These mutations enhance the thermodynamic stability, reduce the rate of unfolding, and enhance the A1 domain's resistance to limited proteolysis. Collagen binding affinity is not significantly affected indicating that the primary stabilizing effect of these mutations is to diminish the platelet binding efficiency under shear flow. The enhanced stability stems from the steric consequences of adding a side chain (G1324A) and additionally a hydrogen bond (G1324S) to His(1322) across the β2-β3 hairpin in the GPIbα binding interface, which restrains the conformational degrees of freedom and the overall flexibility of the native state. These studies reveal a novel rheological strategy in which the incorporation of a single glycine within the GPIbα binding interface of normal VWF enhances the probability of local unfolding that enables the A1 domain to conformationally adapt to shear flow while maintaining its overall native structure.


    Organizational Affiliation

    From the Division of Hematology, Departments of Internal Medicine and Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota 55905.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
von Willebrand factor
A
249Homo sapiensMutation(s): 1 
Gene Names: VWF (F8VWF)
Find proteins for P04275 (Homo sapiens)
Go to Gene View: VWF
Go to UniProtKB:  P04275
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.59 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.163 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 86.450α = 90.00
b = 86.450β = 90.00
c = 68.160γ = 120.00
Software Package:
Software NamePurpose
Aimlessdata scaling
iMOSFLMdata reduction
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-12-23
    Type: Initial release
  • Version 1.1: 2015-12-30
    Type: Database references
  • Version 1.2: 2016-03-02
    Type: Database references
  • Version 1.3: 2016-12-07
    Type: Database references, Other