4C2B

Crystal Structure of High-Affinity von Willebrand Factor A1 domain with Disulfide Mutation in Complex with High Affinity GPIb alpha

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.253 
  • R-Value Observed: 0.257 

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This is version 1.3 of the entry. See complete history. 


Literature

Towards the Structural Basis of Regulation of Von Willebrand Factor Binding to Glycoprotein Ib

Blenner, M.A., Dong, X., Springer, T.A.

(2014) J Biol Chem 289: 5565

  • DOI: 10.1074/jbc.M113.511220
  • Primary Citation of Related Structures:  
    4C2A, 4C2B, 4C29

  • PubMed Abstract: 

    • Activation by elongational flow of von Willebrand factor (VWF) is critical for primary hemostasis. Mutations causing type 2B von Willebrand disease (VWD), platelet-type VWD (PT-VWD), and tensile force each increase affinity of the VWF A1 domain and plate ...

    Activation by elongational flow of von Willebrand factor (VWF) is critical for primary hemostasis. Mutations causing type 2B von Willebrand disease (VWD), platelet-type VWD (PT-VWD), and tensile force each increase affinity of the VWF A1 domain and platelet glycoprotein Ibα (GPIbα) for one another; however, the structural basis for these observations remains elusive. Directed evolution was used to discover a further gain-of-function mutation in A1 that shifts the long range disulfide bond by one residue. We solved multiple crystal structures of this mutant A1 and A1 containing two VWD mutations complexed with GPIbα containing two PT-VWD mutations. We observed a gained interaction between A1 and the central leucine-rich repeats (LRRs) of GPIbα, previously shown to be important at high shear stress, and verified its importance mutationally. These findings suggest that structural changes, including central GPIbα LRR-A1 contact, contribute to VWF affinity regulation. Among the mutant complexes, variation in contacts and poor complementarity between the GPIbα β-finger and the region of A1 harboring VWD mutations lead us to hypothesize that the structures are on a pathway to, but have not yet reached, a force-induced super high affinity state.

    Organizational Affiliation: 

    From the Program in Cellular and Molecular Medicine, Boston Children's Hospital and Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
VON WILLEBRAND FACTOR A, C, E, G215Homo sapiensMutation(s): 3 
Gene Names: VWF, F8VWF
Find proteins for P04275 (Homo sapiens)
Explore P04275 
Go to UniProtKB:  P04275
NIH Common Fund Data Resources
PHAROS:  P04275
GTEx:  ENSG00000110799
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PLATELET GLYCOPROTEIN IB ALPHA CHAIN B, D, F, H291Homo sapiensMutation(s): 4 
Gene Names: GP1BA
Find proteins for P07359 (Homo sapiens)
Explore P07359 
Go to UniProtKB:  P07359
NIH Common Fund Data Resources
PHAROS:  P07359
GTEx:  ENSG00000185245
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.253 
  • R-Value Observed: 0.257 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.53α = 90
b = 103.84β = 90.05
c = 119.93γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
SCALEPACKdata scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-01-08
    Type: Initial release
  • Version 1.1: 2014-01-15
    Changes: Database references
  • Version 1.2: 2014-01-29
    Changes: Data collection
  • Version 1.3: 2014-03-12
    Changes: Database references, Source and taxonomy