2VDN

Re-refinement of Integrin AlphaIIbBeta3 Headpiece Bound to Antagonist Eptifibatide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.166 

wwPDB Validation   3D Report Full Report



Literature

Structural Basis for Distinctive Recognition of Fibrinogen Gammac Peptide by the Platelet Integrin Alphaiibbeta3.

Springer, T.A.Zhu, J.Xiao, T.

(2008) J Cell Biol 182: 791

  • DOI: 10.1083/jcb.200801146
  • Primary Citation of Related Structures:  
    2VC2, 2VDP, 2VDQ, 2VDR, 2VDK, 2VDL, 2VDM, 2VDN, 2VDO

  • PubMed Abstract: 
  • Hemostasis and thrombosis (blood clotting) involve fibrinogen binding to integrin alpha(IIb)beta(3) on platelets, resulting in platelet aggregation. alpha(v)beta(3) binds fibrinogen via an Arg-Asp-Gly (RGD) motif in fibrinogen's alpha subunit. alpha( ...

    Hemostasis and thrombosis (blood clotting) involve fibrinogen binding to integrin alpha(IIb)beta(3) on platelets, resulting in platelet aggregation. alpha(v)beta(3) binds fibrinogen via an Arg-Asp-Gly (RGD) motif in fibrinogen's alpha subunit. alpha(IIb)beta(3) also binds to fibrinogen; however, it does so via an unstructured RGD-lacking C-terminal region of the gamma subunit (gammaC peptide). These distinct modes of fibrinogen binding enable alpha(IIb)beta(3) and alpha(v)beta(3) to function cooperatively in hemostasis. In this study, crystal structures reveal the integrin alpha(IIb)beta(3)-gammaC peptide interface, and, for comparison, integrin alpha(IIb)beta(3) bound to a lamprey gammaC primordial RGD motif. Compared with RGD, the GAKQAGDV motif in gammaC adopts a different backbone configuration and binds over a more extended region. The integrin metal ion-dependent adhesion site (MIDAS) Mg(2+) ion binds the gammaC Asp side chain. The adjacent to MIDAS (ADMIDAS) Ca(2+) ion binds the gammaC C terminus, revealing a contribution for ADMIDAS in ligand binding. Structural data from this natively disordered gammaC peptide enhances our understanding of the involvement of gammaC peptide and integrin alpha(IIb)beta(3) in hemostasis and thrombosis.


    Related Citations: 
    • Structural Basis for Allostery in Integrins and Binding to Fibrinogen-Mimetic Therapeutics
      Xiao, T., Takagi, J., Coller, B.S., Wang, J.-H., Springer, T.A.
      (2004) Nature 432: 59

    Organizational Affiliation

    Department of Pathology, Immune Disease Institute, Harvard Medical School, Boston, MA 02115, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
INTEGRIN ALPHA-IIBA452Homo sapiensMutation(s): 0 
Gene Names: ITGA2BGP2BITGAB
Find proteins for P08514 (Homo sapiens)
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Go to UniProtKB:  P08514
NIH Common Fund Data Resources
PHAROS  P08514
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
INTEGRIN BETA-3B461Homo sapiensMutation(s): 0 
Gene Names: ITGB3GP3A
Find proteins for P05106 (Homo sapiens)
Explore P05106 
Go to UniProtKB:  P05106
NIH Common Fund Data Resources
PHAROS  P05106
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
EPTIFIBATIDEC8synthetic constructMutation(s): 0 
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
MONOCLONAL ANTIBODY 10E5 HEAVY CHAINH221Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
MONOCLONAL ANTIBODY 10E5 LIGHT CHAINL214Mus musculusMutation(s): 0 
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 6
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
D
5 N-Glycosylation Oligosaccharides Interaction
Entity ID: 7
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
E
7 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download CCD File 
A, B
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A, B
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download CCD File 
B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
HRG
Query on HRG
CL-PEPTIDE LINKINGC7 H16 N4 O2ARG
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.166 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 149.593α = 90
b = 149.593β = 90
c = 175.683γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-09-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2016-12-28
    Changes: Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Other, Source and taxonomy, Structure summary
  • Version 1.3: 2019-01-30
    Changes: Data collection, Experimental preparation, Other
  • Version 1.4: 2019-02-06
    Changes: Data collection, Experimental preparation
  • Version 1.5: 2019-11-20
    Changes: Advisory, Derived calculations, Other
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary