1IQD

Human Factor VIII C2 Domain complexed to human monoclonal BO2C11 Fab.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.203 

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


Literature

Structure of a factor VIII C2 domain-immunoglobulin G4kappa Fab complex: identification of an inhibitory antibody epitope on the surface of factor VIII.

Spiegel Jr., P.C., Jacquemin, M., Saint-Remy, J.M., Stoddard, B.L., Pratt, K.P.

(2001) Blood 98: 13-19

  • DOI: https://doi.org/10.1182/blood.v98.1.13
  • Primary Citation of Related Structures:  
    1IQD

  • PubMed Abstract: 

    • The development of an immune response to infused factor VIII is a complication affecting many patients with hemophilia A. Inhibitor antibodies bind to antigenic determinants on the factor VIII molecule and block its procoagulant activity. A patient-derived inhibitory immunoglobulin G4kappa antibody (BO2C11) produced by an immortalized memory B-lymphocyte cell line interferes with the binding of factor VIII to phospholipid surfaces and to von Willebrand factor ...

    The development of an immune response to infused factor VIII is a complication affecting many patients with hemophilia A. Inhibitor antibodies bind to antigenic determinants on the factor VIII molecule and block its procoagulant activity. A patient-derived inhibitory immunoglobulin G4kappa antibody (BO2C11) produced by an immortalized memory B-lymphocyte cell line interferes with the binding of factor VIII to phospholipid surfaces and to von Willebrand factor. The structure of a Fab fragment derived from this antibody complexed with the factor VIII C2 domain was determined at 2.0 A resolution. The Fab interacts with solvent-exposed basic and hydrophobic side chains that form a membrane-association surface of factor VIII. This atomic resolution structure suggests a variety of amino acid substitutions in the C2 domain of factor VIII that might prevent the binding of anti-C2 inhibitor antibodies without significantly compromising the procoagulant functions of factor VIII.

    Related Citations: 
    • Structure of the C2 domain of human factor VIII at 1.5 A resolution
      Pratt, K.P., Shen, B.W., Takeshima, K., Davie, E.W., Fujikawa, K., Stoddard, B.L.
      (1999) Nature 402: 439
    • Hemophilic factor VIII C1- and C2-domain missense mutations and their modeling to the 1.5-angstrom human C2-domain crystal structure
      Liu, M.L., Shen, B.W., Nakaya, S., Pratt, K.P., Fujikawa, K., Davie, E.W., Stoddard, B.L., Thompson, A.R.
      (2000) Blood 96: 979
    Organizational Affiliation: 

    Graduate Program in Biomolecular Structure and Design, University of Washington, and Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HUMAN MONOCLONAL BO2C11 FAB LIGHT CHAINA211Homo sapiensMutation(s): 0 
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HUMAN MONOCLONAL BO2C11 FAB HEAVY CHAINB215Homo sapiensMutation(s): 0 
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
HUMAN FACTOR VIIIC156Homo sapiensMutation(s): 1 
Gene Names: F8, F8C
UniProt & NIH Common Fund Data Resources
Find proteins for P00451 (Homo sapiens)
Explore P00451 
Go to UniProtKB:  P00451
PHAROS:  P00451
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00451
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.203 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.535α = 90
b = 73.701β = 90
c = 112.395γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
XFITdata reduction
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-08-15
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-11-10
    Changes: Database references