1AHW

A COMPLEX OF EXTRACELLULAR DOMAIN OF TISSUE FACTOR WITH AN INHIBITORY FAB (5G9)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 

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This is version 1.2 of the entry. See complete history. 


Literature

The mechanism of an inhibitory antibody on TF-initiated blood coagulation revealed by the crystal structures of human tissue factor, Fab 5G9 and TF.5G9 complex.

Huang, M., Syed, R., Stura, E.A., Stone, M.J., Stefanko, R.S., Ruf, W., Edgington, T.S., Wilson, I.A.

(1998) J Mol Biol 275: 873-894

  • DOI: 10.1006/jmbi.1997.1512
  • Primary Citation of Related Structures:  
    1FGN, 1TFH, 1AHW

  • PubMed Abstract: 

    • The tissue factor (TF)-initiated blood coagulation protease cascade can be greatly inhibited in vivo by a potent anti-human-TF monoclonal antibody, 5G9. This antibody binds the carboxyl module of the extracellular domain of TF with a nanomolar binding co ...

    The tissue factor (TF)-initiated blood coagulation protease cascade can be greatly inhibited in vivo by a potent anti-human-TF monoclonal antibody, 5G9. This antibody binds the carboxyl module of the extracellular domain of TF with a nanomolar binding constant and inhibits the formation of the TF.VIIa.X ternary initiation complex. We have determined the crystal structures of the extra-cellular modules of human TF, Fab 5G9, and their complex (TF.5G9) to 2.4 A, 2. 5 A, and 3.0 A, respectively, and measured the apparent inhibition constants of 5G9 on a panel of TF mutants. In our unliganded TF structure, a 7 degrees change in the relative orientation between the D1 and D2 modules was observed when compared with other published TF structures. Comparison of the free and bound Fab 5G9 indicates that small segmental and side chain variation of the antibody complementarity determining regions occurred on complexation with TF. The antibody-antigen recognition involves 18 TF antigen residues and 19 Fab residues from six CDR with one of the largest buried surface areas seen to date. A combination of structural and mutagenesis data indicate that Tyr156, Lys169, Arg200, and Lys201 play the major role in the antibody recognition. The TF. 5G9 structure provides insights into the mechanism by which the antibody 5G9 inhibits formation of the TF.VIIa.X ternary complex.

    Organizational Affiliation: 

    Department of Molecular Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92027, USA.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
IMMUNOGLOBULIN FAB 5G9 (LIGHT CHAIN) A, D214Mus musculusMutation(s): 0 
Gene Names: Igkc
Find proteins for P01837 (Mus musculus)
Explore P01837 
Go to UniProtKB:  P01837
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
IMMUNOGLOBULIN FAB 5G9 (HEAVY CHAIN) B, E214Mus musculusMutation(s): 0 
Find proteins for X5J519 (Mus musculus)
Explore X5J519 
Go to UniProtKB:  X5J519
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
TISSUE FACTOR C, F219Homo sapiensMutation(s): 0 
Gene Names: HUMAN TISSUE FACTOR EXTRACELLU, F3
Find proteins for P13726 (Homo sapiens)
Explore P13726 
Go to UniProtKB:  P13726
NIH Common Fund Data Resources
PHAROS:  P13726
GTEx:  ENSG00000117525
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 
  • Space Group: P 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 142.304α = 90
b = 73.312β = 90.89
c = 115.826γ = 90
Software Package:
Software NamePurpose
XENGENdata collection
XENGENdata reduction
TFFCmodel building
X-PLORmodel building
X-PLORrefinement
XENGENdata scaling
TFFCphasing
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-02-25
    Type: Initial release
  • Version 1.1: 2008-03-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance