3ELA

Crystal structure of active site inhibited coagulation factor VIIA mutant in complex with soluble tissue factor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.233 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Mechanism of the Ca2+-induced enhancement of the intrinsic factor VIIa activity

Bjelke, J.R.Olsen, O.H.Fodje, M.Svensson, L.A.Bang, S.Bolt, G.Kragelund, B.B.Persson, E.

(2008) J.Biol.Chem. 283: 25863-25870

  • DOI: 10.1074/jbc.M800841200

  • PubMed Abstract: 
  • The intrinsic activity of coagulation factor VIIa (FVIIa) is dependent on Ca(2+) binding to a loop (residues 210-220) in the protease domain. Structural analysis revealed that Ca(2+) may enhance the activity by attenuating electrostatic repulsion of ...

    The intrinsic activity of coagulation factor VIIa (FVIIa) is dependent on Ca(2+) binding to a loop (residues 210-220) in the protease domain. Structural analysis revealed that Ca(2+) may enhance the activity by attenuating electrostatic repulsion of Glu(296) and/or by facilitating interactions between the loop and Lys(161) in the N-terminal tail. In support of the first mechanism, the mutations E296V and D212N resulted in similar, about 2-fold, enhancements of the amidolytic activity. Moreover, mutation of the Lys(161)-interactive residue Asp(217) or Asp(219) to Ala reduced the amidolytic activity by 40-50%, whereas the K161A mutation resulted in 80% reduction. Hence one of these Asp residues in the Ca(2+)-binding loop appears to suffice for some residual interaction with Lys(161), whereas the more severe effect upon replacement of Lys(161) is due to abrogation of the interaction with the N-terminal tail. However, Ca(2+) attenuation of the repulsion between Asp(212) and Glu(296) keeps the activity above that of apoFVIIa. Altogether, our data suggest that repulsion involving Asp(212) in the Ca(2+)-binding loop suppresses FVIIa activity and that optimal activity requires a favorable interaction between the Ca(2+)-binding loop and the N-terminal tail. Crystal structures of tissue factor-bound FVIIa(D212N) and FVIIa(V158D/E296V/M298Q) revealed altered hydrogen bond networks, resembling those in factor Xa and thrombin, after introduction of the D212N and E296V mutations plausibly responsible for tethering the N-terminal tail to the activation domain. The charge repulsion between the Ca(2+)-binding loop and the activation domain appeared to be either relieved by charge removal and new hydrogen bonds (D212N) or abolished (E296V). We propose that Ca(2+) stimulates the intrinsic FVIIa activity by a combination of charge neutralization and loop stabilization.


    Organizational Affiliation

    Department of Protein Structure and Biophysics, Novo Nordisk A/S, Novo Nordisk Park, DK-2760 Måløv, Denmark.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Coagulation factor VIIA light chain
L
152Homo sapiensGene Names: F7
EC: 3.4.21.21
Find proteins for P08709 (Homo sapiens)
Go to Gene View: F7
Go to UniProtKB:  P08709
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Coagulation factor VIIA heavy chain
H
254Homo sapiensMutations: V144E, D6V, Q146M
Gene Names: F7
EC: 3.4.21.21
Find proteins for P08709 (Homo sapiens)
Go to Gene View: F7
Go to UniProtKB:  P08709
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Tissue factor
T
209Homo sapiensGene Names: F3
Find proteins for P13726 (Homo sapiens)
Go to Gene View: F3
Go to UniProtKB:  P13726
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
0Z6
Query on 0Z6

Download SDF File 
Download CCD File 
H
D-phenylalanyl-N-[(2S,3S)-6-{[amino(iminio)methyl]amino}-1-chloro-2-hydroxyhexan-3-yl]-L-phenylalaninamide
FFRCK
C25 H36 Cl N6 O3
ZKHBINZTIMXMQW-CLAROIROSA-O
 Ligand Interaction
CA
Query on CA

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Download CCD File 
H
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
FUC
Query on FUC

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Download CCD File 
L
ALPHA-L-FUCOSE
C6 H12 O5
SHZGCJCMOBCMKK-SXUWKVJYSA-N
 Ligand Interaction
GLC
Query on GLC

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Download CCD File 
L
ALPHA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
 Ligand Interaction
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000369 (0Z6)
Query on PRD_000369
HD-Phe-Phe-Arg ChloromethylketonePeptide-like / Inhibitor

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.233 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 78.361α = 90.00
b = 68.558β = 90.22
c = 78.817γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
XDSdata scaling
MAR345data collection
CCP4model building
REFMACrefinement
XDSdata reduction
CCP4phasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-11-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.2: 2013-02-27
    Type: Other
  • Version 1.3: 2017-10-25
    Type: Data collection, Refinement description