2FIR

Crystal structure of DFPR-VIIa/sTF


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.207 

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This is version 1.4 of the entry. See complete history


Literature

High Resolution Structures of p-Aminobenzamidine- and Benzamidine-VIIa/Soluble Tissue Factor: Unpredicted conformation of the 192-193 peptide bond and mapping of Ca2+, Mg2+, Na+ and Zn2+ sites in factor VIIa

Bajaj, S.P.Schmidt, A.E.Agah, S.Bajaj, M.S.Padmanabhan, K.

(2006) J Biol Chem 281: 24873-24888

  • DOI: 10.1074/jbc.M509971200
  • Primary Citation of Related Structures:  
    2A2Q, 2AER, 2FIR

  • PubMed Abstract: 
  • Factor VIIa (FVIIa) consists of a gamma-carboxyglutamic acid (Gla) domain, two epidermal growth factor-like domains, and a protease domain. FVIIa binds seven Ca(2+) ions in the Gla, one in the EGF1, and one in the protease domain. However, blood contains both Ca(2+) and Mg(2+), and the Ca(2+) sites in FVIIa that could be specifically occupied by Mg(2+) are unknown ...

    Factor VIIa (FVIIa) consists of a gamma-carboxyglutamic acid (Gla) domain, two epidermal growth factor-like domains, and a protease domain. FVIIa binds seven Ca(2+) ions in the Gla, one in the EGF1, and one in the protease domain. However, blood contains both Ca(2+) and Mg(2+), and the Ca(2+) sites in FVIIa that could be specifically occupied by Mg(2+) are unknown. Furthermore, FVIIa contains a Na(+) and two Zn(2+) sites, but ligands for these cations are undefined. We obtained p-aminobenzamidine-VIIa/soluble tissue factor (sTF) crystals under conditions containing Ca(2+), Mg(2+), Na(+), and Zn(2+). The crystal diffracted to 1.8A resolution, and the final structure has an R-factor of 19.8%. In this structure, the Gla domain has four Ca(2+) and three bound Mg(2+). The EGF1 domain contains one Ca(2+) site, and the protease domain contains one Ca(2+), one Na(+), and two Zn(2+) sites. (45)Ca(2+) binding in the presence/absence of Mg(2+) to FVIIa, Gla-domainless FVIIa, and prothrombin fragment 1 supports the crystal data. Furthermore, unlike in other serine proteases, the amide N of Gly(193) in FVIIa points away from the oxyanion hole in this structure. Importantly, the oxyanion hole is also absent in the benzamidine-FVIIa/sTF structure at 1.87A resolution. However, soaking benzamidine-FVIIa/sTF crystals with d-Phe-Pro-Arg-chloromethyl ketone results in benzamidine displacement, d-Phe-Pro-Arg incorporation, and oxyanion hole formation by a flip of the 192-193 peptide bond in FVIIa. Thus, it is the substrate and not the TF binding that induces oxyanion hole formation and functional active site geometry in FVIIa. Absence of oxyanion hole is unusual and has biologic implications for FVIIa macromolecular substrate specificity and catalysis.


    Organizational Affiliation

    Protein Science Laboratory, UCLA/Orthopaedic Hospital, Department of Orthopaedic Surgery and Molecular Biology Institute, UCLA, Los Angeles, California 90095, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Coagulation factor VII Light chainA [auth L]142Homo sapiensMutation(s): 0 
Gene Names: F7
EC: 3.4.21.21
UniProt & NIH Common Fund Data Resources
Find proteins for P08709 (Homo sapiens)
Explore P08709 
Go to UniProtKB:  P08709
PHAROS:  P08709
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Coagulation factor VII Heavy Chain (EC 3.4.21.21)B [auth H]254Homo sapiensMutation(s): 0 
Gene Names: F7
EC: 3.4.21.21
UniProt & NIH Common Fund Data Resources
Find proteins for P08709 (Homo sapiens)
Explore P08709 
Go to UniProtKB:  P08709
PHAROS:  P08709
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Tissue factorC [auth T]205Homo sapiensMutation(s): 0 
Gene Names: F3
UniProt & NIH Common Fund Data Resources
Find proteins for P13726 (Homo sapiens)
Explore P13726 
Go to UniProtKB:  P13726
PHAROS:  P13726
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 8 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
0G7 (Subject of Investigation/LOI)
Query on 0G7

Download Ideal Coordinates CCD File 
N [auth H]D-phenylalanyl-N-[(3S)-6-carbamimidamido-1-chloro-2-oxohexan-3-yl]-L-prolinamide
C21 H31 Cl N6 O3
KWPACVJPAFGBEQ-IKGGRYGDSA-N
 Ligand Interaction
GLC (Subject of Investigation/LOI)
Query on GLC

Download Ideal Coordinates CCD File 
D [auth L]alpha-D-glucopyranose
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
 Ligand Interaction
FUC (Subject of Investigation/LOI)
Query on FUC

Download Ideal Coordinates CCD File 
E [auth L]alpha-L-fucopyranose
C6 H12 O5
SHZGCJCMOBCMKK-SXUWKVJYSA-N
 Ligand Interaction
ZN
Query on ZN

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Q [auth H], R [auth H]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

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G [auth L], H [auth L], J [auth L], K [auth L], M [auth L], O [auth H]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
S [auth H], T [auth H], U [auth T]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
F [auth L], I [auth L], LMAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

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P [auth H]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CGU
Query on CGU
A [auth L]L-PEPTIDE LINKINGC6 H9 N O6GLU
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 8
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000021 (0G7)
Query on PRD_000021
N [auth H]D-Phe-Pro-Arg chloromethylketone (PPACK)Peptide-like /  Inhibitor  Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.207 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.02α = 90
b = 80.98β = 90
c = 126.33γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
HKL-2000data reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-07-11
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.3: 2013-02-27
    Changes: Other
  • Version 1.4: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary