3E6P

Crystal structure of human meizothrombin desF1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Na(+) binding to meizothrombin desF1.

Papaconstantinou, M.E.Gandhi, P.S.Chen, Z.Bah, A.Di Cera, E.

(2008) Cell.Mol.Life Sci. 65: 3688-3697

  • DOI: 10.1007/s00018-008-8502-7
  • Also Cited By: 3NXP

  • PubMed Abstract: 
  • Meizothrombin is the physiologically active intermediate generated by a single cleavage of prothrombin at R320 to separate the A and B chains. Recent evidence has suggested that meizothrombin, like thrombin, is a Na(+)-activated enzyme. In this study ...

    Meizothrombin is the physiologically active intermediate generated by a single cleavage of prothrombin at R320 to separate the A and B chains. Recent evidence has suggested that meizothrombin, like thrombin, is a Na(+)-activated enzyme. In this study we present the first X-ray crystal structure of human meizothrombin desF1 solved in the presence of the active site inhibitor PPACK at 2.1 A resolution. The structure reveals a Na(+) binding site whose architecture is practically identical to that of human thrombin. Stopped-flow measurements of Na(+) binding to meizothrombin desF1 document a slow phase of fluorescence change with a k(obs) decreasing hyperbolically with increasing [Na(+)], consistent with the existence of three conformations in equilibrium, E*, E and E:Na(+), as for human thrombin. Evidence that meizothrombin exists in multiple conformations provides valuable new information for studies of the mechanism of prothrombin activation.


    Related Citations: 
    • New insights into the regulation of the blood clotting cascade derived from the X-ray crystal structure of bovine meizothrombin des F1 in complex with PPACK.
      Martin, P.D.,Malkowski, M.G.,Box, J.,Esmon, C.T.,Edwards, B.F.
      (1997) Structure 5: 1681


    Organizational Affiliation

    Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO 63110, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Prothrombin
L
158Homo sapiensMutation(s): 0 
Gene Names: F2
EC: 3.4.21.5
Find proteins for P00734 (Homo sapiens)
Go to Gene View: F2
Go to UniProtKB:  P00734
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Prothrombin
H
259Homo sapiensMutation(s): 0 
Gene Names: F2
EC: 3.4.21.5
Find proteins for P00734 (Homo sapiens)
Go to Gene View: F2
Go to UniProtKB:  P00734
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
H
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

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Download CCD File 
L
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
DFK
Query on DFK

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Download CCD File 
H
D-PHENYLALANYL-N-[(1S)-4-{[(Z)-AMINO(IMINO)METHYL]AMINO}-1-(CHLOROACETYL)BUTYL]-L-PROLINAMIDE
D-PHENYLALANYL-PROLYL-ARGINYL-CHLOROMETHANE
C21 H34 N6 O3
YKABSBOIBVOPTK-LVQSNCFTSA-N
 Ligand Interaction
NAG
Query on NAG

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Download CCD File 
H
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.211 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 121.336α = 90.00
b = 121.336β = 90.00
c = 100.204γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
MOLREPphasing
REFMACrefinement
SCALEPACKdata scaling
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-11-18
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Non-polymer description, Version format compliance