3E6P

Crystal structure of human meizothrombin desF1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.213 

wwPDB Validation   3D Report Full Report


This is version 2.0 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
  • Primary Citation of Related Structures:  
    3E6P

  • 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 we present the first X-ray crystal structure of human meizothrombin desF1 solved in the presence of the active site inhibitor PPACK at 2 ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ProthrombinA [auth L]158Homo sapiensMutation(s): 0 
Gene Names: F2
EC: 3.4.21.5
UniProt & NIH Common Fund Data Resources
Find proteins for P00734 (Homo sapiens)
Explore P00734 
Go to UniProtKB:  P00734
PHAROS:  P00734
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ProthrombinB [auth H]259Homo sapiensMutation(s): 0 
Gene Names: F2
EC: 3.4.21.5
UniProt & NIH Common Fund Data Resources
Find proteins for P00734 (Homo sapiens)
Explore P00734 
Go to UniProtKB:  P00734
PHAROS:  P00734
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseC [auth A]2 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DFK
Query on DFK

Download Ideal Coordinates CCD File 
E [auth H]D-PHENYLALANYL-N-[(1S)-4-{[(Z)-AMINO(IMINO)METHYL]AMINO}-1-(CHLOROACETYL)BUTYL]-L-PROLINAMIDE
C21 H34 N6 O3
YKABSBOIBVOPTK-LVQSNCFTSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
D [auth L]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
NA
Query on NA

Download Ideal Coordinates CCD File 
F [auth H]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.213 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 121.336α = 90
b = 121.336β = 90
c = 100.204γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data collection
HKL-2000data reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-11-18
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary