2OCV

Structural basis of Na+ activation mimicry in murine thrombin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis of na+ activation mimicry in murine thrombin.

Marino, F.Chen, Z.W.Ergenekan, C.E.Bush-Pelc, L.A.Mathews, F.S.Di Cera, E.

(2007) J Biol Chem 282: 16355-16361

  • DOI: 10.1074/jbc.M701323200
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Unlike human thrombin, murine thrombin lacks Na+ activation due to the charge reversal substitution D222K in the Na+ binding loop. However, the enzyme is functionally stabilized in a Na+-bound form and is highly active toward physiologic substrates. ...

    Unlike human thrombin, murine thrombin lacks Na+ activation due to the charge reversal substitution D222K in the Na+ binding loop. However, the enzyme is functionally stabilized in a Na+-bound form and is highly active toward physiologic substrates. The structural basis of this peculiar property is unknown. Here, we present the 2.2 A resolution x-ray crystal structure of murine thrombin in the absence of inhibitors and salts. The enzyme assumes an active conformation, with Ser-195, Glu-192, and Asp-189 oriented as in the Na+-bound fast form of human thrombin. Lys-222 completely occludes the pore of entry to the Na+ binding site and positions its side chain inside the pore, with the Nzeta atom H-bonded to the backbone oxygen atoms of Lys-185, Asp-186b, and Lys-186d. The same architecture is observed in the 1.75 A resolution structure of a thrombin chimera in which the human enzyme carries all residues defining the Na+ pore in the murine enzyme. These findings demonstrate that Na+ activation in thrombin is linked to the architecture of the Na+ pore. The molecular strategy of Na+ activation mimicry unraveled for murine thrombin is relevant to serine proteases and enzymes activated by monovalent cations in general.


    Related Citations: 
    • Molecular dissection of NA+ binding to thrombin
      Pineda, A.O., Carrell, C.J., Bush, L.A., Prasad, S., Caccia, S., Chen, Z.W., Mathews, F.S., Di Cera, E.
      (2004) J Biol Chem 279: 31842

    Organizational Affiliation

    Department of Biochemistry and Molecular Biophysics, Washington University Medical School, St. Louis, Missouri 63110, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thrombin
A
42Mus musculusMutation(s): 0 
Gene Names: F2Cf2
EC: 3.4.21.5
Find proteins for P19221 (Mus musculus)
Go to UniProtKB:  P19221
NIH Common Fund Data Resources
IMPC  MGI:88380

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Thrombin
B
259Mus musculusMutation(s): 0 
Gene Names: F2Cf2
EC: 3.4.21.5
Find proteins for P19221 (Mus musculus)
Go to UniProtKB:  P19221
NIH Common Fund Data Resources
IMPC  MGI:88380
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.186 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 136.77α = 90
b = 47.51β = 95.54
c = 43.18γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling
CCP4phasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-04-10
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance