3R3G

Structure of human thrombin with residues 145-150 of murine thrombin.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Rigidification of the autolysis loop enhances Na(+) binding to thrombin.

Pozzi, N.Chen, R.Chen, Z.Bah, A.Di Cera, E.

(2011) Biophys Chem 159: 6-13

  • DOI: 10.1016/j.bpc.2011.04.003
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Binding of Na(+) to thrombin ensures high activity toward physiological substrates and optimizes the procoagulant and prothrombotic roles of the enzyme in vivo. Under physiological conditions of pH and temperature, the binding affinity of Na(+) is we ...

    Binding of Na(+) to thrombin ensures high activity toward physiological substrates and optimizes the procoagulant and prothrombotic roles of the enzyme in vivo. Under physiological conditions of pH and temperature, the binding affinity of Na(+) is weak due to large heat capacity and enthalpy changes associated with binding, and the K(d)=80 mM ensures only 64% saturation of the site at the concentration of Na(+) in the blood (140 mM). Residues controlling Na(+) binding and activation have been identified. Yet, attempts to improve the interaction of Na(+) with thrombin and possibly increase catalytic activity under physiological conditions have so far been unsuccessful. Here we report how replacement of the flexible autolysis loop of human thrombin with the homologous rigid domain of the murine enzyme results in a drastic (up to 10-fold) increase in Na(+) affinity and a significant improvement in the catalytic activity of the enzyme. Rigidification of the autolysis loop abolishes the heat capacity change associated with Na(+) binding observed in the wild-type and also increases the stability of thrombin. These findings have general relevance to protein engineering studies of clotting proteases and trypsin-like enzymes.


    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 Biology, Saint Louis University School of Medicine, St. Louis, MO 63104, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thrombin Light ChainA31Homo sapiensMutation(s): 0 
Gene Names: F2
EC: 3.4.21.5
Find proteins for P00734 (Homo sapiens)
Explore P00734 
Go to UniProtKB:  P00734
NIH Common Fund Data Resources
PHAROS  P00734
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Thrombin Heavy ChainB259Homo sapiensMutation(s): 6 
Gene Names: F2
EC: 3.4.21.5
Find proteins for P00734 (Homo sapiens)
Explore P00734 
Go to UniProtKB:  P00734
NIH Common Fund Data Resources
PHAROS  P00734
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download CCD File 
B
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
NA
Query on NA

Download CCD File 
B
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.186 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.072α = 90
b = 48.058β = 92.08
c = 53.722γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-05-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-09-21
    Changes: Database references
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Data collection, Database references, Derived calculations, Structure summary