1H8I

X-ray crystal structure of human alpha-thrombin with a tripeptide phosphonate inhibitor.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.186 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Inhibition of Human Alpha-Thrombin by a Phosphonate Tripeptide Proceeds Via a Metastable Pentacoordinated Phosphorus Intermediate

Skordalakes, E.Dodson, G.G.Green, D.S.Goodwin, C.A.Scully, M.F.Hudson, H.R.Kakkar, V.V.Deadman, J.J.

(2001) J Mol Biol 311: 549

  • DOI: 10.1006/jmbi.2001.4872
  • Primary Citation of Related Structures:  
    1H8D, 1H8I

  • PubMed Abstract: 
  • X-ray crystallographic studies of human alpha-thrombin with a novel synthetic inhibitor, an acyl (alpha-aminoalkyl)phosphonate, reveal the existence of a pentacovalent phosphorus intermediate state. Crystal structures of the complex of alpha-thrombin wit ...

    X-ray crystallographic studies of human alpha-thrombin with a novel synthetic inhibitor, an acyl (alpha-aminoalkyl)phosphonate, reveal the existence of a pentacovalent phosphorus intermediate state. Crystal structures of the complex of alpha-thrombin with the phosphonate compound were determined independently using crystals of different ages. The first structure, solved from a crystal less than seven days old, showed a pentacoordinated phosphorus moiety. The second structure, determined from a crystal that was 12 weeks old, showed a tetracoordinated phosphorus moiety. In the first structure, a water molecule, made nucleophilic by coordination to His57 of alpha-thrombin, is bonded to the pentacoordinated phosphorus atom. Its position is approximately equivalent to that occupied by the water molecule responsible for hydrolytic deacylation during normal hydrolysis. The pentacoordinated phosphorus adduct collapses to give the expected pseudo tetrahedral complex, where the phosphorus atom is covalently bonded to Ser195 O(gamma). The crystallographic data presented here therefore suggest that the covalent bond formed between the inhibitor's phosphorus atom and O(gamma) of Ser195 proceeds via an addition-elimination mechanism, which involves the formation of a pentacoordinate intermediate.


    Related Citations: 
    • Inhibition of Trypsin and Thrombin by Amino (4-Amidinophenyl)Methanephosphonate Diphenyl Ester Derivatives: X-Ray and Molecular Models
      Bertrand, J.A., Oleksyszyn, J., Kam, C.M., Boduszek, B., Presnell, S., Plaskon, R.R., Suddath, F.L., Powers, J.C., Williams, L.D.
      (1996) Biochemistry 35: 3147

    Organizational Affiliation

    Chemistry Department and Biochemistry Department, Thrombosis Research Institute, Emmanuel Kaye Building, London, SW3 6LR, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
THROMBIN H253Homo 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
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HIRUDIN I I10Hirudo medicinalisMutation(s): 0 
Find proteins for P01050 (Hirudo medicinalis)
Explore P01050 
Go to UniProtKB:  P01050
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
THROMBIN L27Homo 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
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PHV
Query on PHV

Download Ideal Coordinates CCD File 
H
N-[(benzyloxy)carbonyl]-beta-phenyl-D-phenylalanyl-N-[(1S)-4-methoxy-1-phosphonobutyl]-L-prolinamide
C33 H40 N3 O8 P
RQOYKJRZXWFGEE-TWLDFKIOSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TYS
Query on TYS
IL-PEPTIDE LINKINGC9 H11 N O6 STYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.186 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.393α = 90
b = 71.301β = 100.87
c = 72.416γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-03-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.2: 2012-11-30
    Changes: Other
  • Version 1.3: 2013-03-13
    Changes: Other
  • Version 1.4: 2017-07-12
    Changes: Derived calculations
  • Version 1.5: 2019-05-22
    Changes: Data collection, Refinement description