1H8D

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.170 

wwPDB Validation 3D Report Full Report


This is version 1.4 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:  

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
THROMBIN
H
260Homo 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
HIRUDIN I
I
10Hirudo medicinalisMutation(s): 0 
Find proteins for P01050 (Hirudo medicinalis)
Go to UniProtKB:  P01050
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
THROMBIN
L
29Homo 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 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PHW
Query on PHW

Download SDF File 
Download CCD File 
H
N-[(benzyloxy)carbonyl]-beta-phenyl-D-phenylalanyl-N-{(1S,3E)-1-[dihydroxy(diphenoxy)-lambda~5~-phosphanyl]-4-methoxybut-3-en-1-yl}-L-prolinamide
C45 H48 N3 O9 P
RYHYSOICLVLDDN-JBHUJMBHSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TYS
Query on TYS
I
L-PEPTIDE LINKINGC9 H11 N O6 STYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.170 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 70.640α = 90.00
b = 71.600β = 100.35
c = 71.900γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
REFMACrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-02-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.2: 2012-11-30
    Type: Other
  • Version 1.3: 2013-03-13
    Type: Other
  • Version 1.4: 2017-07-12
    Type: Advisory, Derived calculations