1QHR

NOVEL COVALENT ACTIVE SITE THROMBIN INHIBITORS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.204 
  • R-Value Observed: 0.204 

wwPDB Validation   3D Report Full Report


This is version 1.6 of the entry. See complete history


Literature

Crystal structures of thrombin complexed to a novel series of synthetic inhibitors containing a 5,5-trans-lactone template.

Jhoti, H.Cleasby, A.Reid, S.Thomas, P.J.Weir, M.Wonacott, A.

(1999) Biochemistry 38: 7969-7977

  • DOI: https://doi.org/10.1021/bi9830359
  • Primary Citation of Related Structures:  
    1QHR, 1QJ1, 1QJ6, 1QJ7

  • PubMed Abstract: 

    The binding modes of four active site-directed, acylating inhibitors of human alpha-thrombin have been determined using X-ray crystallography. These inhibitors (GR157368, GR166081, GR167088, and GR179849) are representatives of a series utilizing a novel 5, 5-trans-lactone template to specifically acylate Ser195 of thrombin, resulting in an acyl complex. In each case the crystal structure of the complex reveals a binding mode which is consistent with the formation of a covalent bond between the ring-opened lactone of the inhibitor and residue Ser195. Improvements in potency and selectivity of these inhibitors for thrombin are rationalized on the basis of the observed protein/inhibitor interactions identified in these complexes. Occupation of the thrombin S2 and S3 pockets is shown to be directly correlated with improved binding and a degree of selectivity. The binding mode of GR179849 to thrombin is compared with the thrombin/PPACK complex [Bode, W., Turk, D., and Karshikov, A. (1992) Protein Sci. 1, 426-471] as this represents the archetypal binding mode for a thrombin inhibitor. This series of crystal structures is the first to be reported of synthetic, nonpeptidic acylating inhibitors bound to thrombin and provides details of the molecular recognition features that resulted in nanomolar potency.


  • Organizational Affiliation

    Biomolecular Structure Unit, Glaxo Wellcome Medicines Research Centre, Hertfordshire, U.K.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ALPHA THROMBIN36Homo sapiensMutation(s): 0 
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
GTEx:  ENSG00000180210 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00734
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
ALPHA THROMBIN259Homo sapiensMutation(s): 0 
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
GTEx:  ENSG00000180210 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00734
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
HIRUGENC [auth I]10Hirudo medicinalisMutation(s): 0 
UniProt
Find proteins for P01050 (Hirudo medicinalis)
Explore P01050 
Go to UniProtKB:  P01050
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01050
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
157
Query on 157

Download Ideal Coordinates CCD File 
D [auth B]6-(2-HYDROXY-CYCLOPENTYL)-7-OXO-HEPTANAMIDINE
C12 H22 N2 O2
FCDJKFJACUMSOZ-AXFHLTTASA-N
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
TYS
Query on TYS
C [auth I]L-PEPTIDE LINKINGC9 H11 N O6 STYR
Binding Affinity Annotations 
IDSourceBinding Affinity
157 PDBBind:  1QHR IC50: 130 (nM) from 1 assay(s)
BindingDB:  1QHR IC50: 130 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.204 
  • R-Value Observed: 0.204 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.7α = 90
b = 72β = 101
c = 73γ = 90
Software Package:
Software NamePurpose
MADNESSdata collection
CCP4data reduction
X-PLORmodel building
Quantamodel building
X-PLORrefinement
MADNESSdata reduction
CCP4data scaling
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-05-31
    Type: Initial release
  • Version 1.1: 2007-10-16
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.3: 2017-10-04
    Changes: Refinement description
  • Version 1.4: 2018-04-04
    Changes: Data collection
  • Version 1.5: 2023-12-27
    Changes: Data collection, Database references, Derived calculations
  • Version 1.6: 2024-10-30
    Changes: Structure summary