2C8W

thrombin inhibitors

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.96 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.167 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Application of Fragment Screening and Fragment Linking to the Discovery of Novel Thrombin Inhibitors

Howard, N., Abell, C., Blakemore, W., Chessari, G., Congreve, M., Howard, S., Jhoti, H., Murray, C.W., Seavers, L.C.A., Van Montfort, R.L.M.

(2006) J Med Chem 49: 1346

  • DOI: 10.1021/jm050850v
  • Structures With Same Primary Citation

  • PubMed Abstract: 

    • The screening of fragments is an alternative approach to high-throughput screening for the identification of leads for therapeutic targets. Fragment hits have been discovered using X-ray crystallographic screening of protein crystals of the serine pr ...

    The screening of fragments is an alternative approach to high-throughput screening for the identification of leads for therapeutic targets. Fragment hits have been discovered using X-ray crystallographic screening of protein crystals of the serine protease enzyme thrombin. The fragment library was designed to avoid any well-precedented, strongly basic functionality. Screening hits included a novel ligand (3), which binds exclusively to the S2-S4 pocket, in addition to smaller fragments which bind to the S1 pocket. The structure of these protein-ligand complexes are presented. A chemistry strategy to link two such fragments together and to synthesize larger drug-sized compounds resulted in the efficient identification of hybrid inhibitors with nanomolar potency (e.g., 7, IC50 = 3.7 nM). These potent ligands occupy the same area of the active site as previously described peptidic inhibitors, while having very different chemical architecture.

    Organizational Affiliation: 

    Astex Therapeutics, 436 Cambridge Science Park, Milton Road, Cambridge CB4 0QA, United Kingdom.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
THROMBIN LIGHT CHAIN
A
36Homo sapiensMutation(s): 0 
Gene Names: F2
EC: 3.4.21.5
Find proteins for P00734 (Homo sapiens)
Go to UniProtKB:  P00734
NIH Common Fund Data Resources
PHAROS  P00734
GTEx  ENSG00000180210
Protein Feature View
  • Reference Sequence
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
HIRUDIN VARIANT-2
I
12Hirudo medicinalisMutation(s): 0 
Find proteins for P09945 (Hirudo medicinalis)
Go to UniProtKB:  P09945
Protein Feature View
  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
THROMBIN HEAVY CHAIN
B
259Homo sapiensMutation(s): 0 
Gene Names: F2
EC: 3.4.21.5
Find proteins for P00734 (Homo sapiens)
Go to UniProtKB:  P00734
NIH Common Fund Data Resources
PHAROS  P00734
GTEx  ENSG00000180210
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
C7M
Query on C7M
Download CCD File 
B
(2S,3R)-N-[5-CHLORO-2-(2,3-DIHYDRO-1H-TETRAZOL-1-YL)BENZYL]-3-HYDROXY-4-{[(4-METHOXYPHENYL)SULFONYL]AMINO}-1-PHENYLBUTA N-2-AMINIUM
C25 H30 Cl N6 O4 S
LMFQPEFBZUDVPR-UKILVPOCSA-O		 Ligand Interaction
NA
Query on NA
Download CCD File 
B
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TYS
Query on TYS		IL-PEPTIDE LINKINGC9 H11 N O6 STYR
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
C7MIC50 :  3.700000047683716   nM  PDBBind
C7MIC50:  3.5   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.96 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.167 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.579α = 90
b = 71.906β = 100.42
c = 72.2γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
d*TREKdata reduction
d*TREKdata scaling
IN-HOUSEphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-07-04
    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: 2013-08-07
    Changes: Derived calculations, Other
  • Version 1.3: 2017-06-28
    Changes: Data collection