1RIW

Thrombin in complex with natural product inhibitor Oscillarin

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.04 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.213 

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This is version 1.5 of the entry. See complete history. 


Literature

The N-acyloxyiminium ion aza-Prins route to octahydroindoles: total synthesis and structural confirmation of the antithrombotic marine natural product oscillarin

Hanessian, S., Tremblay, M., Petersen, J.F.W.

(2004) J Am Chem Soc 126: 6064-6071

  • DOI: 10.1021/ja030669g
  • Primary Citation of Related Structures:  
    1RIW

  • PubMed Abstract: 

    • The first enantiocontrolled total synthesis of the marine natural product oscillarin is described. The proposed structure and absolute configuration of oscillarin is thus confirmed, and a previously assigned structure of a subunit was shown to be incorrect ...

    The first enantiocontrolled total synthesis of the marine natural product oscillarin is described. The proposed structure and absolute configuration of oscillarin is thus confirmed, and a previously assigned structure of a subunit was shown to be incorrect. The X-ray structure of an oscillarin-thrombin complex was resolved at 2.0 A resolution, which validated its potent inhibitory activity against the enzyme with an IC(50) = 28 nM. Methodology was developed for the synthesis of enantiopure octahydroindole-2-carboxylic acids with usable functionality at C-6. The method consists of the halocarbocyclization of N-acyloxyiminium ions containing an olefinic tether in the presence of tin tetrachloride or tin tetrabromide. This N-acyloxyiminium ion aza-Prins carbocyclization proved to be general for the construction of octahydroindole and perhydroquinoline 2-carboxylic acids. Mechanistic rationales are based on an antiperiplanar attack of the terminal alkene on the iminium ion, leading to an incipient secondary carbocation which is trapped by halide via an equatorial attack. X-ray crystal structures of products corroborate the expected stereochemistry.

    Organizational Affiliation: 

    Department of Chemistry, Université de Montréal, C.P. 6128, Station Centre-ville, Montréal, P.Q., H3C 3J7 Canada. stephen.hanessian@umontreal.ca



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
thrombin light chainA36Homo 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
GTEx:  ENSG00000180210
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
thrombin heavy chain, BB147Homo 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
GTEx:  ENSG00000180210
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
thrombin heavy chain, CC105Homo 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
GTEx:  ENSG00000180210
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Hirudin IIBD11Hirudo medicinalisMutation(s): 0 
Find proteins for P28504 (Hirudo medicinalis)
Explore P28504 
Go to UniProtKB:  P28504
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OSC
Query on OSC
Download Ideal Coordinates CCD File 
 H [auth C](2R,3AS,6R,7AS)-N-(2-{1-[AMINO(IMINO)METHYL]-2,5-DIHYDRO-1H-PYRROL-3-YL}ETHYL)-6-HYDROXY-1-{N-[(2S)-2-HYDROXY-3-PHENYLPROPANOYL]PHENYLALANYL}OCTAHYDRO-1H-INDOLE-2-CARBOXAMIDE
C34 H44 N6 O5
YNAKQOCSOOKXJP-VCNFNBSBSA-N		 Ligand Interaction
NAG
Query on NAG
Download Ideal Coordinates CCD File 
 E [auth B]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N		 Ligand Interaction
NA
Query on NA
Download Ideal Coordinates CCD File 
 F [auth C], G [auth C]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TYS
Query on TYS		DL-PEPTIDE LINKINGC9 H11 N O6 STYR
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
OSCIC50:  28   nM  BindingDB
OSCIC50:  28   nM  Binding MOAD
OSCIC50 :  28   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.04 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.213 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.055α = 90
b = 72.366β = 100.19
c = 70.83γ = 90
Software Package:
Software NamePurpose
CNXrefinement
MOSFLMdata reduction
CCP4data scaling
CNXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-11-09
    Type: Initial release
  • Version 1.1: 2008-04-29
    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: 2012-12-12
    Changes: Other
  • Version 1.4: 2013-03-13
    Changes: Other
  • Version 1.5: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary