1RWW

Crystal structure of human caspase-1 in complex with 4-oxo-3-[(6-{[4-(quinoxalin-2-ylamino)-benzoylamino]-methyl}-pyridine-3-carbonyl)-amino]-butyric acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Tethering identifies fragment that yields potent inhibitors of human caspase-1.

Fahr, B.T.O'Brien, T.Pham, P.Waal, N.D.Baskaran, S.Raimundo, B.C.Lam, J.W.Sopko, M.M.Purkey, H.E.Romanowski, M.J.

(2006) Bioorg Med Chem Lett 16: 559-562

  • DOI: 10.1016/j.bmcl.2005.10.048
  • Primary Citation of Related Structures:  
    1RWX, 1RWW

  • PubMed Abstract: 
  • Disulfide Tethering was applied to the active site of human caspase-1, resulting in the discovery of a novel, tricyclic molecular fragment that selectively binds in S4. This fragment was developed into a class of potent inhibitors of human caspase-1. ...

    Disulfide Tethering was applied to the active site of human caspase-1, resulting in the discovery of a novel, tricyclic molecular fragment that selectively binds in S4. This fragment was developed into a class of potent inhibitors of human caspase-1. Several key analogues determined the optimal distance of the tricycle from the catalytic residues, the relative importance of various features of the tricycle, and the importance of the linker.


    Organizational Affiliation

    Department of Chemistry, Sunesis Pharmaceuticals, 341 Oyster Point Boulevard, South San Francisco, CA 94080, USA. bfahr@sunesis.com



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Interleukin-1 beta convertaseA178Homo sapiensMutation(s): 0 
Gene Names: CASP1IL1BCIL1BCE
EC: 3.4.22.36
Find proteins for P29466 (Homo sapiens)
Explore P29466 
Go to UniProtKB:  P29466
NIH Common Fund Data Resources
PHAROS  P29466
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Interleukin-1 beta convertaseB88Homo sapiensMutation(s): 0 
Gene Names: CASP1IL1BCIL1BCE
EC: 3.4.22.36
Find proteins for P29466 (Homo sapiens)
Explore P29466 
Go to UniProtKB:  P29466
NIH Common Fund Data Resources
PHAROS  P29466
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OQB
Query on OQB

Download CCD File 
A
4-OXO-3-[(6-{[4-(QUINOXALIN-2-YLAMINO)-BENZOYLAMINO]-METHYL}-PYRIDINE-3-CARBONYL)-AMINO]-BUTYRIC ACID
C26 H22 N6 O5
GOTFAMYWTAZALY-FQEVSTJZSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
OQBIC50:  5   nM  BindingDB
OQBKi :  5   nM  PDBBind
OQBKi:  5   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.962α = 90
b = 62.962β = 90
c = 161.401γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
d*TREKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-12-28
    Type: Initial release
  • Version 1.1: 2007-10-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance