1I51

CRYSTAL STRUCTURE OF CASPASE-7 COMPLEXED WITH XIAP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.235 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis of caspase-7 inhibition by XIAP.

Chai, J.Shiozaki, E.Srinivasula, S.M.Wu, Q.Datta, P.Alnemri, E.S.Shi, Y.Dataa, P.

(2001) Cell 104: 769-780

  • DOI: 10.1016/s0092-8674(01)00272-0
  • Primary Citation of Related Structures:  
    1I51

  • PubMed Abstract: 
  • The inhibitor of apoptosis (IAP) proteins suppress cell death by inhibiting the catalytic activity of caspases. Here we present the crystal structure of caspase-7 in complex with a potent inhibitory fragment from XIAP at 2.45 A resolution. An 18-residue XIAP peptide binds the catalytic groove of caspase-7, making extensive contacts to the residues that are essential for its catalytic activity ...

    The inhibitor of apoptosis (IAP) proteins suppress cell death by inhibiting the catalytic activity of caspases. Here we present the crystal structure of caspase-7 in complex with a potent inhibitory fragment from XIAP at 2.45 A resolution. An 18-residue XIAP peptide binds the catalytic groove of caspase-7, making extensive contacts to the residues that are essential for its catalytic activity. Strikingly, despite a reversal of relative orientation, a subset of interactions between caspase-7 and XIAP closely resemble those between caspase-7 and its tetrapeptide inhibitor DEVD-CHO. Our biochemical and structural analyses reveal that the BIR domains are dispensable for the inhibition of caspase-3 and -7. This study provides a structural basis for the design of the next-generation caspase inhibitors.


    Organizational Affiliation

    Department of Molecular Biology, Princeton University, Lewis Thomas Laboratory, Washington Road, Princeton, NJ 08544, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CASPASE-7 SUBUNIT P20A, C148Homo sapiensMutation(s): 1 
Gene Names: CASP7MCH3
EC: 3.4.22 (PDB Primary Data), 3.4.22.60 (UniProt)
Find proteins for P55210 (Homo sapiens)
Explore P55210 
Go to UniProtKB:  P55210
NIH Common Fund Data Resources
PHAROS:  P55210
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CASPASE-7 SUBUNIT P11B, D105Homo sapiensMutation(s): 0 
Gene Names: CASP7MCH3
EC: 3.4.22 (PDB Primary Data), 3.4.22.60 (UniProt)
Find proteins for P55210 (Homo sapiens)
Explore P55210 
Go to UniProtKB:  P55210
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PHAROS:  P55210
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
X-LINKED INHIBITOR OF APOPTOSIS PROTEINE, F117Homo sapiensMutation(s): 0 
Gene Names: XIAPAPI3BIRC4IAP3
EC: 2.3.2.27
Find proteins for P98170 (Homo sapiens)
Explore P98170 
Go to UniProtKB:  P98170
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PHAROS:  P98170
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.235 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 89.6α = 90
b = 89.6β = 90
c = 185.5γ = 120
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2001-02-23 
  • Released Date: 2002-02-23 
  • Deposition Author(s): Chai, J., Shi, Y.

Revision History  (Full details and data files)

  • Version 1.0: 2002-02-23
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance