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 

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


  • 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-resi ...

    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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CASPASE-7 SUBUNIT P20
A, C
148Homo sapiensGene Names: CASP7 (MCH3)
EC: 3.4.22.60
Find proteins for P55210 (Homo sapiens)
Go to Gene View: CASP7
Go to UniProtKB:  P55210
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CASPASE-7 SUBUNIT P11
B, D
105Homo sapiensGene Names: CASP7 (MCH3)
EC: 3.4.22.60
Find proteins for P55210 (Homo sapiens)
Go to Gene View: CASP7
Go to UniProtKB:  P55210
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
X-LINKED INHIBITOR OF APOPTOSIS PROTEIN
E, F
117Homo sapiensGene Names: XIAP (API3, BIRC4, IAP3)
EC: 6.3.2.-
Find proteins for P98170 (Homo sapiens)
Go to Gene View: XIAP
Go to UniProtKB:  P98170
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.233 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 89.600α = 90.00
b = 89.600β = 90.00
c = 185.500γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
CNSrefinement
AMoREphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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

Revision History 

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