4LSZ

Caspase-7 in Complex with DARPin D7.18


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.26 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.176 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Combined inhibition of caspase 3 and caspase 7 by two highly selective DARPins slows down cellular demise.

Flutsch, A.Ackermann, R.Schroeder, T.Lukarska, M.Hausammann, G.J.Weinert, C.Briand, C.Grutter, M.G.

(2014) Biochem J 461: 279-290

  • DOI: 10.1042/BJ20131456
  • Primary Citation of Related Structures:  
    4LSZ

  • PubMed Abstract: 
  • Caspases play important roles during apoptosis, inflammation and proliferation. The high homology among family members makes selective targeting of individual caspases difficult, which is necessary to precisely define the role of these enzymes. We have s ...

    Caspases play important roles during apoptosis, inflammation and proliferation. The high homology among family members makes selective targeting of individual caspases difficult, which is necessary to precisely define the role of these enzymes. We have selected caspase-7-specific binders from a library of DARPins (designed ankyrin repeat proteins). The DARPins D7.18 and D7.43 bind specifically to procaspase 7 and active caspase 7, but not to other members of the family. Binding of the DARPins does not affect the active enzyme, but interferes with its activation by other caspases. The crystal structure of the caspase 7-D7.18 complex elucidates the high selectivity and the mode of inhibition. Combining these caspase-7-specific DARPins with the previously reported caspase-3-inhibitory DARPin D3.4S76R reduces the activity of caspase 3 and 7 in double-transfected HeLa cells during apoptosis. In addition, these cells showed less susceptibility to TRAIL (tumour-necrosis-factor-related apoptosis-inducing ligand)-induced apoptosis in living cell experiments. D7.18 and D7.43 are therefore novel tools for in vitro studies on procaspase 7 activation as well as for clarifying the role of its activation in different cellular processes. If applied in combination with D3.4S76R, they represent an excellent instrument to increase our understanding of these enzymes during various cellular processes.


    Organizational Affiliation

    *Department of Biochemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Caspase-7 subunit p20 AC175Homo sapiensMutation(s): 0 
Gene Names: CASP7MCH3
EC: 3.4.22.60
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
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Caspase-7 subunit p10 BD105Homo sapiensMutation(s): 0 
Gene Names: CASP7MCH3
EC: 3.4.22.60
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
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
DARPin D7.18 EF169synthetic constructMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.26 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.176 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.84α = 90
b = 82.31β = 91.86
c = 95.08γ = 90
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-02
    Type: Initial release
  • Version 1.1: 2014-07-09
    Changes: Database references
  • Version 1.2: 2017-11-15
    Changes: Refinement description