Macromolecule Content

• Total Structure Weight: 30345.42 
• Atom Count: 1827 
• Residue Count: 266 
• Unique protein chains: 1

2K7Z

Solution Structure of the Catalytic Domain of Procaspase-8

• DOI: 10.2210/pdb2K7Z/pdb
• BMRB: 15932

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): 1 


• Deposited: 2008-08-28 Released: 2009-03-24 
• Deposition Author(s): Keller, N., Zerbe, O., Mares, J., Gruetter, M.G.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: target function 

Literature

Structural and biochemical studies on procaspase-8: new insights on initiator caspase activation.

Keller, N., Mares, J., Zerbe, O., Grutter, M.G.

(2009) Structure 17: 438-448

• PubMed: 19278658 
• DOI: 10.1016/j.str.2008.12.019


• PubMed Abstract: 
  

Caspases are proteases with an active-site cysteine and aspartate specificity in their substrates. They are involved in apoptotic cell death and inflammation, and dysfunction of these enzymes is directly linked to a variety of diseases. Caspase-8 initiates an apoptotic pathway triggered by external stimuli. It was previously characterized in its active inhibitor bound state by crystallography. Here we present the solution structure of the monomeric unprocessed catalytic domain of the caspase-8 zymogen, procaspase-8, showing for the first time the position of the linker and flexibility of the active site forming loops. Biophysical studies of carefully designed mutants allowed disentangling dimerization and processing, and we could demonstrate lack of activity of monomeric uncleaved procaspase-8 and of a processed but dimerization-incompetent mutant. The data provide experimental support in so-far unprecedented detail, and reveal why caspase-8 (and most likely other initiator caspases) needs the dimerization platform during activation.

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Organizational Affiliation: 

Institute of Biochemistry, University of Zurich, CH-8057 Zurich, Switzerland.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Caspase-8	A	266	Homo sapiens	Mutation(s): 1  Gene Names: CASP8 (MCH5) EC: 3.4.22.61
Find proteins for Q14790 (Homo sapiens) Go to Gene View: CASP8 Go to UniProtKB:  Q14790

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: target function 
• Olderado: 2K7Z Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-08-28 
• Released Date: 2009-03-24 
• Deposition Author(s): Keller, N., Zerbe, O., Mares, J., Gruetter, M.G.

Revision History 

• Version 1.0: 2009-03-24
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance