3NR2

Crystal structure of Caspase-6 zymogen


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.179 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structures of human caspase 6 reveal a new mechanism for intramolecular cleavage self-activation

Wang, X.-J.Cao, Q.Liu, X.Wang, K.-T.Mi, W.Zhang, Y.Li, L.-F.Leblanc, A.C.Su, X.-D.

(2010) Embo Rep. 11: 841-847

  • DOI: 10.1038/embor.2010.141
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Dimeric effectors caspase 3 and caspase 7 are activated by initiator caspase processing. In this study, we report the crystal structures of effector caspase 6 (CASP6) zymogen and N-Acetyl-Val-Glu-Ile-Asp-al-inhibited CASP6. Both of these forms of CAS ...

    Dimeric effectors caspase 3 and caspase 7 are activated by initiator caspase processing. In this study, we report the crystal structures of effector caspase 6 (CASP6) zymogen and N-Acetyl-Val-Glu-Ile-Asp-al-inhibited CASP6. Both of these forms of CASP6 have a dimeric structure, and in CASP6 zymogen the intersubunit cleavage site (190)TEVD(193) is well structured and inserts into the active site. This positions residue Asp 193 to be easily attacked by the catalytic residue Cys 163. We demonstrate biochemically that intramolecular cleavage at Asp 193 is a prerequisite for CASP6 self-activation and that this activation mechanism is dependent on the length of the L2 loop. Our results indicate that CASP6 can be activated and regulated through intramolecular self-cleavage.


    Organizational Affiliation

    National Laboratory of Protein Engineering & Plant Genetic Engineering, Peking University, Haidian District, Beijing, People's Republic of China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Caspase-6
A, B
294Homo sapiensMutation(s): 2 
Gene Names: CASP6 (MCH2)
EC: 3.4.22.59
Find proteins for P55212 (Homo sapiens)
Go to Gene View: CASP6
Go to UniProtKB:  P55212
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.179 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 127.983α = 90.00
b = 127.983β = 90.00
c = 167.912γ = 120.00
Software Package:
Software NamePurpose
MOLREPphasing
PROTEUM PLUSdata collection
PHENIXrefinement
PROTEUM PLUSdata scaling
PROTEUM PLUSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-10-27
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance