Crystal structure of CT610 from Chlamydia trachomatis

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.195 

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Structure of the Chlamydia protein CADD reveals a redox enzyme that modulates host cell apoptosis.

Schwarzenbacher, R.Stenner-Liewen, F.Liewen, H.Robinson, H.Yuan, H.Bossy-Wetzel, E.Reed, J.C.Liddington, R.C.

(2004) J Biol Chem 279: 29320-29324

  • DOI: https://doi.org/10.1074/jbc.M401268200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The Chlamydia protein CADD (Chlamydia protein associating with death domains) has been implicated in the modulation of host cell apoptosis via binding to the death domains of tumor necrosis factor family receptors. Transfection of CADD into mammalian cells induces apoptosis. Here we present the CADD crystal structure, which reveals a dimer of seven-helix bundles. Each bundle contains a di-iron center adjacent to an internal cavity, forming an active site similar to that of methane mono-oxygenase hydrolase. We further show that CADD mutants lacking critical metal-coordinating residues are substantially less effective in inducing apoptosis but retain their ability to bind to death domains. We conclude that CADD is a novel redox protein toxin unique to Chlamydia species and propose that both its redox activity and death domain binding ability are required for its biological activity.

  • Organizational Affiliation

    The Burnham Institute, La Jolla, California 92037, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C
231Chlamydia trachomatisMutation(s): 4 
Gene Names: CT610
EC: 1
Find proteins for O84616 (Chlamydia trachomatis (strain D/UW-3/Cx))
Explore O84616 
Go to UniProtKB:  O84616
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO84616
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.50 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.195 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.553α = 90
b = 192.966β = 90
c = 93.74γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-05-04
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance