The Crystal Structure of Aspergillus fumigatus Cyclophilin reveals 3D Domain Swapping of a Central Element

Experimental Data Snapshot

  • Resolution: 1.85 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 

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The Crystal Structure of Aspergillus Fumigatus Cyclophilin Reveals 3D Domain Swapping of a Central Element

Limacher, A.Kloer, D.P.Fluckiger, S.Folkers, G.Crameri, R.Scapozza, L.

(2006) Structure 14: 185

  • DOI: https://doi.org/10.1016/j.str.2005.10.015
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The crystal structure of Aspergillus fumigatus cyclophilin (Asp f 11) was solved by the multiwavelength anomalous dispersion method and was refined to a resolution of 1.85 A with R and R(free) values of 18.9% and 21.4%, respectively. Many cyclophilin structures have been solved to date, all showing the same monomeric conformation. In contrast, the structure of A. fumigatus cyclophilin reveals dimerization by 3D domain swapping and represents one of the first proteins with a swapped central domain. The domain-swapped element consists of two beta strands and a subsequent loop carrying a conserved tryptophan. The tryptophan binds into the active site, inactivating cis-trans isomerization. This might be a means of biological regulation. The two hinge loops leave the protein prone to misfolding. In this context, alternative forms of 3D domain swapping that can lead to N- or C-terminally swapped dimers, oligomers, and aggregates are discussed.

  • Organizational Affiliation

    Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, 8093 Zurich, Switzerland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
172Aspergillus fumigatusMutation(s): 0 
Find proteins for Q4WHY9 (Aspergillus fumigatus (strain ATCC MYA-4609 / CBS 101355 / FGSC A1100 / Af293))
Explore Q4WHY9 
Go to UniProtKB:  Q4WHY9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ4WHY9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.85 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.829α = 90
b = 64.829β = 90
c = 156.288γ = 120
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: 2006-01-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance