C domain of human cyclophilin-33(hcyp33)

Experimental Data Snapshot

  • Resolution: 1.88 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.172 

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1.88A crystal structure of the C domain of hCyP33: A novel domain of peptidyl-prolyl cis-trans isomerase

Wang, T.Yun, C.-H.Gu, S.-Y.Chang, W.-R.Liang, D.-C.

(2005) Biochem Biophys Res Commun 333: 845-849

  • DOI: https://doi.org/10.1016/j.bbrc.2005.06.006
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Cyclophilins (CyPs) are a widespreading protein family in living organisms and possess the activity of peptidyl-prolyl cis-trans isomerase (PPIase), which is inhibited by cyclosporin A (CsA). The human nuclear cyclophilin (hCyP33) is the first protein which was found to contain two RNA binding domains at the amino-terminus and a PPIase domain at the carboxyl-terminus. We isolated the hCyP33 gene from the human hematopoietic stem/progenitor cells and expressed it in Escherichia coli, and determined the crystal structure of the C domain of hCyP33 at 1.88 A resolution. The core structure is a beta-barrel covered by two alpha-helices. Superposition of the structure of the C domain of hCyP33 with the structure of CypA suggests that the C domain contains PPIase active site which binds to CsA. Furthermore, C domain seems to be able to bind with the Gag-encoded capsid (CA) of HIV-1 and may affect the viral replication of HIV-1. A key residue of the active site is changed from Ala-103-CypA to Ser-239-hCyP33, which may affect the PPIase domain/substrates interactions.

  • Organizational Affiliation

    National Key Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing 100101, PR China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Peptidyl-prolyl cis-trans isomerase E165Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UNP9 (Homo sapiens)
Explore Q9UNP9 
Go to UniProtKB:  Q9UNP9
GTEx:  ENSG00000084072 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UNP9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.88 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.172 
  • Space Group: P 42 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.61α = 90
b = 66.61β = 90
c = 76.78γ = 90
Software Package:
Software NamePurpose
MAR345data collection
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-08-02
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description