Free acetyl-CypA orthorhombic form

Experimental Data Snapshot

  • Resolution: 1.20 Å
  • R-Value Free: 0.156 
  • R-Value Work: 0.126 
  • R-Value Observed: 0.128 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Acetylation Regulates Cyclophilin a Catalysis, Immunosuppression and HIV Isomerization.

Lammers, M.Neumann, H.Chin, J.W.James, L.C.

(2010) Nat Chem Biol 6: 331

  • DOI: https://doi.org/10.1038/nchembio.342
  • Primary Citation of Related Structures:  
    2X25, 2X2A, 2X2C, 2X2D

  • PubMed Abstract: 

    Cyclophilin A (CypA) is a ubiquitous cis-trans prolyl isomerase with key roles in immunity and viral infection. CypA suppresses T-cell activation through cyclosporine complexation and is required for effective HIV-1 replication in host cells. We show that CypA is acetylated in diverse human cell lines and use a synthetically evolved acetyllysyl-tRNA synthetase/tRNA(CUA) pair to produce recombinant acetylated CypA in Escherichia coli. We determined atomic-resolution structures of acetylated CypA and its complexes with cyclosporine and HIV-1 capsid. Acetylation markedly inhibited CypA catalysis of cis to trans isomerization and stabilized cis rather than trans forms of the HIV-1 capsid. Furthermore, CypA acetylation antagonized the immunosuppressive effects of cyclosporine by inhibiting the sequential steps of cyclosporine binding and calcineurin inhibition. Our results reveal that acetylation regulates key functions of CypA in immunity and viral infection and provide a general set of mechanisms by which acetylation modulates interactions to regulate cell function.

  • Organizational Affiliation

    Medical Research Council Laboratory of Molecular Biology, Protein and Nucleic Acid Chemistry Division, Cambridge, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE AA [auth B]169Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P62937 (Homo sapiens)
Explore P62937 
Go to UniProtKB:  P62937
GTEx:  ENSG00000196262 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP62937
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on ALY
Experimental Data & Validation

Experimental Data

  • Resolution: 1.20 Å
  • R-Value Free: 0.156 
  • R-Value Work: 0.126 
  • R-Value Observed: 0.128 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.222α = 90
b = 52.404β = 90
c = 89.236γ = 90
Software Package:
Software NamePurpose

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-03-23
    Type: Initial release
  • Version 1.1: 2011-06-09
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance