Complex of Fk506 with the Fk1 domain mutant A19T of FKBP51

Experimental Data Snapshot

  • Resolution: 1.10 Å
  • R-Value Free: 0.157 
  • R-Value Work: 0.123 
  • R-Value Observed: 0.124 

Starting Model: experimental
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Structural characterization of the PPIase domain of FKBP51, a cochaperone of human Hsp90.

Bracher, A.Kozany, C.Thost, A.K.Hausch, F.

(2011) Acta Crystallogr D Biol Crystallogr 67: 549-559

  • DOI: https://doi.org/10.1107/S0907444911013862
  • Primary Citation of Related Structures:  
    3O5D, 3O5E, 3O5F, 3O5G, 3O5I, 3O5J, 3O5K, 3O5L, 3O5M, 3O5O, 3O5P, 3O5Q, 3O5R

  • PubMed Abstract: 

    Steroid hormone receptors are key components of mammalian stress and sex hormone systems. Many of them rely on the Hsp90 chaperone system for full function and are further fine-tuned by Hsp90-associated peptidyl-prolyl isomerases such as FK506-binding proteins 51 and 52. FK506-binding protein 51 (FKBP51) has been shown to reduce glucocorticoid receptor signalling and has been genetically associated with human stress resilience and with numerous psychiatric disorders. The peptidyl-prolyl isomerase domain of FKBP51 contains a high-affinity binding site for the natural products FK506 and rapamycin and has further been shown to convey most of the inhibitory activity on the glucocorticoid receptor. FKBP51 has therefore become a prime new target for the treatment of stress-related affective disorders that could be amenable to structure-based drug design. Here, a series of high-resolution structures of the peptidyl-prolyl isomerase domain of FKBP51 as well as a cocrystal structure with the prototypic ligand FK506 are described. These structures provide a detailed picture of the drug-binding domain of FKBP51 and the molecular binding mode of its ligand as a starting point for the rational design of improved inhibitors.

  • Organizational Affiliation

    Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany. bracher@biochem.mpg.de

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Peptidyl-prolyl cis-trans isomerase FKBP5128Homo sapiensMutation(s): 0 
Gene Names: AIG6FKBP5FKBP51
UniProt & NIH Common Fund Data Resources
Find proteins for Q13451 (Homo sapiens)
Explore Q13451 
Go to UniProtKB:  Q13451
GTEx:  ENSG00000096060 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13451
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on FK5

Download Ideal Coordinates CCD File 
C44 H69 N O12
Binding Affinity Annotations 
IDSourceBinding Affinity
FK5 BindingDB:  3O5R Ki: 79 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 1.10 Å
  • R-Value Free: 0.157 
  • R-Value Work: 0.123 
  • R-Value Observed: 0.124 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.051α = 90
b = 54.784β = 90
c = 56.816γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-06-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2012-03-28
    Changes: Database references
  • Version 1.3: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description