2OZ7

Crystal structure of the human androgen receptor T877A mutant ligand-binding domain with cyproterone acetate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.253 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the T877A human androgen receptor ligand-binding domain complexed to cyproterone acetate provides insight for ligand-induced conformational changes and structure-based drug design.

Bohl, C.E.Wu, Z.Miller, D.D.Bell, C.E.Dalton, J.T.

(2007) J.Biol.Chem. 282: 13648-13655

  • DOI: 10.1074/jbc.M611711200

  • PubMed Abstract: 
  • Cyproterone acetate (CPA) is a steroidal antiandrogen used clinically in the treatment of prostate cancer. Compared with steroidal agonists for the androgen receptor (AR) (e.g. dihydrotestosterone, R1881), CPA is bulkier in structure and therefore se ...

    Cyproterone acetate (CPA) is a steroidal antiandrogen used clinically in the treatment of prostate cancer. Compared with steroidal agonists for the androgen receptor (AR) (e.g. dihydrotestosterone, R1881), CPA is bulkier in structure and therefore seemingly incompatible with the binding pockets observed in currently available x-ray crystal structures of the AR ligand-binding domain (LBD). We solved the x-ray crystal structure of the human AR LBD bound to CPA at 1.8A in the T877A variant, a mutation known to increase the agonist activity of CPA and therefore facilitate purification and crystal formation of the receptor.drug complex. The structure demonstrates that bulk from the 17alpha-acetate group of CPA induces movement of the Leu-701 side chain, which results in partial unfolding of the C-terminal end of helix 11 and displacement of the loop between helices 11 and 12 in comparison to all other AR LBD crystal structures published to date. This structural alteration leads to an expansion of the AR binding cavity to include an additional pocket bordered by Leu-701, Leu-704, Ser-778, Met-780, Phe-876, and Leu-880. Further, we found that CPA invokes transcriptional activation in the L701A AR at low nanomolar concentrations similar to the T877A mutant. Analogous mutations in the glucocorticoid receptor (GR) and progesterone receptor were constructed, and we found that CPA was also converted into a potent agonist in the M560A GR. Altogether, these data offer information for structure-based drug design, elucidate flexible regions of the AR LBD, and provide insight as to how CPA antagonizes the AR and GR.


    Organizational Affiliation

    Division of Pharmaceutics, College of Pharmacy, Ohio State University, Columbus, Ohio 43210, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Androgen receptor
A
249Homo sapiensMutation(s): 1 
Gene Names: AR (DHTR, NR3C4)
Find proteins for P10275 (Homo sapiens)
Go to Gene View: AR
Go to UniProtKB:  P10275
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA4
Query on CA4

Download SDF File 
Download CCD File 
A
CYPROTERONE ACETATE
C24 H29 Cl O4
UWFYSQMTEOIJJG-FDTZYFLXSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
CA4IC50: 23 - 18000 nM (99) BINDINGDB
CA4Ki: 14 nM (99) BINDINGDB
CA4Ki: 14 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.253 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 56.504α = 90.00
b = 65.820β = 90.00
c = 71.506γ = 90.00
Software Package:
Software NamePurpose
CrystalCleardata collection
SCALEPACKdata scaling
CNSrefinement
CrystalCleardata reduction
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-03-27
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance