1ZUC

Progesterone receptor ligand binding domain in complex with the nonsteroidal agonist tanaproget


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.179 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Molecular and pharmacological properties of a potent and selective novel nonsteroidal progesterone receptor agonist tanaproget

Zhang, Z.Olland, A.M.Zhu, Y.Cohen, J.Berrodin, T.Chippari, S.Appavu, C.Li, S.Wilhem, J.Chopra, R.Fensome, A.Zhang, P.Wrobel, J.Unwalla, R.J.Lyttle, C.R.Winneker, R.C.

(2005) J.Biol.Chem. 280: 28468-28475

  • DOI: 10.1074/jbc.M504144200

  • PubMed Abstract: 
  • Progesterone receptor (PR) agonists have several important applications in women's health, such as in oral contraception and post-menopausal hormone therapy. Currently, all PR agonists used clinically are steroids. Because of their interactions with ...

    Progesterone receptor (PR) agonists have several important applications in women's health, such as in oral contraception and post-menopausal hormone therapy. Currently, all PR agonists used clinically are steroids. Because of their interactions with other steroid receptors, steroid-metabolizing enzymes, or other steroid-signaling pathways, these drugs can pose significant side effects in some women. Efforts to discover novel nonsteroidal PR agonists with improved biological properties led to the discovery of tanaproget (TNPR). TNPR binds to the PR from various species with a higher relative affinity than reference steroidal progestins. In T47D cells, TNPR induces alkaline phosphatase activity with an EC(50) value of 0.1 nm, comparable with potent steroidal progestins such as medroxyprogesterone acetate (MPA) and trimegestone (TMG), albeit with a reduced efficacy ( approximately 60%). In a mammalian two-hybrid assay to measure PR agonist-induced interaction between steroid receptor co-activator-1 and PR, TNPR showed similar potency (EC(50) value of 0.02 nm) and efficacy to MPA and TMG. Importantly, in key animal models such as the rat ovulation inhibition assay, TNPR demonstrates full efficacy and an enhanced progestational potency (30-fold) when compared with MPA and TMG. Furthermore, TNPR has relatively weak interactions with other steroid receptors and binding proteins and little effect on cytochrome P450 metabolic pathways. Finally, the three-dimensional crystal structure of the PR ligand binding domain with TNPR has been delineated to demonstrate how this nonsteroidal ligand achieves its high binding affinity. Therefore, TNPR is a structurally novel and very selective PR agonist with an improved preclinical pharmacological profile.


    Organizational Affiliation

    Women's Health Research Institute, Wyeth Research, Collegeville, Pennsylvania 19426, USA. zhangz@wyeth.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Progesterone receptor
B, A
259Homo sapiensMutation(s): 0 
Gene Names: PGR (NR3C3)
Find proteins for P06401 (Homo sapiens)
Go to Gene View: PGR
Go to UniProtKB:  P06401
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
T98
Query on T98

Download SDF File 
Download CCD File 
A, B
5-(4,4-DIMETHYL-2-THIOXO-1,4-DIHYDRO-2H-3,1-BENZOXAZIN-6-YL)-1-METHYL-1H-PYRROLE-2-CARBONITRILE
TANAPROGET
C16 H15 N3 O S
PYVFWTPEBMRKSR-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
T98EC50: 0.2 nM (100) BINDINGDB
T98IC50: 0.5 nM (100) BINDINGDB
T98IC50: 1.7 nM BINDINGMOAD
T98IC50: 1.7 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.179 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 57.519α = 90.00
b = 64.497β = 95.76
c = 70.406γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
AMoREphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-07-05
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance