Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 28657.77 
• Atom Count: 1977 
• Residue Count: 246 
• Unique protein chains: 1

2IOG

Human estrogen receptor alpha ligand-binding domain in complex with compound 11F

• DOI: 10.2210/pdb2IOG/pdb

• Classification: HORMONE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 2006-10-10 Released: 2007-10-09 
• Deposition Author(s): Fitzgerald, P.M.D., Sharma, N.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.6 Å
• R-Value Free: 0.328 

Literature

Estrogen receptor ligands. Part 16: 2-Aryl indoles as highly subtype selective ligands for ERalpha

Dykstra, K.D., Guo, L., Birzin, E.T., Chan, W., Yang, Y.T., Hayes, E.C., DaSilva, C.A., Pai, L.-Y., Mosley, R.T., Kraker, B., Fitzgerald, P.M.D., DiNinno, F., Rohrer, S.P., Schaeffer, J.M., Hammond, M.L.

(2007) Bioorg.Med.Chem.Lett. 17: 2322-2328

• PubMed: 17289385 
• DOI: 10.1016/j.bmcl.2007.01.054
• Primary Citation of Related Structures:  
  2IOK


• PubMed Abstract: 
  

A novel class of indole ligands for estrogen receptor alpha have been discovered which exhibit potent affinity and high selectivity. Substitution of the bazedoxifene skeleton to the linker present in the HTS lead 1a provided 22b which was found to be 130-fold alpha-selective and acted as an antagonist of estradiol activity in uterine tissue and MCF-7 cancer cells.

---

Organizational Affiliation: 

Department of Medicinal Chemistry, Merck Research Laboratories, PO Box 2000, 800B-109 Rahway, NJ 07065, USA. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Estrogen receptor	A	246	Homo sapiens	Mutation(s): 0  Gene Names: ESR1 (ESR, NR3A1)
Find proteins for P03372 (Homo sapiens) Go to Gene View: ESR1 Go to UniProtKB:  P03372

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
IOG	A	N-[(1R)-3-(4-HYDROXYPHENYL)-1-METHYLPROPYL]-2-[2-PHENYL-6-(2-PIPERIDIN-1-YLETHOXY)-1H-INDOL-3-YL]ACETAMIDE C33 H39 N3 O3 FACGWONUFWMXPN-XMMPIXPASA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
IOG	IC50: 8 nM BINDINGMOAD
IOG	IC50: 8 nM PDBBIND

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.6 Å
• R-Value Free: 0.328 
• Space Group: P 6₅ 2 2

Unit Cell:

Length (Å)	Angle (°)
a = 58.220	α = 90.00
b = 58.220	β = 90.00
c = 276.660	γ = 120.00

Software Package:

Software Name	Purpose
X-GEN	data scaling
SHELXL	refinement
X-GEN	data reduction
ADSC	data collection

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-10-10 
• Released Date: 2007-10-09 
• Deposition Author(s): Fitzgerald, P.M.D., Sharma, N.

Revision History 

• Version 1.0: 2007-10-09
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance