ISDA

Deposition Date 2002-02-21

Release Date 2002-05-01

Last Version Date 2023-08-16

Entry Detail

PDB ID:

1L2I

Keywords:

TRANSCRIPTION RECEPTOR/COACTIVATOR

Title:

Human Estrogen Receptor alpha Ligand-binding Domain in Complex with (R,R)-5,11-cis-diethyl-5,6,11,12-tetrahydrochrysene-2,8-diol and a Glucocorticoid Receptor Interacting Protein 1 NR box II Peptide

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)
(Taxon ID: )

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.95 Å

R-Value Free:

0.24

R-Value Work:

0.20

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:ESTROGEN RECEPTOR
Gene (Uniprot):ESR1
Chain IDs:A, B
Chain Length:261
Number of Molecules:2
Biological Source:Homo sapiens

UniProt ID:P03372 Pfam ID:PF00104

Protein Blast

Polymer Type:polypeptide(L)
Molecule:GLUCOCORTICOID RECEPTOR-INTERACTING PROTEIN 1
Gene (Uniprot):Ncoa2
Chain IDs:C, D
Chain Length:13
Number of Molecules:2
Biological Source:

UniProt ID:Q61026

Primary Citation

Structural characterization of a subtype-selective ligand reveals a novel mode of estrogen receptor antagonism.

Shiau, A.K, Barstad, D, Radek, J.T, Meyers, M.J, Nettles, K.W, Katzenellenbogen, B.S, Katzenellenbogen, J.A, Agard, D.A, Greene, G.L, Shiau, A.K, Barstad, D, Loria, P.M, Cheng, L, Kushner, P.J, Agard, D.A, Greene, G.L, Meyers, M.J, Sun, J, Carlson, K.E, Katzenellenbogen, B.S, Katzenellenbogen, J.A.Show

Nat.Struct.Biol. 9 359 364 (2002)

PMID: 11953755

Abstact

The R,R enantiomer of 5,11-cis-diethyl-5,6,11,12-tetrahydrochrysene-2,8-diol (THC) exerts opposite effects on the transcriptional activity of the two estrogen receptor (ER) subtypes, ER alpha and ER beta. THC acts as an ER alpha agonist and as an ER beta antagonist. We have determined the crystal structures of the ER alpha ligand binding domain (LBD) bound to both THC and a fragment of the transcriptional coactivator GRIP1, and the ER beta LBD bound to THC. THC stabilizes a conformation of the ER alpha LBD that permits coactivator association and a conformation of the ER beta LBD that prevents coactivator association. A comparison of the two structures, taken together with functional data, reveals that THC does not act on ER beta through the same mechanisms used by other known ER antagonists. Instead, THC antagonizes ER beta through a novel mechanism we term 'passive antagonism'.

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