Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 62.54 kDa 
• Atom Count: 3896 
• Modelled Residue Count: 474 
• Deposited Residue Count: 536 
• Unique protein chains: 3

2JFA

ESTROGEN RECEPTOR ALPHA LBD IN COMPLEX WITH AN AFFINITY-SELECTED COREPRESSOR PEPTIDE

• DOI: 10.2210/pdb2JFA/pdb

• Classification: TRANSCRIPTION
• Organism(s): Homo sapiens, synthetic construct
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2007-01-29 Released: 2007-02-20 
• Deposition Author(s): Heldring, N., Pawson, T., McDonnell, D., Treuter, E., Gustafsson, J.A., Pike, A.C.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.55 Å
• R-Value Free: 0.213 
• R-Value Work: 0.193 
• R-Value Observed: 0.194 

Literature

Structural Insights Into Corepressor Recognition by Antagonist-Bound Estrogen Receptors.

Heldring, N., Pawson, T., Mcdonnell, D., Treuter, E., Gustafsson, J.A., Pike, A.C.W.

(2007) J Biol Chem 282: 10449

• PubMed: 17283072 
• DOI: 10.1074/jbc.M611424200
• Primary Citation of Related Structures:  
  2JFA, 2JF9


• PubMed Abstract: 
  

Direct recruitment of transcriptional corepressors to estrogen receptors (ER) is thought to contribute to the tissue-specific effects of clinically important ER antagonists. Here, we present the crystal structures of two affinity-selected peptides in complex with antagonist-bound ERalpha ligand-binding domain. Both peptides adopt helical conformations, bind along the activation function 2 coregulator interaction surface, and mimic corepressor (CoRNR) sequence motif binding. Peptide binding is weak in a wild-type context but significantly enhanced by removal of ER helix 12. This region contains a previously unrecognized CoRNR motif that is able to compete with corepressors for binding to activation function 2, thereby providing a structural explanation for the poor ability of ER to directly interact with classical corepressors. Furthermore, the ability of other sequence motifs to mimic corepressor binding raises the possibility that coregulators do not necessarily require CoRNR motifs for direct recruitment to antagonist-bound ER.

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Organizational Affiliation: 

Department of Biosciences and Nutrition, Karolinska Institutet, S-14157 Huddinge, Sweden. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ESTROGEN RECEPTOR	A	252	Homo sapiens	Mutation(s): 0  Gene Names: ESR1, ESR, NR3A1
Find proteins for P03372 (Homo sapiens) Explore P03372  Go to UniProtKB:  P03372
NIH Common Fund Data Resources
PHAROS:  P03372 GTEx:  ENSG00000091831

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
ESTROGEN RECEPTOR	B	252	Homo sapiens	Mutation(s): 0  Gene Names: ESR1, ESR, NR3A1
Find proteins for P03372 (Homo sapiens) Explore P03372  Go to UniProtKB:  P03372
NIH Common Fund Data Resources
PHAROS:  P03372 GTEx:  ENSG00000091831

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
COREPRESSOR PEPTIDE	P, Q	16	synthetic construct	Mutation(s): 0

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
RAL	A, B	RALOXIFENE C28 H27 N O4 S GZUITABIAKMVPG-UHFFFAOYSA-N
SO4	A, B	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
CCS	B	L-PEPTIDE LINKING	C5 H9 N O4 S		CYS

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
RAL	EC50:  2.4000000953674316   nM  BindingDB
RAL	IC50:  0.20000000298023224   nM  BindingDB
RAL	Ki:  0.4300000071525574   nM  BindingDB
RAL	IC50:  22   nM  BindingDB
RAL	IC50:  1.7999999523162842   nM  BindingDB
RAL	IC50:  24   nM  BindingDB
RAL	Ki:  0.4000000059604645   nM  BindingDB
RAL	IC50:  222   nM  BindingDB
RAL	IC50:  0.7300000190734863   nM  BindingDB
RAL	Ki:  0.029999999329447746   nM  BindingDB
RAL	IC50:  0.3400000035762787   nM  BindingDB
RAL	EC50:  4.320000171661377   nM  BindingDB
RAL	IC50:  170   nM  BindingDB
RAL	Ki:  0.3700000047683716   nM  BindingDB
RAL	IC50:  0.4699999988079071   nM  BindingDB
RAL	IC50:  0.7200000286102295   nM  BindingDB
RAL	IC50:  7   nM  BindingDB
RAL	EC50:  22   nM  BindingDB
RAL	IC50:  7.699999809265137   nM  BindingDB
RAL	Ki:  0.2199999988079071   nM  BindingDB
RAL	IC50:  0.8899999856948853   nM  BindingDB
RAL	IC50:  20.600000381469727   nM  BindingDB
RAL	IC50:  0.699999988079071   nM  BindingDB
RAL	IC50:  4   nM  BindingDB
RAL	IC50:  0.699999988079071   nM  BindingDB
RAL	IC50:  0.30000001192092896   nM  BindingDB
RAL	IC50:  1.899999976158142   nM  BindingDB
RAL	IC50:  0.46000000834465027   nM  BindingDB
RAL	Ki:  2   nM  BindingDB
RAL	Ki:  0.3799999952316284   nM  BindingDB
RAL	IC50:  2   nM  BindingDB
RAL	IC50:  7   nM  BindingDB

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.55 Å
• R-Value Free: 0.213 
• R-Value Work: 0.193 
• R-Value Observed: 0.194 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 126.573	α = 90
b = 126.573	β = 90
c = 113.429	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2007-01-29 
• Released Date: 2007-02-20 
Deposition Author(s): Heldring, N., Pawson, T., McDonnell, D., Treuter, E., Gustafsson, J.A., Pike, A.C.W.

Revision History  

• Version 1.0: 2007-02-20
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Refinement description, Version format compliance
• Version 1.2: 2016-12-21
  Changes: Source and taxonomy, Structure summary
• Version 1.3: 2018-01-24
  Changes: Source and taxonomy