Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 4-mer - A2B1C1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 62.22 kDa 
• Atom Count: 3936 
• Modelled Residue Count: 481 
• Deposited Residue Count: 540 
• Unique protein chains: 2

2B23

Human estrogen receptor alpha ligand-binding domain and a glucocorticoid receptor-interacting protein 1 NR box II peptide

• DOI: 10.2210/pdb2B23/pdb

• Classification: HORMONE/GROWTH FACTOR RECEPTOR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2005-09-16 Released: 2006-09-19 
• Deposition Author(s): Rajan, S.S., Hsieh, R.W., Sharma, S.K., Greene, G.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.272 
• R-Value Work: 0.214 
• R-Value Observed: 0.217 

Literature

NFkappaB selectivity of estrogen receptor ligands revealed by comparative crystallographic analyses

Nettles, K.W., Bruning, J.B., Gil, G., Nowak, J., Sharma, S.K., Hahm, J.B., Kulp, K., Hochberg, R.B., Zhou, H., Katzenellenbogen, J.A., Katzenellenbogen, B.S., Kim, Y., Joachmiak, A., Greene, G.L.

(2008) Nat Chem Biol 4: 241-247

• PubMed: 18344977 
• DOI: 10.1038/nchembio.76
• Primary Citation of Related Structures:  
  2QA8, 2QA6, 2QAB, 2QGW, 2QH6, 2QGT, 2QR9, 2QSE, 2QXM, 2B23


• PubMed Abstract: 
  

Our understanding of how steroid hormones regulate physiological functions has been significantly advanced by structural biology approaches. However, progress has been hampered by misfolding of the ligand binding domains in heterologous expression systems and by conformational flexibility that interferes with crystallization. Here, we show that protein folding problems that are common to steroid hormone receptors are circumvented by mutations that stabilize well-characterized conformations of the receptor. We use this approach to present the structure of an apo steroid receptor that reveals a ligand-accessible channel allowing soaking of preformed crystals. Furthermore, crystallization of different pharmacological classes of compounds allowed us to define the structural basis of NFkappaB-selective signaling through the estrogen receptor, thus revealing a unique conformation of the receptor that allows selective suppression of inflammatory gene expression. The ability to crystallize many receptor-ligand complexes with distinct pharmacophores allows one to define structural features of signaling specificity that would not be apparent in a single structure.

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Organizational Affiliation: 

Department of Cancer Biology, The Scripps Research Institute, 5353 Parkside Drive, Jupiter, Florida 33458, USA. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Estrogen receptor	A, B	257	Homo sapiens	Mutation(s): 4  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
Nuclear receptor coactivator 2	C, D	13	N/A	Mutation(s): 0
Find proteins for Q15596 (Homo sapiens) Explore Q15596  Go to UniProtKB:  Q15596
NIH Common Fund Data Resources
PHAROS:  Q15596 GTEx:  ENSG00000140396

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
CME	A,B	L-PEPTIDE LINKING	C5 H11 N O3 S2		CYS

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.272 
• R-Value Work: 0.214 
• R-Value Observed: 0.217 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 54.372	α = 90
b = 80.905	β = 109.68
c = 58.241	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
SCALEPACK	data scaling
XTALVIEW	refinement
HKL-2000	data collection
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-09-16 
• Released Date: 2006-09-19 
Deposition Author(s): Rajan, S.S., Hsieh, R.W., Sharma, S.K., Greene, G.L.

Revision History  

• Version 1.0: 2006-09-19
  Type: Initial release
  
• Version 1.1: 2008-03-10
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.3: 2018-04-04
  Changes: Data collection
• Version 1.4: 2018-04-11
  Changes: Data collection
• Version 1.5: 2019-07-24
  Changes: Data collection, Derived calculations, Refinement description