Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

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

Macromolecule Content

• Total Structure Weight: 32410.80 
• Atom Count: 2276 
• Residue Count: 274 
• Unique protein chains: 2

3MNO

Crystal structure of the agonist form of mouse glucocorticoid receptor stabilized by (A611V, F608S) mutations at 1.55A

• DOI: 10.2210/pdb3MNO/pdb

• Classification: HORMONE RECEPTOR
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): 2 


• Deposited: 2010-04-22 Released: 2010-09-15 
• Deposition Author(s): Schoch, G.A., Seitz, T., Benz, J., Banner, D., Stihle, M., D'Arcy, B., Thoma, R., Sterner, R., Hennig, M., Ruf, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 0.187 
• R-Value Work: 0.165 

Literature

Enhancing the stability and solubility of the glucocorticoid receptor ligand-binding domain by high-throughput library screening.

Seitz, T., Thoma, R., Schoch, G.A., Stihle, M., Benz, J., D'Arcy, B., Wiget, A., Ruf, A., Hennig, M., Sterner, R.

(2010) J.Mol.Biol. 403: 562-577

• PubMed: 20850457 
• DOI: 10.1016/j.jmb.2010.08.048
• Primary Citation of Related Structures:  
  3MNP, 3MNE


• PubMed Abstract: 
  

The human glucocorticoid receptor ligand-binding domain (hGR-LBD) is an important drug target for the treatment of various diseases. However, the low intrinsic stability and solubility of hGR-LBD have rendered its purification and biophysical characterization difficult. In order to overcome these problems, we have stabilized hGR-LBD by a combination of random mutagenesis and high-throughput screening using fluorescence-activated cell sorting (FACS) with enhanced green fluorescent protein (eGFP) as folding reporter. Two plasmid-encoded gene libraries of hGR-LBD fused to the egfp gene were expressed in Escherichia coli, followed by eight rounds of FACS screening, in each of which 10(8) cells were analyzed. The hgr-lbd mutants isolated by this approach contained numerous amino acid exchanges, and four beneficial ones (A605V, V702A, E705G, and M752T) were followed up in detail. Their characterization showed that the fluorescence of hGR-LBD-eGFP fusions is correlated linearly with the stability and solubility of hGR-LBD in the absence of eGFP. When combined, the four exchanges increased the thermal stability of hGR-LBD by more than 8 °C and enhanced its purification yield after expression in E. coli by about 26-fold. The introduction of three beneficial exchanges into the homologous ligand-binding domain of mouse enabled its X-ray structure determination at high resolution, which showed how the exchanges stabilize the protein and revealed atomic details that will guide future drug design. Our results demonstrate that large eGFP fusion libraries can be screened by FACS with extreme sensitivity and efficiency, yielding stabilized eukaryotic proteins suitable for biophysical characterization and structure determination.

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Organizational Affiliation: 

Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstrasse 31, D-93053 Regensburg, Germany.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Glucocorticoid receptor	A	261	Mus musculus	Mutation(s): 2  Gene Names: Nr3c1 (Grl, Grl1)
Find proteins for P06537 (Mus musculus) Go to UniProtKB:  P06537

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Nuclear receptor coactivator 2 peptide	B	13	Mus musculus	Mutation(s): 0  Gene Names: Ncoa2 (Grip1, Src2, Tif2)
Find proteins for Q61026 (Mus musculus) Go to UniProtKB:  Q61026

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SCN	A	THIOCYANATE ION C N S ZMZDMBWJUHKJPS-UHFFFAOYSA-M
GOL	A	GLYCEROL GLYCERIN; PROPANE-1,2,3-TRIOL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
DEX	A	DEXAMETHASONE 9A-FLUORO-16BETA-METHYLPREDNISOLONE C22 H29 F O5 UREBDLICKHMUKA-CXSFZGCWSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
DEX	IC50: 0.5 - 21 nM (94) BINDINGDB
DEX	EC50: 0.2 - 17 nM (94) BINDINGDB
DEX	Ki: 0.7 - 6.8 nM (94) BINDINGDB
DEX	Kd: 19 nM (94) BINDINGDB

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 0.187 
• R-Value Work: 0.165 
• Space Group: P 6₅

Unit Cell:

Length (Å)	Angle (°)
a = 71.405	α = 90.00
b = 71.405	β = 90.00
c = 127.910	γ = 120.00

Software Package:

Software Name	Purpose
BUSTER-TNT	refinement
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-04-22 
• Released Date: 2010-09-15 
• Deposition Author(s): Schoch, G.A., Seitz, T., Benz, J., Banner, D., Stihle, M., D'Arcy, B., Thoma, R., Sterner, R., Hennig, M., Ruf, A.

Revision History 

• Version 1.0: 2010-09-15
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance