Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 64086.11 
• Atom Count: 4188 
• Residue Count: 550 
• Unique protein chains: 1

2AAX

Mineralocorticoid Receptor Double Mutant with Bound Cortisone

• DOI: 10.2210/pdb2AAX/pdb

• Classification: TRANSCRIPTION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): 2 


• Deposited: 2005-07-14 Released: 2005-07-26 
• Deposition Author(s): Bledsoe, R.K., Madauss, K.P., Holt, J.A., Apolito, C.J., Lambert, M.H., Pearce, K.H., Stanley, T.B., Stewart, E.L., Trump, R.P., Willson, T.M., Williams, S.P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.212 
• R-Value Work: 0.185 

Literature

A Ligand-mediated Hydrogen Bond Network Required for the Activation of the Mineralocorticoid Receptor

Bledsoe, R.K., Madauss, K.P., Holt, J.A., Apolito, C.J., Lambert, M.H., Pearce, K.H., Stanley, T.B., Stewart, E.L., Trump, R.P., Willson, T.M., Williams, S.P.

(2005) J.Biol.Chem. 280: 31283-31293

• PubMed: 15967794 
• DOI: 10.1074/jbc.M504098200
• Primary Citation of Related Structures:  
  2AB2, 2AA7, 2AA6, 2AA5, 2AA2


• PubMed Abstract: 
  

Ligand binding is the first step in hormone regulation of mineralocorticoid receptor (MR) activity. Here, we report multiple crystal structures of MR (NR3C2) bound to both agonist and antagonists. These structures combined with mutagenesis studies reveal that maximal receptor activation involves an intricate ligand-mediated hydrogen bond network with Asn770 which serves dual roles: stabilization of the loop preceding the C-terminal activation function-2 helix and direct contact with the hormone ligand. In addition, most activating ligands hydrogen bond to Thr945 on helix 10. Structural characterization of the naturally occurring S810L mutant explains how stabilization of a helix 3/helix 5 interaction can circumvent the requirement for this hydrogen bond network. Taken together, these results explain the potency of MR activation by aldosterone, the weak activation induced by progesterone and the antihypertensive agent spironolactone, and the binding selectivity of cortisol over cortisone.

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Organizational Affiliation: 

Department of Gene Expression and Protein Biochemistry, GlaxoSmithKline, Research Triangle Park, North Carolina 27709, USA. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Mineralocorticoid receptor	A, B	275	Homo sapiens	Mutation(s): 2  Gene Names: NR3C2 (MCR, MLR)
Find proteins for P08235 (Homo sapiens) Go to Gene View: NR3C2 Go to UniProtKB:  P08235

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SO4	A	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
PDN	A, B	17,21-DIHYDROXYPREGNA-1,4-DIENE-3,11,20-TRIONE PREDNISONE; 1,4 PREGNADIENE-17ALPHA,21-DIOL-3,11,20-TRIONE; 1-CORTISONE; DEHYDROCORTISONE C21 H26 O5 WZTZVUUYKIOIRV-LMZHSBCYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.212 
• R-Value Work: 0.185 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 42.320	α = 90.00
b = 90.125	β = 90.00
c = 172.537	γ = 90.00

Software Package:

Software Name	Purpose
HKL-2000	data reduction
DENZO	data reduction
REFMAC	refinement
PDB_EXTRACT	data extraction
SCALEPACK	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-07-14 
• Released Date: 2005-07-26 
• Deposition Author(s): Bledsoe, R.K., Madauss, K.P., Holt, J.A., Apolito, C.J., Lambert, M.H., Pearce, K.H., Stanley, T.B., Stewart, E.L., Trump, R.P., Willson, T.M., Williams, S.P.

Revision History 

• Version 1.0: 2005-07-26
  Type: Initial release
• Version 1.1: 2008-04-30
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-10-11
  Type: Refinement description