2AA6

Mineralocorticoid Receptor S810L Mutant with Bound Progesterone

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 

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This is version 1.4 of the entry. See complete history. 


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

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

  • 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 ...

    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.

    Organizational Affiliation: 

    Department of Gene Expression and Protein Biochemistry, GlaxoSmithKline, Research Triangle Park, North Carolina 27709, USA. randy.k.bledsoe@gsk.com



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Mineralocorticoid receptorA, B275Homo sapiensMutation(s): 2 
Gene Names: NR3C2, MCR, MLR
UniProt & NIH Common Fund Data Resources
Find proteins for P08235 (Homo sapiens)
Explore P08235 
Go to UniProtKB:  P08235
PHAROS:  P08235
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08235
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
STR
Query on STR
Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]		PROGESTERONE
C21 H30 O2
RJKFOVLPORLFTN-LEKSSAKUSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
STR BindingDB:  2AA6 Kd: 0.39 (nM) from 1 assay(s)
IC50: min: 14, max: 30 (nM) from 3 assay(s)
PDBBind:  2AA6 Kd: 0.39 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.155α = 90
b = 89.676β = 90
c = 171.845γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-07-26
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description
  • Version 1.4: 2021-10-20
    Changes: Database references, Derived calculations