3KMZ

Crystal structure of RARalpha ligand binding domain in complex with the inverse agonist BMS493 and a corepressor fragment


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.175 

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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

A unique secondary-structure switch controls constitutive gene repression by retinoic acid receptor.

le Maire, A.Teyssier, C.Erb, C.Grimaldi, M.Alvarez, S.de Lera, A.R.Balaguer, P.Gronemeyer, H.Royer, C.A.Germain, P.Bourguet, W.

(2010) Nat Struct Mol Biol 17: 801-807

  • DOI: 10.1038/nsmb.1855
  • Primary Citation of Related Structures:  
    3KMR, 3KMZ

  • PubMed Abstract: 
  • In the absence of ligand, some nuclear receptors, including retinoic acid receptor (RAR), act as transcriptional repressors by recruiting corepressor complexes to target genes. This constitutive repression is crucial in metazoan reproduction, development and homeostasis ...

    In the absence of ligand, some nuclear receptors, including retinoic acid receptor (RAR), act as transcriptional repressors by recruiting corepressor complexes to target genes. This constitutive repression is crucial in metazoan reproduction, development and homeostasis. However, its specific molecular determinants had remained obscure. Using structural, biochemical and cell-based assays, we show that the basal repressive activity of RAR is conferred by an extended beta-strand that forms an antiparallel beta-sheet with specific corepressor residues. Agonist binding induces a beta-strand-to-alpha-helix transition that allows for helix H11 formation, which in turn provokes corepressor release, repositioning of helix H12 and coactivator recruitment. Several lines of evidence suggest that this structural switch could be implicated in the intrinsic repressor function of other nuclear receptors. Finally, we report on the molecular mechanism by which inverse agonists strengthen corepressor interaction and enhance gene silencing by RAR.


    Organizational Affiliation

    Institut National de la Santé et de la Recherche Médicale, U554, Montpellier, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Retinoic acid receptor alphaC [auth A],
A [auth B]
266Homo sapiensMutation(s): 0 
Gene Names: NR1B1RARA
UniProt & NIH Common Fund Data Resources
Find proteins for P10276 (Homo sapiens)
Explore P10276 
Go to UniProtKB:  P10276
PHAROS:  P10276
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP10276
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Nuclear receptor corepressor 1B [auth C],
D
19N/AMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for O75376 (Homo sapiens)
Explore O75376 
Go to UniProtKB:  O75376
PHAROS:  O75376
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO75376
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSO
Query on CSO
B [auth C],
D
L-PEPTIDE LINKINGC3 H7 N O3 SCYS
Binding Affinity Annotations 
IDSourceBinding Affinity
EQO BindingDB:  3KMZ IC50: 114 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.175 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.831α = 90
b = 105.625β = 89.92
c = 53.382γ = 90
Software Package:
Software NamePurpose
ProDCdata collection
MOLREPphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-06-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance