1ZH7

Structural and Biochemical Basis for Selective Repression of the Orphan Nuclear Receptor LRH-1 by SHP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.226 

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This is version 1.3 of the entry. See complete history


Literature

Structural and biochemical basis for selective repression of the orphan nuclear receptor liver receptor homolog 1 by small heterodimer partner

Li, Y.Choi, M.Suino, K.Kovach, A.Daugherty, J.Kliewer, S.A.Xu, H.E.

(2005) Proc Natl Acad Sci U S A 102: 9505-9510

  • DOI: 10.1073/pnas.0501204102
  • Primary Citation of Related Structures:  
    1ZGY, 1ZH7

  • PubMed Abstract: 
  • The functional interaction between the orphan nuclear receptors small heterodimer partner (SHP) and liver receptor homolog 1 (LRH-1), where SHP binds to LRH-1 and represses its constitutive transcriptional activity, is crucial for regulating genes involv ...

    The functional interaction between the orphan nuclear receptors small heterodimer partner (SHP) and liver receptor homolog 1 (LRH-1), where SHP binds to LRH-1 and represses its constitutive transcriptional activity, is crucial for regulating genes involved in cholesterol homeostasis. Here, we report structural and biochemical analyses of the LRH-1/SHP interaction. The crystal structure and modeling studies of the LRH-1 ligand-binding domain bound to either of the two LXXLL-related motifs of SHP show that the receptor undergoes conformational changes to accommodate the SHP docking and reveal key residues that determine the potency and selectivity of SHP binding. Through a combination of mutagenesis and binding studies, we demonstrate that only the second SHP LXXLL motif is required for repressing LRH-1, and this motif displays a strong preference for binding to LRH-1 over the closely related receptor steroidogeneic factor 1 (SF-1). Structural comparisons indicate that this binding selectivity is determined by residues flanking the core LXXLL motifs. These results establish a structural model for understanding how SHP interacts with LRH-1 to regulate cholesterol homeostasis and provide new insights into how nuclear receptor/coregulator selectivity is achieved.


    Organizational Affiliation

    Laboratory of Structural Sciences, Van Andel Research Institute, 333 Bostwick Avenue, Grand Rapids, MI 49503, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Orphan nuclear receptor NR5A2 AB243Mus musculusMutation(s): 0 
Gene Names: Nr5a2Lrh1
Find proteins for P45448 (Mus musculus)
Explore P45448 
Go to UniProtKB:  P45448
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
nuclear receptor subfamily 0, group B, member 2 CD11Rattus norvegicusMutation(s): 0 
Gene Names: Nr0b2Shp
Find proteins for P97947 (Rattus norvegicus)
Explore P97947 
Go to UniProtKB:  P97947
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.226 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 113.765α = 90
b = 35.126β = 92.61
c = 134.205γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MAR345data collection
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-08-02
    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