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: 2.5 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


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.USA 102: 9505-9510

  • DOI: 10.1073/pnas.0501204102
  • Primary Citation of Related Structures:  

  • 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 in ...

    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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Orphan nuclear receptor NR5A2
A, B
243Mus musculusMutation(s): 0 
Gene Names: Nr5a2 (Lrh1)
Find proteins for P45448 (Mus musculus)
Go to UniProtKB:  P45448
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
nuclear receptor subfamily 0, group B, member 2
C, D
11Rattus norvegicusMutation(s): 0 
Gene Names: Nr0b2 (Shp)
Find proteins for P97947 (Rattus norvegicus)
Go to UniProtKB:  P97947
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.226 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 113.765α = 90.00
b = 35.126β = 92.61
c = 134.205γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
MAR345data collection
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-08-02
    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