4PLD

Human Nuclear Receptor Liver Receptor Homologue-1, LRH-1, in its apo State Bound to a Fragment of Human TIF-2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Unexpected Allosteric Network Contributes to LRH-1 Co-regulator Selectivity.

Musille, P.M.Kossmann, B.R.Kohn, J.A.Ivanov, I.Ortlund, E.A.

(2016) J.Biol.Chem. 291: 1411-1426

  • DOI: 10.1074/jbc.M115.662874
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Phospholipids (PLs) are unusual signaling hormones sensed by the nuclear receptor liver receptor homolog-1 (LRH-1), which has evolved a novel allosteric pathway to support appropriate interaction with co-regulators depending on ligand status. LRH-1 p ...

    Phospholipids (PLs) are unusual signaling hormones sensed by the nuclear receptor liver receptor homolog-1 (LRH-1), which has evolved a novel allosteric pathway to support appropriate interaction with co-regulators depending on ligand status. LRH-1 plays an important role in controlling lipid and cholesterol homeostasis and is a potential target for the treatment of metabolic and neoplastic diseases. Although the prospect of modulating LRH-1 via small molecules is exciting, the molecular mechanism linking PL structure to transcriptional co-regulator preference is unknown. Previous studies showed that binding to an activating PL ligand, such as dilauroylphosphatidylcholine, favors LRH-1's interaction with transcriptional co-activators to up-regulate gene expression. Both crystallographic and solution-based structural studies showed that dilauroylphosphatidylcholine binding drives unanticipated structural fluctuations outside of the canonical activation surface in an alternate activation function (AF) region, encompassing the β-sheet-H6 region of the protein. However, the mechanism by which dynamics in the alternate AF influences co-regulator selectivity remains elusive. Here, we pair x-ray crystallography with molecular modeling to identify an unexpected allosteric network that traverses the protein ligand binding pocket and links these two elements to dictate selectivity. We show that communication between the alternate AF region and classical AF2 is correlated with the strength of the co-regulator interaction. This work offers the first glimpse into the conformational dynamics that drive this unusual PL-mediated nuclear hormone receptor activation.


    Organizational Affiliation

    From the Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia 30322 and.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nuclear receptor subfamily 5 group A member 2
A
245Homo sapiensMutation(s): 0 
Gene Names: NR5A2 (B1F, CPF, FTF)
Find proteins for O00482 (Homo sapiens)
Go to Gene View: NR5A2
Go to UniProtKB:  O00482
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Nuclear receptor coactivator 2
B
14Homo sapiensMutation(s): 0 
Gene Names: NCOA2 (BHLHE75, SRC2, TIF2)
Find proteins for Q15596 (Homo sapiens)
Go to Gene View: NCOA2
Go to UniProtKB:  Q15596
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CPS
Query on CPS

Download SDF File 
Download CCD File 
A
3-[(3-CHOLAMIDOPROPYL)DIMETHYLAMMONIO]-1-PROPANESULFONATE
CHAPS
C32 H58 N2 O7 S
UMCMPZBLKLEWAF-BCTGSCMUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.187 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 45.813α = 90.00
b = 65.681β = 90.00
c = 83.482γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
Cootmodel building
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-12-16
    Type: Initial release
  • Version 1.1: 2016-01-27
    Type: Database references
  • Version 1.2: 2017-11-22
    Type: Database references, Derived calculations, Refinement description