1ZDT

The Crystal Structure of Human Steroidogenic Factor-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The crystal structures of human steroidogenic factor-1 and liver receptor homologue-1

Wang, W.Zhang, C.Marimuthu, A.Krupka, H.I.Tabrizizad, M.Shelloe, R.Mehra, U.Eng, K.Nguyen, H.Settachatgul, C.Powell, B.Milburn, M.V.West, B.L.

(2005) Proc.Natl.Acad.Sci.USA 102: 7505-7510

  • DOI: 10.1073/pnas.0409482102
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Steroidogenic factor-1 (SF-1) and liver receptor homologue-1 (LRH-1) belong to the fushi tarazu factor 1 subfamily of nuclear receptors. SF-1 is an essential factor for sex determination during development and regulates adrenal and gonadal steroidoge ...

    Steroidogenic factor-1 (SF-1) and liver receptor homologue-1 (LRH-1) belong to the fushi tarazu factor 1 subfamily of nuclear receptors. SF-1 is an essential factor for sex determination during development and regulates adrenal and gonadal steroidogenesis in the adult, whereas LRH-1 is a critical factor for development of endodermal tissues and regulates cholesterol and bile acid homeostasis. Regulatory ligands are unknown for SF-1 and LRH-1. A reported mouse LRH-1 structure revealed an empty pocket in a region commonly occupied by ligands in the structures of other nuclear receptors, and pocket-filling mutations did not alter the constitutive activity observed. Here we report the crystal structures of the putative ligand-binding domains of human SF-1 at 2.1-A resolution and human LRH-1 at 2.5-A resolution. Both structures bind a coactivator-derived peptide at the canonical activation-function surface, thus adopting the transcriptionally activating conformation. In human LRH-1, coactivator peptide binding also occurs to a second site. We discovered in both structures a phospholipid molecule bound in a pocket of the putative ligand-binding domain. MS analysis of the protein samples used for crystallization indicated that the two proteins associate with a range of phospholipids. Mutations of the pocket-lining residues reduced the transcriptional activities of SF-1 and LRH-1 in mammalian cell transfection assays without affecting their expression levels. These results suggest that human SF-1 and LRH-1 may be ligand-binding receptors, although it remains to be seen if phospholipids or possibly other molecules regulate SF-1 or LRH-1 under physiological conditions.


    Organizational Affiliation

    Plexxikon, Inc., 91 Bolivar Drive, Berkeley, CA 94710, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Steroidogenic factor 1
A, B
241Homo sapiensMutation(s): 2 
Gene Names: NR5A1 (AD4BP, FTZF1, SF1)
Find proteins for Q13285 (Homo sapiens)
Go to Gene View: NR5A1
Go to UniProtKB:  Q13285
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Nuclear receptor coactivator 2
P, Q
12Homo 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
PEF
Query on PEF

Download SDF File 
Download CCD File 
A, B
DI-PALMITOYL-3-SN-PHOSPHATIDYLETHANOLAMINE
3-[AMINOETHYLPHOSPHORYL]-[1,2-DI-PALMITOYL]-SN-GLYCEROL
C37 H74 N O8 P
SLKDGVPOSSLUAI-PGUFJCEWSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.216 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 73.601α = 90.00
b = 73.601β = 90.00
c = 195.678γ = 120.00
Software Package:
Software NamePurpose
EPMRphasing
CCP4data scaling
MOSFLMdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-05-24
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Refinement description, Version format compliance