2QDI

Drosophila OBP LUSH D118A mutation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Activation of pheromone-sensitive neurons is mediated by conformational activation of pheromone-binding protein.

Laughlin, J.D.Ha, T.S.Jones, D.N.Smith, D.P.

(2008) Cell 133: 1255-1265

  • DOI: 10.1016/j.cell.2008.04.046
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Detection of volatile odorants by olfactory neurons is thought to result from direct activation of seven-transmembrane odorant receptors by odor molecules. Here, we show that detection of the Drosophila pheromone, 11-cis vaccenyl acetate (cVA), is in ...

    Detection of volatile odorants by olfactory neurons is thought to result from direct activation of seven-transmembrane odorant receptors by odor molecules. Here, we show that detection of the Drosophila pheromone, 11-cis vaccenyl acetate (cVA), is instead mediated by pheromone-induced conformational shifts in the extracellular pheromone-binding protein, LUSH. We show that LUSH undergoes a pheromone-specific conformational change that triggers the firing of pheromone-sensitive neurons. Amino acid substitutions in LUSH that are predicted to reduce or enhance the conformational shift alter sensitivity to cVA as predicted in vivo. One substitution, LUSH(D118A), produces a dominant-active LUSH protein that stimulates T1 neurons through the neuronal receptor components Or67d and SNMP in the complete absence of pheromone. Structural analysis of LUSH(D118A) reveals that it closely resembles cVA-bound LUSH. Therefore, the pheromone-binding protein is an inactive, extracellular ligand converted by pheromone molecules into an activator of pheromone-sensitive neurons and reveals a distinct paradigm for detection of odorants.


    Organizational Affiliation

    Department of Pharmacology, University of Colorado at Denver and Health Sciences Center, 12801 East 17th Avenue, M/S 8303, P.O. Box 6511, Aurora CO 80045.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
General odorant-binding protein lush
A, B
124Drosophila melanogasterMutation(s): 1 
Gene Names: lush (Obp76a, Obp76c)
Find proteins for O02372 (Drosophila melanogaster)
Go to UniProtKB:  O02372
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PGE
Query on PGE

Download SDF File 
Download CCD File 
A, B
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.213 
  • Space Group: P 43
Unit Cell:
Length (Å)Angle (°)
a = 46.805α = 90.00
b = 46.805β = 90.00
c = 109.757γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
d*TREKdata reduction
d*TREKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
Blu-Icedata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-06-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance