3E8T

Crystal Structure of Epiphyas postvittana Takeout 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.142 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structure of Epiphyas postvittana takeout 1 with bound ubiquinone supports a role as ligand carriers for takeout proteins in insects

Hamiaux, C.Stanley, D.Greenwood, D.R.Baker, E.N.Newcomb, R.D.

(2009) J.Biol.Chem. 284: 3496-3503

  • DOI: 10.1074/jbc.M807467200
  • Primary Citation of Related Structures:  
  • Also Cited By: 4G0S

  • PubMed Abstract: 
  • Takeout (To) proteins are found exclusively in insects and have been proposed to have important roles in various aspects of their physiology and behavior. Limited sequence similarity with juvenile hormone-binding proteins (JHBPs), which specifically ...

    Takeout (To) proteins are found exclusively in insects and have been proposed to have important roles in various aspects of their physiology and behavior. Limited sequence similarity with juvenile hormone-binding proteins (JHBPs), which specifically bind and transport juvenile hormones in Lepidoptera, suggested a role for To proteins in binding hydrophobic ligands. We present the first crystal structure of a To protein, EpTo1 from the light brown apple moth Epiphyas postvittana, solved in-house by the single-wavelength anomalous diffraction technique using sulfur anomalous dispersion, and refined to 1.3 angstroms resolution. EpTo1 adopts the unusual alpha/beta-wrap fold, seen only for JHBP and several mammalian lipid carrier proteins, a scaffold tailored for the binding and/or transport of hydrophobic ligands. EpTo1 has a 45 angstroms long, purely hydrophobic, internal tunnel that extends for the full length of the protein and accommodates a bound ligand. The latter was shown by mass spectrometry to be ubiquinone-8 and is probably derived from Escherichia coli. The structure provides the first direct experimental evidence that To proteins are ligand carriers; gives insights into the nature of endogenous ligand(s) of EpTo1; shows, by comparison with JHBP, a basis for different ligand specificities; and suggests a mechanism for the binding/release of ligands.


    Organizational Affiliation

    The Horticulture and Food Research Institute of New Zealand Limited (HortResearch), Private Bag 92169, Auckland 1142, New Zealand.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Takeout-like protein 1
A
220Epiphyas postvittanaMutation(s): 0 
Find proteins for B5ABT1 (Epiphyas postvittana)
Go to UniProtKB:  B5ABT1
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
UQ8
Query on UQ8

Download SDF File 
Download CCD File 
A
Ubiquinone-8
2,3-dimethoxy-5-methyl-6-[(6E,10E,14E,18E,22E,26E)-3,7,11,15,19,23,27,31-octamethyldotriaconta-2,6,10,14,18,22,26,30-octaen-1-yl]cyclohexa-2,5-diene-1,4-dione
C49 H74 O4
ICFIZJQGJAJRSU-SGHXUWJISA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.142 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 45.454α = 90.00
b = 45.178β = 108.84
c = 53.778γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
REFMACrefinement
SHARPphasing
SCALAdata scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-12-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance