4OJC

Crystal structure of the wild-type full-length trimeric ectodomain of the C. elegans fusion protein EFF-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.93 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural basis of eukaryotic cell-cell fusion

Perez-Vargas, J.Krey, T.Valansi, C.Avinoam, O.Haouz, A.Jamin, M.Raveh-Barak, H.Podbilewicz, B.Rey, F.A.

(2014) Cell 157: 407-419

  • DOI: 10.1016/j.cell.2014.02.020
  • Primary Citation of Related Structures:  4OJD, 4OJE

  • PubMed Abstract: 
  • Cell-cell fusion proteins are essential in development. Here we show that the C. elegans cell-cell fusion protein EFF-1 is structurally homologous to viral class II fusion proteins. The 2.6 Å crystal structure of the EFF-1 trimer displays the same 3D ...

    Cell-cell fusion proteins are essential in development. Here we show that the C. elegans cell-cell fusion protein EFF-1 is structurally homologous to viral class II fusion proteins. The 2.6 Å crystal structure of the EFF-1 trimer displays the same 3D fold and quaternary conformation of postfusion class II viral fusion proteins, although it lacks a nonpolar "fusion loop," indicating that it does not insert into the target membrane. EFF-1 was previously shown to be required in both cells for fusion, and we show that blocking EFF-1 trimerization blocks the fusion reaction. Together, these data suggest that whereas membrane fusion driven by viral proteins entails leveraging of a nonpolar loop, EFF-1-driven fusion of cells entails trans-trimerization such that transmembrane segments anchored in the two opposing membranes are brought into contact at the tip of the EFF-1 trimer to then, analogous to SNARE-mediated vesicle fusion, zip the two membranes into one.


    Organizational Affiliation

    Institut Pasteur, Unité de Virologie Structurale, 25-28 Rue du Docteur Roux, 75724 Paris Cedex 15, France; CNRS UMR 3569, 25-28 Rue du Docteur Roux, 75724 Paris Cedex 15, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EFF-1A
A
580Caenorhabditis elegansGene Names: eff-1
Find proteins for G5ECA1 (Caenorhabditis elegans)
Go to UniProtKB:  G5ECA1
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.93 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.220 
  • Space Group: I 21 3
Unit Cell:
Length (Å)Angle (°)
a = 173.698α = 90.00
b = 173.698β = 90.00
c = 173.698γ = 90.00
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
SHARPphasing
SCALAdata scaling
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2014-01-21 
  • Released Date: 2014-05-14 
  • Deposition Author(s): Krey, T., Rey, F.A.

Revision History 

  • Version 1.0: 2014-05-14
    Type: Initial release