4OJD

Crystal structure of a C-terminally truncated trimeric ectodomain of the C. elegans fusion protein EFF-1 G260A/D321E/D322E mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.26 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.199 

wwPDB Validation 3D Report Full Report



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
  • Structures With Same Primary Citation

  • 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. Electronic address: rey@pasteur.fr.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EFF-1AH526Caenorhabditis elegansMutation(s): 3 
Gene Names: C26D10.5CELE_C26D10.5eff-1
Find proteins for G5ECA1 (Caenorhabditis elegans)
Explore G5ECA1 
Go to UniProtKB:  G5ECA1
Protein Feature View
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  • Reference Sequence
Oligosaccharides
Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
A
3 N-Glycosylation
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download CCD File 
H
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.26 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.199 
  • Space Group: P 21 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 132.443α = 90
b = 132.443β = 90
c = 132.443γ = 90
Software Package:
Software NamePurpose
XDSdata scaling
PHASERphasing
BUSTERrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

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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
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Structure summary