4CYL

Tomographic subvolume average of EFF-1 fusogen on extracellular vesicles


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 22.2 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: TOMOGRAPHY 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The Full-Length Cell-Cell Fusogen Eff-1 is Monomeric and Upright on the Membrane.

Zeev-Ben-Mordehai, T.Vasishtan, D.Siebert, C.A.Grunewald, K.

(2014) Nat Commun 5: 3912

  • DOI: 10.1038/ncomms4912
  • Primary Citation of Related Structures:  
    4CYL

  • PubMed Abstract: 
  • Fusogens are membrane proteins that remodel lipid bilayers to facilitate membrane merging. Although several fusogen ectodomain structures have been solved, structural information on full-length, natively membrane-anchored fusogens is scarce. Here we present the electron cryo microscopy three-dimensional reconstruction of the Caenorhabditis elegans epithelial fusion failure 1 (EFF-1) protein natively anchored in cell-derived membrane vesicles ...

    Fusogens are membrane proteins that remodel lipid bilayers to facilitate membrane merging. Although several fusogen ectodomain structures have been solved, structural information on full-length, natively membrane-anchored fusogens is scarce. Here we present the electron cryo microscopy three-dimensional reconstruction of the Caenorhabditis elegans epithelial fusion failure 1 (EFF-1) protein natively anchored in cell-derived membrane vesicles. This reveals a membrane protruding, asymmetric, elongated monomer. Flexible fitting of a protomer of the EFF-1 crystal structure, which is homologous to viral class-II fusion proteins, shows that EFF-1 has a hairpin monomeric conformation before fusion. These structural insights, when combined with our observations of membrane-merging intermediates between vesicles, enable us to propose a model for EFF-1 mediated fusion. This process, involving identical proteins on both membranes to be fused, follows a mechanism that shares features of SNARE-mediated fusion while using the structural building blocks of the unilaterally acting class-II viral fusion proteins.


    Organizational Affiliation

    Oxford Particle Imaging Centre, Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
EFF-1AA658Caenorhabditis elegansMutation(s): 0 
Gene Names: eff-1C26D10.5CELE_C26D10.5
Find proteins for G5ECA1 (Caenorhabditis elegans)
Explore G5ECA1 
Go to UniProtKB:  G5ECA1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 22.2 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: TOMOGRAPHY 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-06-04
    Type: Initial release
  • Version 1.1: 2014-07-30
    Changes: Database references
  • Version 1.2: 2017-08-23
    Changes: Data collection