1ENV

ATOMIC STRUCTURE OF THE ECTODOMAIN FROM HIV-1 GP41


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.244 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Atomic structure of the ectodomain from HIV-1 gp41.

Weissenhorn, W.Dessen, A.Harrison, S.C.Skehel, J.J.Wiley, D.C.

(1997) Nature 387: 426-430

  • DOI: 10.1038/387426a0
  • Primary Citation of Related Structures:  
    1ENV

  • PubMed Abstract: 
  • Fusion of viral and cellular membranes by the envelope glycoprotein gp120/gp41 effects entry of HIV-1 into the cell. The precursor, gp160, is cleaved post-translationally into gp120 and gp41 which remain non-covalently associated. Binding to both CD4 and a co-receptor leads to the conformational changes in gp120/gp41 needed for membrane fusion ...

    Fusion of viral and cellular membranes by the envelope glycoprotein gp120/gp41 effects entry of HIV-1 into the cell. The precursor, gp160, is cleaved post-translationally into gp120 and gp41 which remain non-covalently associated. Binding to both CD4 and a co-receptor leads to the conformational changes in gp120/gp41 needed for membrane fusion. We used X-ray crystallography to determine the structure of the protease-resistant part of a gp41 ectodomain solubilized with a trimeric GCN4 coiled coil in place of the amino-terminal fusion peptide. The core of the molecule is found to be an extended, triple-stranded alpha-helical coiled coil with the amino terminus at its tip. A carboxy-terminal alpha-helix packs in the reverse direction against the outside of the coiled coil, placing the amino and carboxy termini near each other at one end of the long rod. These features, and the existence of a similar reversal of chain direction in the fusion pH-induced conformation of influenza virus HA2 and in the transmembrane subunit of Moloney murine leukaemia virus (Fig. 1a-d), suggest a common mechanism for initiating fusion.


    Organizational Affiliation

    Laboratory of Molecular Medicine, The Children's Hospital, Boston, Massachusetts 02215, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HIV-1 ENVELOPE PROTEIN CHIMERA CONSISTING OF A FRAGMENT OF GCN4 ZIPPER CLONED N-TERMINAL TO TWO FRAGMENTS OF GP41A123Saccharomyces cerevisiaeHuman immunodeficiency virus 1Mutation(s): 8 
Gene Names: GCN4AAS3ARG9YEL009Cenv
UniProt
Find proteins for P03377 (Human immunodeficiency virus type 1 group M subtype B (isolate BRU/LAI))
Explore P03377 
Go to UniProtKB:  P03377
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.244 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.35α = 90
b = 52.35β = 90
c = 414.6γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-11-19
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-06-28
    Changes: Database references, Other, Source and taxonomy, Structure summary