1ENV

ATOMIC STRUCTURE OF THE ECTODOMAIN FROM HIV-1 GP41


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.277 
  • R-Value Work: 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

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HIV-1 ENVELOPE PROTEIN CHIMERA CONSISTING OF A FRAGMENT OF GCN4 ZIPPER CLONED N-TERMINAL TO TWO FRAGMENTS OF GP41
A
123Human immunodeficiency virus type 1 group M subtype BGene Names: env
Find proteins for P03377 (Human immunodeficiency virus type 1 group M subtype B)
Go to UniProtKB:  P03377
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.244 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 52.350α = 90.00
b = 52.350β = 90.00
c = 414.600γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
X-PLORmodel building
SCALEPACKdata scaling
X-PLORphasing
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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