3GWO

Structure of the C-terminal Domain of a Putative HIV-1 gp41 Fusion Intermediate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.232 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Role of a putative gp41 dimerization domain in human immunodeficiency virus type 1 membrane fusion.

Liu, J.Deng, Y.Li, Q.Dey, A.K.Moore, J.P.Lu, M.

(2010) J.Virol. 84: 201-209

  • DOI: 10.1128/JVI.01558-09
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The entry of human immunodeficiency virus type 1 (HIV-1) into a target cell entails a series of conformational changes in the gp41 transmembrane glycoprotein that mediates the fusion of the viral and target cell membranes. A trimer-of-hairpins struct ...

    The entry of human immunodeficiency virus type 1 (HIV-1) into a target cell entails a series of conformational changes in the gp41 transmembrane glycoprotein that mediates the fusion of the viral and target cell membranes. A trimer-of-hairpins structure formed by the association of two heptad repeat (HR) regions of the gp41 ectodomain has been implicated in a late step of the fusion pathway. Earlier native and intermediate states of the protein are postulated to mediate the antiviral activity of the fusion inhibitor enfuvirtide and of broadly neutralizing monoclonal antibodies (NAbs), but the details of these structures remain unknown. Here, we report the identification and crystal structure of a dimerization domain in the C-terminal ectodomain of gp41 (residues 630 to 683, or C54). Two C54 monomers associate to form an asymmetric, antiparallel coiled coil with two distinct C-terminal alpha-helical overhangs. This dimer structure is conferred largely by interactions within a central core that corresponds to the sequence of enfuvirtide. The mutagenic alteration of the dimer interface severely impairs the infectivity of Env-pseudotyped viruses. Moreover, the C54 structure binds tightly to both the 2F5 and 4E10 NAbs and likely represents a potential intermediate conformation of gp41. These results should enhance our understanding of the molecular basis of the gp41 fusogenic structural transitions and thereby guide rational, structure-based efforts to design new fusion inhibitors and vaccine candidates intended to induce broadly neutralizing antibodies.


    Organizational Affiliation

    Weill Medical College of Cornell University, Department of Biochemistry , New York, NY 10021, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Envelope glycoprotein gp160
A, B
54Human immunodeficiency virus type 1 group M subtype B (isolate LW123)Mutation(s): 0 
Gene Names: env
Find proteins for Q70626 (Human immunodeficiency virus type 1 group M subtype B (isolate LW123))
Go to UniProtKB:  Q70626
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
JEF
Query on JEF

Download SDF File 
Download CCD File 
A
O-(O-(2-AMINOPROPYL)-O'-(2-METHOXYETHYL)POLYPROPYLENE GLYCOL 500)
JEFFAMINE
C30 H63 N O10
ICCXIDTYQFYPNV-RUMGZKRTSA-N
 Ligand Interaction
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.232 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 33.957α = 90.00
b = 33.957β = 90.00
c = 174.838γ = 120.00
Software Package:
Software NamePurpose
SOLVEphasing
ADSCdata collection
DENZOdata reduction
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2009-04-01 
  • Released Date: 2009-12-15 
  • Deposition Author(s): Liu, J.

Revision History 

  • Version 1.0: 2009-12-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Non-polymer description, Version format compliance
  • Version 1.2: 2013-06-19
    Type: Database references