1QR8

INHIBITION OF HIV-1 INFECTIVITY BY THE GP41 CORE: ROLE OF A CONSERVED HYDROPHOBIC CAVITY IN MEMBRANE FUSION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.212 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Inhibition of human immunodeficiency virus type 1 infectivity by the gp41 core: role of a conserved hydrophobic cavity in membrane fusion.

Ji, H.Shu, W.Burling, F.T.Jiang, S.Lu, M.

(1999) J.Virol. 73: 8578-8586

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The gp41 envelope protein of human immunodeficiency virus type 1 (HIV-1) contains an alpha-helical core structure responsible for mediating membrane fusion during viral entry. Recent studies suggest that a conserved hydrophobic cavity in the coiled c ...

    The gp41 envelope protein of human immunodeficiency virus type 1 (HIV-1) contains an alpha-helical core structure responsible for mediating membrane fusion during viral entry. Recent studies suggest that a conserved hydrophobic cavity in the coiled coil of this core plays a distinctive structural role in maintaining the fusogenic conformation of the gp41 molecule. Here we investigated the importance of this cavity in determining the structure and biological activity of the gp41 core by using the N34(L6)C28 model. The high-resolution crystal structures of N34(L6)C28 of two HIV-1 gp41 fusion-defective mutants reveal that each mutant sequence is accommodated in the six-helix bundle structure by forming the cavity with different sets of atoms. Remarkably, the mutant N34(L6)C28 cores are highly effective inhibitors of HIV-1 infection, with 5- to 16-fold greater activity than the wild-type molecule. The enhanced inhibitory activity by fusion-defective mutations correlates with local structural perturbations close to the cavity that destabilize the six-helix bundle. Taken together, these results indicate that the conserved hydrophobic coiled-coil cavity in the gp41 core is critical for HIV-1 entry and its inhibition and provides a potential antiviral drug target.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GP41 ENVELOPE PROTEIN
A
68Human immunodeficiency virus 1Mutation(s): 0 
Gene Names: HIV1 ENV
Find proteins for Q76270 (Human immunodeficiency virus 1)
Go to UniProtKB:  Q76270
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.212 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 53.587α = 90.00
b = 53.587β = 90.00
c = 59.558γ = 120.00
Software Package:
Software NamePurpose
X-PLORrefinement
AMoREphasing
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-11-26
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2011-11-16
    Type: Atomic model