1QR9

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: 1.60 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.202 

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

  • DOI: 10.1128/JVI.73.10.8578-8586.1999
  • Primary Citation of Related Structures:  
    1QR8, 1QR9

  • 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 coil of this core plays a distinctive structural role in maintaining the fusogenic conformation of the gp41 molecule ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GP41 ENVELOPE PROTEINA68Human immunodeficiency virus 1Mutation(s): 0 
Gene Names: HIV1 ENV
UniProt
Find proteins for Q76270 (Human immunodeficiency virus 1)
Explore Q76270 
Go to UniProtKB:  Q76270
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.202 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.675α = 90
b = 49.675β = 90
c = 60.195γ = 120
Software Package:
Software NamePurpose
AMoREphasing
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

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