1SZT

ATOMIC STRUCTURE OF A THERMOSTABLE SUBDOMAIN OF HIV-1 GP41

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 

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This is version 1.2 of the entry. See complete history. 


Literature

Atomic structure of a thermostable subdomain of HIV-1 gp41.

Tan, K., Liu, J., Wang, J., Shen, S., Lu, M.

(1997) Proc Natl Acad Sci U S A 94: 12303-12308

  • DOI: 10.1073/pnas.94.23.12303
  • Primary Citation of Related Structures:  
    1SZT

  • PubMed Abstract: 

    • Infection by HIV-1 involves the fusion of viral and cellular membranes with subsequent transfer of viral genetic material into the cell. The HIV-1 envelope glycoprotein that mediates fusion consists of the surface subunit gp120 and the transmembrane subunit gp41 ...

    Infection by HIV-1 involves the fusion of viral and cellular membranes with subsequent transfer of viral genetic material into the cell. The HIV-1 envelope glycoprotein that mediates fusion consists of the surface subunit gp120 and the transmembrane subunit gp41. gp120 directs virion attachment to the cell-surface receptors, and gp41 then promotes viral-cell membrane fusion. A soluble, alpha-helical, trimeric complex within gp41 composed of N-terminal and C-terminal extraviral segments has been proposed to represent the core of the fusion-active conformation of the HIV-1 envelope. A thermostable subdomain denoted N34(L6)C28 can be formed by the N-34 and C-28 peptides connected by a flexible linker in place of the disulfide-bonded loop region. Three-dimensional structure of N34(L6)C28 reveals that three molecules fold into a six-stranded helical bundle. Three N-terminal helices within the bundle form a central, parallel, trimeric coiled coil, whereas three C-terminal helices pack in the reverse direction into three hydrophobic grooves on the surface of the N-terminal trimer. This thermostable subdomain displays the salient features of the core structure of the isolated gp41 subunit and thus provides a possible target for therapeutics designed selectively to block HIV-1 entry.

    Related Citations: 
    • Core Structure of Gp41 from the HIV Envelope Glycoprotein
      Chan, D.C., Fass, D., Berger, J.M., Kim, P.S.
      (1997) Cell 89: 263
    • 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
    • A Trimeric Structural Domain of the HIV-1 Transmembrane Glycoprotein
      Lu, M., Blacklow, S.C., Kim, P.S.
      (1995) Nat Struct Biol 2: 1075
    Organizational Affiliation: 

    Laboratory of Immunobiology, Dana-Farber Cancer Institute, Boston, MA 02115, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HIV-1 ENVELOPE GLYCOPROTEIN GP41A68Human immunodeficiency virus 1Mutation(s): 0 
Gene Names: GP41, env
UniProt
Find proteins for Q3I1N2 (Human immunodeficiency virus 1)
Explore Q3I1N2 
Go to UniProtKB:  Q3I1N2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ3I1N2
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.07α = 90
b = 53.07β = 90
c = 60.58γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-12-24
    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