Solution Structure of HIV-1 GP41 Transmembrane Domain in Bicelles

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Tilted, Uninterrupted, Monomeric HIV-1 gp41 Transmembrane Helix from Residual Dipolar Couplings.

Chiliveri, S.C.Louis, J.M.Ghirlando, R.Baber, J.L.Bax, A.

(2018) J Am Chem Soc 140: 34-37

  • DOI: https://doi.org/10.1021/jacs.7b10245
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Cryo-electron microscopy and X-ray crystallography have shown that the pre- and postfusion states of the HIV-1 gp41 viral coat protein, although very different from one another, each adopt C 3 symmetric structures. A stable homotrimeric structure for the transmembrane domain (TM) also was modeled and supported by experimental data. For a C 3 symmetric structure, alignment in an anisotropic medium must be axially symmetric, with the unique axis of the alignment tensor coinciding with the C 3 axis. However, NMR residual dipolar couplings (RDCs) measured under three different alignment conditions were found to be incompatible with C 3 symmetry. Subsequent measurements by paramagnetic relaxation enhancement, analytical ultracentrifugation, and DEER EPR, indicate that the transmembrane domain is monomeric. 15 N NMR relaxation data and RDCs show that TM is highly ordered and uninterrupted for a total length of 32 residues, extending well into the membrane proximal external region.

  • Organizational Affiliation

    Laboratory of Chemical Physics and ‡Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health , Bethesda, Maryland 20892, United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
HIV-1 GP41 Transmembrane Domain40Human immunodeficiency virus 1Mutation(s): 0 
Gene Names: env
Membrane Entity: Yes 
Find proteins for Q74849 (Human immunodeficiency virus 1)
Explore Q74849 
Go to UniProtKB:  Q74849
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ74849
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)United StatesDK075023-08

Revision History  (Full details and data files)

  • Version 1.0: 2018-01-24
    Type: Initial release
  • Version 1.1: 2019-12-25
    Changes: Author supporting evidence, Data collection
  • Version 1.2: 2023-06-14
    Changes: Database references, Other
  • Version 1.3: 2024-05-15
    Changes: Data collection, Database references