Structure of gp41-M-MAT, a membrane associated MPER trimer from HIV-1 gp41.

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 400 
  • Conformers Submitted: 11 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Structure of an HIV-1-neutralizing antibody target, the lipid-bound gp41 envelope membrane proximal region trimer.

Reardon, P.N.Sage, H.Dennison, S.M.Martin, J.W.Donald, B.R.Alam, S.M.Haynes, B.F.Spicer, L.D.

(2014) Proc Natl Acad Sci U S A 111: 1391-1396

  • DOI: https://doi.org/10.1073/pnas.1309842111
  • Primary Citation of Related Structures:  
    2LP7, 2M7W

  • PubMed Abstract: 

    The membrane proximal external region (MPER) of HIV-1 glycoprotein (gp) 41 is involved in viral-host cell membrane fusion. It contains short amino acid sequences that are binding sites for the HIV-1 broadly neutralizing antibodies 2F5, 4E10, and 10E8, making these binding sites important targets for HIV-1 vaccine development. We report a high-resolution structure of a designed MPER trimer assembled on a detergent micelle. The NMR solution structure of this trimeric domain, designated gp41-M-MAT, shows that the three MPER peptides each adopt symmetric α-helical conformations exposing the amino acid side chains of the antibody binding sites. The helices are closely associated at their N termini, bend between the 2F5 and 4E10 epitopes, and gradually separate toward the C termini, where they associate with the membrane. The mAbs 2F5 and 4E10 bind gp41-M-MAT with nanomolar affinities, consistent with the substantial exposure of their respective epitopes in the trimer structure. The traditional structure determination of gp41-M-MAT using the Xplor-NIH protocol was validated by independently determining the structure using the DISCO sparse-data protocol, which exploits geometric arrangement algorithms that guarantee to compute all structures and assignments that satisfy the data.

  • Organizational Affiliation

    Department of Biochemistry, Duke Human Vaccine Institute, Duke Department of Medicine, and Department of Radiology, Duke University School of Medicine, Durham, NC 27710.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Envelope glycoprotein
A, B, C
59Human immunodeficiency virus 1Mutation(s): 0 
Find proteins for M1E1E4 (Human immunodeficiency virus 1)
Explore M1E1E4 
Go to UniProtKB:  M1E1E4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupM1E1E4
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 400 
  • Conformers Submitted: 11 
  • Selection Criteria: structures with the least restraint violations 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-02-06
    Type: Initial release
  • Version 1.1: 2014-01-15
    Changes: Database references
  • Version 1.2: 2014-03-05
    Changes: Database references
  • Version 1.3: 2023-06-14
    Changes: Data collection, Database references, Other
  • Version 1.4: 2024-05-15
    Changes: Data collection, Database references