Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: authors reported there is no experimental evidence

Macromolecule Content

• Total Structure Weight: 4650.60 
• Atom Count: 331 
• Residue Count: 40 
• Unique protein chains: 1

6B3U

Solution Structure of HIV-1 GP41 Transmembrane Domain in Bicelles

• DOI: 10.2210/pdb6B3U/pdb
• BMRB: 30349

• Classification: MEMBRANE PROTEIN
• Organism(s): Human immunodeficiency virus 1
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2017-09-24 Released: 2018-01-24 
• Deposition Author(s): Chiliveri, S.C., Louis, J.M., Ghirlando, R., Baber, J.L., Bax, A.
• Funding Organization(s): National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease 

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Experimental Data Snapshot

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

Literature

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

• PubMed: 29277995 
• DOI: 10.1021/jacs.7b10245


• 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 C3 symmetric structures. A stable homotrimeric structure for the transmembrane domain (TM) also was modeled and supported by experimental data. For a C3 symmetric structure, alignment in an anisotropic medium must be axially symmetric, with the unique axis of the alignment tensor coinciding with the C3 axis. However, NMR residual dipolar couplings (RDCs) measured under three different alignment conditions were found to be incompatible with C3 symmetry. Subsequent measurements by paramagnetic relaxation enhancement, analytical ultracentrifugation, and DEER EPR, indicate that the transmembrane domain is monomeric. 15N 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.

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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.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
HIV-1 GP41 Transmembrane Domain	A	40	Human immunodeficiency virus 1	Mutation(s): 0  Gene Names: env
Find proteins for Q74849 (Human immunodeficiency virus 1) Go to UniProtKB:  Q74849

Experimental Data & Validation

Experimental Data

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

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2017-09-24 
• Released Date: 2018-01-24 
• Deposition Author(s): Chiliveri, S.C., Louis, J.M., Ghirlando, R., Baber, J.L., Bax, A.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease	United States	DK075023-08

Revision History 

• Version 1.0: 2018-01-24
  Type: Initial release