ArticleBiochimica et biophysica acta2014
Characterization of the water defect at the HIV-1 gp41 membrane spanning domain in bilayers with and without cholesterol using molecular simulations.
Article in Biochimica et biophysica acta, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 19 citations in OpenAlex.
- Article
- Tracking the protein conformational motions driving HIV-1 membrane fusion.Scientific reports · 2026Article
- Interactions of HIV gp41's membrane-proximal external region and transmembrane domain with phospholipid membranes fromBiochimica et biophysica acta. Biomembranes · 2021Article
- Viral Membrane Fusion and the Transmembrane Domain.Viruses · 2020Review
- Influence of interfacial tryptophan residues on an arginine-flanked transmembrane helix.Biochimica et biophysica acta. Biomembranes · 2020Article
- Influence of Lipid Saturation, Hydrophobic Length and Cholesterol on Double-Arginine-Containing Helical Peptides in Bilayer Membranes.Chembiochem : a European journal of chemical biology · 2019Article
- Emerging Diversity in Lipid-Protein Interactions.Chemical reviews · 2019Review
- Characterization of Lipid-Protein Interactions and Lipid-Mediated Modulation of Membrane Protein Function through Molecular Simulation.Chemical reviews · 2019Review
- All-atom virus simulations.Current opinion in virology · 2018Review
- HIV-1 Env gp41 Transmembrane Domain Dynamics Are Modulated by Lipid, Water, and Ion Interactions.Biophysical journal · 2018Article
- All-Atom Structural Models of the Transmembrane Domains of Insulin and Type 1 Insulin-Like Growth Factor Receptors.Frontiers in endocrinology · 2016Article
- The Atomic Structure of the HIV-1 gp41 Transmembrane Domain and Its Connection to the Immunogenic Membrane-proximal External Region.The Journal of biological chemistry · 2015Article
- Assembly of Influenza Hemagglutinin Fusion Peptides in a Phospholipid Bilayer by Coarse-grained Computer Simulations.Frontiers in molecular biosciences · 2015Article
- Dynamics of lipids, cholesterol, and transmembrane α-helices from microsecond molecular dynamics simulations.The journal of physical chemistry. B · 2014Article
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Authors and funding
3 authors at 1 institution in 1 country.
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Abstract
The membrane spanning domain (MSD) of human immunodeficiency virus 1 (HIV-1) envelope glycoprotein gp41 is important for fusion and infection. We used molecular dynamics (MD) simulations (3.4 μs total) to relate membrane and peptide properties that lead to water solvation of the α-helical gp41 MSD's midspan arginine in pure dipalmitoylphosphatidylcholine (DPPC) and in 50/50 DPPC/cholesterol membranes. We find that the midspan arginine is solvated by water that penetrates the inner leaflet, leading to a so-called water defect. The water defect is surprisingly robust across initial conditions and membrane compositions, but the presence of cholesterol modulates its behavior in several key ways. In the cholesterol-containing membranes, fluctuations in membrane thickness and water penetration depth are localized near the midspan arginine, and the MSD helices display a tightly regulated tilt angle. In the cholesterol-free membranes, thickness fluctuations are not as strongly correlated to the peptide position and tilt angles vary significantly depending on protein position relative to boundaries between domains of differing thickness. Cholesterol in an HIV-1 viral membrane is required for infection. Therefore, this work suggests that the colocalized water defect and membrane thickness fluctuations in cholesterol-containing viral membranes play an important role in fusion by bringing the membrane closer to a stability limit that must be crossed for fusion to occur.
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