DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Full scale structural, mechanical and dynamical properties of HIV-1 liposomes

Journal Article · · PLoS Computational Biology (Online)

Enveloped viruses are enclosed by a lipid membrane inside of which are all of the components necessary for the virus life cycle; viral proteins, the viral genome and metabolites. Viral envelopes are lipid bilayers that adopt morphologies ranging from spheres to tubes. The envelope is derived from the host cell during viral replication. Thus, the composition of the bilayer depends on the complex constitution of lipids from the host-cell’s organelle(s) where assembly and/or budding of the viral particle occurs. Here, molecular dynamics (MD) simulations of authentic, asymmetric HIV-1 liposomes are used to derive a unique level of resolution of its full-scale structure, mechanics and dynamics. Analysis of the structural properties reveal the distribution of thicknesses of the bilayers over the entire liposome as well as its global fluctuations. Moreover, full-scale mechanical analyses are employed to derive the global bending rigidity of HIV-1 liposomes. Finally, dynamical properties of the lipid molecules reveal important relationships between their 3D diffusion, the location of lipid-rafts and the asymmetrical composition of the envelope. Overall, our simulations reveal complex relationships between the rich lipid composition of the HIV-1 liposome and its structural, mechanical and dynamical properties with critical consequences to different stages of HIV-1’s life cycle.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
National Institutes of Health (NIH); National Science Foundation (NSF); USDOE
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1842538
Report Number(s):
LA-UR-21-23831; 10.1371/journal.pcbi.1009781
Journal Information:
PLoS Computational Biology (Online), Journal Name: PLoS Computational Biology (Online) Journal Issue: 1 Vol. 18; ISSN 1553-7358
Publisher:
Public Library of Science (PLoS)Copyright Statement
Country of Publication:
United States
Language:
English

References (68)

PACKMOL: A package for building initial configurations for molecular dynamics simulations journal October 2009
MDAnalysis: A toolkit for the analysis of molecular dynamics simulations journal April 2011
Cellular proteins detected in HIV-1 journal January 2008
VMD: Visual molecular dynamics journal February 1996
Pretransitional Effects in Dimyristoylphosphatidylcholine Vesicle Membranes: Optical Dynamometry Study journal July 2000
Lipid lateral diffusion and membrane heterogeneity journal January 2009
A New Computational Method for Membrane Compressibility: Bilayer Mechanical Thickness Revisited journal February 2019
Area Compressibility Moduli of the Monolayer Leaflets of Asymmetric Bilayers from Simulations journal September 2019
Three-dimensional Structure of HIV-1 Virus-like Particles by Electron Cryotomography journal February 2005
HIV-1 Envelope Glycoprotein Biosynthesis, Trafficking, and Incorporation journal July 2011
Mechanisms of PI(4,5)P2 Enrichment in HIV-1 Viral Membranes journal September 2020
Molecular dynamics simulations of large macromolecular complexes journal April 2015
GROMACS: High performance molecular simulations through multi-level parallelism from laptops to supercomputers journal September 2015
Nothing to Sneeze At: A Dynamic and Integrative Computational Model of an Influenza A Virion journal March 2015
The Role of the Membrane in the Structure and Biophysical Robustness of the Dengue Virion Envelope journal March 2016
Molecular Mechanism of HIV-1 Entry journal October 2019
Depletion of cellular cholesterol inhibits membrane binding and higher-order multimerization of human immunodeficiency virus type 1 Gag journal March 2007
Lipids and membrane microdomains in HIV-1 replication journal August 2009
Virus assembly and plasma membrane domains: Which came first? journal February 2013
Computational Modeling of Realistic Cell Membranes journal January 2019
High-Performance Analysis of Biomolecular Containers to Measure Small-Molecule Transport, Transbilayer Lipid Diffusion, and Protein Cavities journal September 2019
CHARMM-GUI Martini Maker for Coarse-Grained Simulations with the Martini Force Field journal August 2015
Cholesterol Flip-Flop in Heterogeneous Membranes journal January 2019
Molecular Dynamics Simulations Reveal Leaflet Coupling in Compositionally Asymmetric Phase-Separated Lipid Membranes journal April 2019
Determining Structural and Mechanical Properties from Molecular Dynamics Simulations of Lipid Vesicles journal August 2014
Alchembed: A Computational Method for Incorporating Multiple Proteins into Complex Lipid Geometries journal May 2015
The MARTINI Coarse-Grained Force Field: Extension to Proteins journal April 2008
The Molecular Structure of the Liquid-Ordered Phase of Lipid Bilayers journal January 2014
Membrane curvature and mechanisms of dynamic cell membrane remodelling journal November 2005
HIV gp41–mediated membrane fusion occurs at edges of cholesterol-rich lipid domains journal April 2015
Membrane lipids: where they are and how they behave journal February 2008
HIV-1 assembly, release and maturation journal June 2015
HIV-1 capsid: the multifaceted key player in HIV-1 infection journal July 2015
Viral membrane fusion journal July 2008
Envelope glycoprotein mobility on HIV-1 particles depends on the virus maturation state journal September 2017
A lipid-based partitioning mechanism for selective incorporation of proteins into membranes of HIV particles journal April 2019
Antibody responses to viral infections: a structural perspective across three different enveloped viruses journal March 2019
Lipid rafts come of age journal April 2020
Array programming with NumPy journal September 2020
Plasma membranes are asymmetric in lipid unsaturation, packing and protein shape journal May 2020
SciPy 1.0: fundamental algorithms for scientific computing in Python journal February 2020
Cholesterol enhances influenza binding avidity by controlling nanoscale receptor clustering journal January 2018
Size distributions of vesicles : the role of the effective rigidity of membranes journal January 1986
Thermal fluctuations and bending rigidity of bilayer membranes journal September 2013
Phosphatidylinositol (4,5) bisphosphate regulates HIV-1 Gag targeting to the plasma membrane journal October 2004
The HIV lipidome: A raft with an unusual composition journal February 2006
Direct imaging of liquid domains in membranes by cryo-electron tomography journal August 2020
Plasma membrane rafts play a critical role in HIV-1 assembly and release journal November 2001
The host-cell restriction factor SERINC5 restricts HIV-1 infectivity without altering the lipid composition and organization of viral particles journal August 2017
Volume, Shape, and Roundness of Quartz Particles journal April 1935
Effect of the HIV-1 fusion peptide on the mechanical properties and leaflet coupling of lipid bilayers journal February 2011
Anomalous Diffusion of Phospholipids and Cholesterols in a Lipid Bilayer and its Origins journal October 2012
Nonadditive Compositional Curvature Energetics of Lipid Bilayers journal September 2016
Matplotlib: A 2D Graphics Environment journal January 2007
Scalable Analysis of Authentic Viral Envelopes on FRONTERA journal November 2020
Comparative lipidomics analysis of HIV-1 particles and their producer cell membrane in different cell lines: Lipidomics of HIV-1 particles and producer plasma membranes journal January 2013
Cellular Proteins Bound to Immunodeficiency Viruses: Implications for Pathogenesis and Vaccines journal December 1992
Expanded HIV-1 Cellular Tropism by Phenotypic Mixing with Murine Endogenous Retroviruses journal February 1990
Role for Human Immunodeficiency Virus Type 1 Membrane Cholesterol in Viral Internalization journal October 2002
Virus Entry, Assembly, Budding, and Membrane Rafts journal June 2003
Virion stiffness regulates immature HIV-1 entry journal January 2013
A Stiffness Switch in Human Immunodeficiency Virus journal March 2007
HIV-1 Fusion Peptide Decreases Bending Energy and Promotes Curved Fusion Intermediates journal September 2007
MDAnalysis: A Python Package for the Rapid Analysis of Molecular Dynamics Simulations conference January 2016
Host Lipids in Positive-Strand RNA Virus Genome Replication journal February 2019
The Interplay between HIV-1 Gag Binding to the Plasma Membrane and Env Incorporation journal May 2020
Synchronized HIV assembly by tunable PIP2 changes reveals PIP2 requirement for stable Gag anchoring journal June 2017
Binding mechanism of the matrix domain of HIV-1 gag on lipid membranes journal August 2020