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Denieva Z, Kuzmin PI, Galimzyanov TR, Datta SAK, Rein A, Batishchev OV. Human Immunodeficiency Virus Type 1 Gag Polyprotein Modulates Membrane Physical Properties like a Surfactant: Potential Implications for Virus Assembly. ACS Infect Dis 2024; 10:2870-2885. [PMID: 38917054 PMCID: PMC11320576 DOI: 10.1021/acsinfecdis.4c00251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 06/17/2024] [Accepted: 06/18/2024] [Indexed: 06/27/2024]
Abstract
Human immunodeficiency virus (HIV) assembly at an infected cell's plasma membrane requires membrane deformation to organize the near-spherical shape of an immature virus. While the cellular expression of HIV Gag is sufficient to initiate budding of virus-like particles, how Gag generates membrane curvature is not fully understood. Using highly curved lipid nanotubes, we have investigated the physicochemical basis of the membrane activity of recombinant nonmyristoylated Gag-Δp6. Gag protein, upon adsorption onto the membrane, resulted in the shape changes of both charged and uncharged nanotubes. This shape change was more pronounced in the presence of charged lipids, especially phosphatidylinositol bisphosphate (PI(4,5)P2). We found that Gag modified the interfacial tension of phospholipid bilayer membranes, as judged by comparison with the effects of amphipathic peptides and nonionic detergent. Bioinformatic analysis demonstrated that a region of the capsid and SP1 domains junction of Gag is structurally similar to the amphipathic peptide magainin-1. This region accounts for integral changes in the physical properties of the membrane upon Gag adsorption, as we showed with the synthetic CA-SP1 junction peptide. Phenomenologically, membrane-adsorbed Gag could diminish the energetic cost of increasing the membrane area in a way similar to foam formation. We propose that Gag acts as a surface-active substance at the HIV budding site that softens the membrane at the place of Gag adsorption, lowering the energy for membrane bending. Finally, our experimental data and theoretical considerations give a lipid-centric view and common mechanism by which proteins could bend membranes, despite not having intrinsic curvature in their molecular surfaces or assemblies.
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Affiliation(s)
- Zaret
G. Denieva
- A.N.
Frumkin Institute of Physical Chemistry and Electrochemistry, RAS, Leninsky pr., 31, bld. 4, 119071 Moscow, Russia
| | - Peter I. Kuzmin
- A.N.
Frumkin Institute of Physical Chemistry and Electrochemistry, RAS, Leninsky pr., 31, bld. 4, 119071 Moscow, Russia
| | - Timur R. Galimzyanov
- A.N.
Frumkin Institute of Physical Chemistry and Electrochemistry, RAS, Leninsky pr., 31, bld. 4, 119071 Moscow, Russia
| | - Siddhartha A. K. Datta
- Retroviral
Assembly Section, HIV Dynamics and Replication Program, Center for
Cancer Research, National Cancer Institute,
National Institutes of Health, Frederick, Maryland 21702-1201, United States
| | - Alan Rein
- Retroviral
Assembly Section, HIV Dynamics and Replication Program, Center for
Cancer Research, National Cancer Institute,
National Institutes of Health, Frederick, Maryland 21702-1201, United States
| | - Oleg V. Batishchev
- A.N.
Frumkin Institute of Physical Chemistry and Electrochemistry, RAS, Leninsky pr., 31, bld. 4, 119071 Moscow, Russia
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Wang Y, Zhang J, Gao H, Sun Y, Wang L. Lipid nanotubes: Formation and applications. Colloids Surf B Biointerfaces 2022; 212:112362. [PMID: 35101821 DOI: 10.1016/j.colsurfb.2022.112362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 01/18/2022] [Accepted: 01/22/2022] [Indexed: 10/19/2022]
Abstract
Lipids, the fundamental components of cell membrane, play important roles in the whole cycle of cell life, thus attracting worldwide attention, owing to their physicochemical property and extensive use in the applications based on lipid assemblies. Compared with liposomes, lipid nanotubes (LNTs) usually possess unique properties, such as highly ordered structure, precise molecular recognition, and the possibility of substance transport, thus providing more potential applications in different research fields. However, until now, there are still quite rare cases of LNTs successfully employed in practical applications. Bearing this in mind and based on our own experience in this field, we summarized and discussed the recent progress of the fabrication approaches and representative applications of the LNTs in the past decade, which would potentially provide basic understanding and guidance towards their future development.
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Affiliation(s)
- Yiqing Wang
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China; State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266237, China
| | - Jinwei Zhang
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266237, China
| | - Haiping Gao
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266237, China.
| | - Yuan Sun
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266237, China; Center of Pharmaceutical Engineering and Technology, Harbin University of Commerce, Harbin 150076, China.
| | - Lei Wang
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China.
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Alimohamadi H, Ovryn B, Rangamani P. Modeling membrane nanotube morphology: the role of heterogeneity in composition and material properties. Sci Rep 2020; 10:2527. [PMID: 32054874 PMCID: PMC7018976 DOI: 10.1038/s41598-020-59221-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 01/27/2020] [Indexed: 01/14/2023] Open
Abstract
Membrane nanotubes are dynamic structures that may connect cells over long distances. Nanotubes are typically thin cylindrical tubes, but they may occasionally have a beaded architecture along the tube. In this paper, we study the role of membrane mechanics in governing the architecture of these tubes and show that the formation of bead-like structures along the nanotubes can result from local heterogeneities in the membrane either due to protein aggregation or due to membrane composition. We present numerical results that predict how membrane properties, protein density, and local tension compete to create a phase space that governs the morphology of a nanotube. We also find that there exists a discontinuity in the energy that impedes two beads from fusing. These results suggest that the membrane-protein interaction, membrane composition, and membrane tension closely govern the tube radius, number of beads, and the bead morphology.
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Affiliation(s)
- Haleh Alimohamadi
- Department of Mechanical and Aerospace Engineering, University of California San Diego, San Diego, CA, 92093, USA
| | - Ben Ovryn
- Department of Physics, New York Institute of Technology, New York, NY, 11568, USA
| | - Padmini Rangamani
- Department of Mechanical and Aerospace Engineering, University of California San Diego, San Diego, CA, 92093, USA.
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Najafinobar N, Mellander LJ, Kurczy ME, Dunevall J, Angerer TB, Fletcher JS, Cans AS. Cholesterol Alters the Dynamics of Release in Protein Independent Cell Models for Exocytosis. Sci Rep 2016; 6:33702. [PMID: 27650365 PMCID: PMC5030643 DOI: 10.1038/srep33702] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 09/01/2016] [Indexed: 11/25/2022] Open
Abstract
Neurons communicate via an essential process called exocytosis. Cholesterol, an abundant lipid in both secretory vesicles and cell plasma membrane can affect this process. In this study, amperometric recordings of vesicular dopamine release from two different artificial cell models created from a giant unilamellar liposome and a bleb cell plasma membrane, show that with higher membrane cholesterol the kinetics for vesicular release are decelerated in a concentration dependent manner. This reduction in exocytotic speed was consistent for two observed modes of exocytosis, full and partial release. Partial release events, which only occurred in the bleb cell model due to the higher tension in the system, exhibited amperometric spikes with three distinct shapes. In addition to the classic transient, some spikes displayed a current ramp or plateau following the maximum peak current. These post spike features represent neurotransmitter release from a dilated pore before constriction and show that enhancing membrane rigidity via cholesterol adds resistance to a dilated pore to re-close. This implies that the cholesterol dependent biophysical properties of the membrane directly affect the exocytosis kinetics and that membrane tension along with membrane rigidity can influence the fusion pore dynamics and stabilization which is central to regulation of neurochemical release.
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Affiliation(s)
- Neda Najafinobar
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Lisa J. Mellander
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden
| | - Michael E. Kurczy
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Johan Dunevall
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Tina B. Angerer
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden
| | - John S. Fletcher
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Ann-Sofie Cans
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
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Frolov VA, Escalada A, Akimov SA, Shnyrova AV. Geometry of membrane fission. Chem Phys Lipids 2015; 185:129-40. [DOI: 10.1016/j.chemphyslip.2014.07.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 07/16/2014] [Accepted: 07/18/2014] [Indexed: 11/24/2022]
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Tian F, Yue T, Li Y, Zhang X. Computer simulation studies on the interactions between nanoparticles and cell membrane. Sci China Chem 2014. [DOI: 10.1007/s11426-014-5231-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Ryu YS, Lee IH, Suh JH, Park SC, Oh S, Jordan LR, Wittenberg NJ, Oh SH, Jeon NL, Lee B, Parikh AN, Lee SD. Reconstituting ring-rafts in bud-mimicking topography of model membranes. Nat Commun 2014; 5:4507. [PMID: 25058275 PMCID: PMC4124864 DOI: 10.1038/ncomms5507] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 06/25/2014] [Indexed: 01/30/2023] Open
Abstract
During vesicular trafficking and release of enveloped viruses, the budding and fission processes dynamically remodel the donor cell membrane in a protein- or a lipid-mediated manner. In all cases, in addition to the generation or relief of the curvature stress, the buds recruit specific lipids and proteins from the donor membrane through restricted diffusion for the development of a ring-type raft domain of closed topology. Here, by reconstituting the bud topography in a model membrane, we demonstrate the preferential localization of cholesterol- and sphingomyelin-enriched microdomains in the collar band of the bud-neck interfaced with the donor membrane. The geometrical approach to the recapitulation of the dynamic membrane reorganization, resulting from the local radii of curvatures from nanometre-to-micrometre scales, offers important clues for understanding the active roles of the bud topography in the sorting and migration machinery of key signalling proteins involved in membrane budding.
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Affiliation(s)
- Yong-Sang Ryu
- School of Electrical Engineering #032, Seoul National University, Kwanak P.O. Box 34, Seoul 151-600, Republic of Korea
| | - In-Ho Lee
- School of Electrical Engineering #032, Seoul National University, Kwanak P.O. Box 34, Seoul 151-600, Republic of Korea
| | - Jeng-Hun Suh
- School of Electrical Engineering #032, Seoul National University, Kwanak P.O. Box 34, Seoul 151-600, Republic of Korea
| | - Seung Chul Park
- School of Electrical Engineering #032, Seoul National University, Kwanak P.O. Box 34, Seoul 151-600, Republic of Korea
| | - Soojung Oh
- World Class University (WCU) Program of Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Republic of Korea
| | - Luke R. Jordan
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Nathan J. Wittenberg
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Sang-Hyun Oh
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Noo Li Jeon
- World Class University (WCU) Program of Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Republic of Korea
| | - Byoungho Lee
- School of Electrical Engineering #032, Seoul National University, Kwanak P.O. Box 34, Seoul 151-600, Republic of Korea
| | - Atul N. Parikh
- Department of Biomedical Engineering and Chemical Engineering and Materials Science, University of California, Davis, California 95616, USA
- Centre for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, Singapore 637553, Singapore
| | - Sin-Doo Lee
- School of Electrical Engineering #032, Seoul National University, Kwanak P.O. Box 34, Seoul 151-600, Republic of Korea
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