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  Understanding and controlling the morphological complexity of biomembranes

Lipowsky, R. (2019). Understanding and controlling the morphological complexity of biomembranes. In Advances in Biomembranes and Lipid Self-Assembly (pp. 105-157). doi:10.1016/bs.abl.2019.10.002.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-5977-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-5978-1
Genre: Book Chapter

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 Creators:
Lipowsky, Reinhard1, Author              
Affiliations:
1Reinhard Lipowsky, Theorie & Bio-Systeme, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863327              

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Free keywords: Constriction force, Curvature-induced division, Fine-tuned curvature, Gaint vesicle, Lipid bilayer, Membrane neck, Membrane tension, Multispherical shape, Nanovesicle, Tensionless leaflet
 Abstract: Biomimetic and biological membranes consist of lipid-protein bilayers in their fluid state. Because of their fluidity, these membranes can remodel both their molecular composition and their morphology in response to changes in their aqueous environments. Here, we will focus on morphological responses, motivated by recent experimental observations on giant vesicles. After a short reminder about curvature elasticity, two important recent developments will be described, the fine-tuning of the spontaneous curvature by membrane-bound proteins and the increased robustness of giant vesicles with spontaneously formed membrane nanotubes. The latter feature is intimately related to the concept of spontaneous membrane tension, which represents the intrinsic tension scale of curvature elasticity. Another important quantity, the mechanical membrane tension, is, in general, elusive to experimental studies of giant vesicles but can be determined in a quantitative manner by molecular simulations. One recent insight from such simulations is that it is important to distinguish tensionless bilayers from tensionless leaflets. In addition, using the stress profile obtained in the molecular simulations, we can obtain estimates for the curvature-elastic parameters. In the last part of the review, the framework of curvature elasticity is again taken up to further elucidate the morphological complexity of giant vesicles. Three aspects will be addressed: the stability of two-sphere vesicles with closed membrane necks; the curvature-induced constriction force acting on these necks, which can be used to cleave the necks and divide the vesicles in a controlled manner; and the striking polymorphism of multispheres generated by aqueous sucrose and glucose solutions.

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Language(s): eng - English
 Dates: 2019-11-222019
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/bs.abl.2019.10.002
 Degree: -

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Title: Advances in Biomembranes and Lipid Self-Assembly
Source Genre: Series
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Publ. Info: -
Pages: - Volume / Issue: 30 Sequence Number: - Start / End Page: 105 - 157 Identifier: ISSN: 2451-9634

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Title: Multiresponsive Behavior of Biomembranes and Giant Vesicles
Source Genre: Book
 Creator(s):
Lipowsky, Reinhard1, Editor            
Affiliations:
1 Reinhard Lipowsky, Theorie & Bio-Systeme, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863327            
Publ. Info: Academic Press
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISBN: 978-012817483-8