On the Role of Anisotropy of Membrane Constituents in Formation of a Membrane Neck During Budding of a Multicomponent Membrane.
From: Laboratory of Physics, Faculty of Electrical Engineering, University of Ljubljana, Ljubljana, Slovenia. ales.iglic@fe.uni-lj.si
Journal of biomechanics
- Publish Date: 2007
- ISSN: 0021-9290
- Volume: 40
- Issue: 3
- Pages: 579-85
- Medium: Print
- Language: English
- Citation (JAMA): Iglic Ales, Babnik Blaz, Bohinc Klemen, et al. On the Role of Anisotropy of Membrane Constituents in Formation of a Membrane Neck During Budding of a Multicomponent Membrane.. 2007;40:579-85
Abstract
The expression for the isotropic membrane bending energy was generalized for the case of a multicomponent membrane where the membrane constituents (single molecules or small complexes of molecules-membrane inclusions) were assumed to be anisotropic. Using this generalized expression for the membrane energy it was shown that the change of intrinsic shape of membrane components may induce first-order-like shape transitions leading to the formation of a membrane neck. The predicted discontinuous membrane shape transition and the concomitant lateral segregation of membrane components were applied to study membrane budding. Based on the results presented we conclude that the budding process might be driven by accumulation of anisotropic membrane components in the necks connecting the bud and the parent membrane, and by accumulation of isotropic (conical) membrane components on the bud. Both processes may strongly depend on the intrinsic shape of membrane components and on the direct interactions between them.
Mesh Headings (Keywords): Anisotropy, Biomechanics, Cell Membrane, Models, Biological
Check for Full Text / PubMed Unique Identifier (PMID): 16584736
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