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  • Shapes of discoid intracellular compartments with small relative volumes [Elektronski vir]
    Derganc, Jure, 1973- ; Božič, Bojan, 1965- ; Romih, Rok
    A prominent feature of many intracellular compartments is a large membrane surface area relative to their luminal volume, i.e., the small relative volume. In this study we present a theoretical ... analysis of discoid membrane compartments with a small relative volume and then compare the theoretical results to quantitative morphological assessment of fusiform vesicles in urinary bladder umbrella cells. Specifically, we employ three established extensions of the standard approach to lipid membrane shape calculation and determine the shapes that could be expected according to three scenarios of membrane shaping: membrane adhesion in the central discoid part, curvature driven lateral segregation of membrane constituents, and existence of stiffer membrane regions, e.g., support by protein scaffolds. The main characteristicsof each scenario are analyzed. The results indicate that even though all three scenarios can lead to similar shapes, there are values of model parameters that yield qualitatively distinctive shapes. Consequently, a distinctive shape of an intracellular compartment may reveal its membrane shaping mechanism and the membrane structure. The observed shapes of fusiform vesicles fall into two qualitatively different classes, yet they are all consistent with the theoretical results and the current understanding of theirstructure and function.
    Source: PloS one [Elektronski vir]. - ISSN 1932-6203 (Vol. 6, issue 11, 2011, str. [1-9]. e26824)
    Type of material - e-article
    Publish date - 2011
    Language - english
    COBISS.SI-ID - 29195737

    Link(s):

    http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0026824
    DOI

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