PMID: 9448279Mar 14, 1998Paper

Opening-up of liposomal membranes by talin

Proceedings of the National Academy of Sciences of the United States of America
A SaitohH Hotani

Abstract

Morphological changes of liposomes caused by interactions between liposomal membranes and talin, a cytoskeletal submembranous protein, were studied by direct, real-time observation by using high-intensity dark-field microscopy. Surprisingly, when talin was added to a liposome solution, liposomes opened stable holes and were transformed into cup-shaped liposomes. The holes became larger with increasing talin concentration, and finally the cup-shaped liposomes were transformed into lipid bilayer sheets. These morphological changes were reversed by protein dilution, i.e., the sheets could be transformed back into closed spherical liposomes. We demonstrated that talin was localized mainly along the membrane verges, presumably avoiding exposure of its hydrophobic portion at the edge of the lipid bilayer. This is the first demonstration that a lipid bilayer can stably maintain a free verge in aqueous solution. This finding refutes the established dogma that all lipid bilayer membranes inevitably form closed vesicles and suggests that talin is a useful tool for manipulating liposomes.

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Citations

Dec 31, 2002·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Kingo TakiguchiHirokazu Hotani
Aug 12, 2009·Journal of Biological Physics·Yajun Yin, Cunjing Lv
Oct 7, 2003·Journal of Colloid and Interface Science·Jean-Paul DouliezDenis Renard
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Jul 29, 2010·Journal of the American Chemical Society·Tsutomu HamadaMasahiro Takagi
Jun 1, 2002·Journal of Biological Physics·F NomuraH Hotani
Feb 28, 2004·Proceedings of the National Academy of Sciences of the United States of America·Fumimasa NomuraKingo Takiguchi
Feb 28, 2001·Proceedings of the National Academy of Sciences of the United States of America·F NomuraK Takiguchi
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Sep 25, 2019·Advanced Materials·Naohiko ShimadaAtsushi Maruyama

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