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Morphological types of gas vesicles
Algological Studies/Archiv für Hydrobiologie, Supplement Volumes, 1996By electron-microscopic analysis of cells of 7 planktic species (four genera) of cyanobacteria living at sea water- and fresh water-surfaces, three distinct types of gas vesicles in their aerotopes could be distinguished. To minimize the error due to some variability of gas vesicle diameters at direct measurement, vesicles per 0.1 ľm2 of the ...
Jan Šmarda, David Šmajs
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The buckling-condensation mechanism driving gas vesicle collapse
Soft Matter, 2023Gas vesicles (GVs) are protein shells that perform superbly as ultrasound contrast agents due to their tunable collapse pressure. Here, the roles of condensation and shell buckling in triggering and controlling final GV collapse are examined.
Tom Y. Zhao +3 more
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Extremophiles, 2014
Gas vesicles consist predominantly of the hydrophobic GvpA and GvpC, and the accessory proteins GvpF through GvpM are required in minor amounts during formation. GvpM and its putative interaction partners were investigated. GvpM interacted with GvpH, GvpJ and GvpL, but not with GvpG.
Stella, Tavlaridou +2 more
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Gas vesicles consist predominantly of the hydrophobic GvpA and GvpC, and the accessory proteins GvpF through GvpM are required in minor amounts during formation. GvpM and its putative interaction partners were investigated. GvpM interacted with GvpH, GvpJ and GvpL, but not with GvpG.
Stella, Tavlaridou +2 more
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Acoustic characterization of nano gas vesicles
2015 IEEE International Ultrasonics Symposium (IUS), 2015Due to the lack of a proper contrast agent, the scope of molecular ultrasound imaging is restricted within blood vessels. Recently reported biogenic nano gas vesicle (NGV), 400nm by 100nm rod shape nano-bubbles encapsulated by a bilayer protein shell, may extend molecular ultrasound imaging capability and find substantial values in therapy.
null Yaoheng Yang +5 more
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Gas vesicles enable ultrasound imaging
Nature Methods, 2018Acoustic reporter genes that produce gas vesicles offer a way to image and locate microorganisms in mammalian hosts.
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Distribution, formation and regulation of gas vesicles
Nature Reviews Microbiology, 2012A range of bacteria and archaea produce intracellular gas-filled proteinaceous structures that function as flotation devices in order to maintain a suitable depth in the aqueous environment. The wall of these gas vesicles is freely permeable to gas molecules and is composed of a small hydrophobic protein, GvpA, which forms a single-layer wall.
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Gas vesicles as collapsible MRI contrast agents
Nature Materials, 2018Microbial gas vesicles have been developed for use as MRI contrast agents whose contrast can be inactivated by applying ultrasound waves to collapse the vesicles.
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Segregation Vesicles, Gas Filter-Pressing, and Igneous Differentiation
The Journal of Geology, 1984Some vesicles in certain subaerial flows of basalt and basaltic andesite are partially filled with dark, partly-glassy segregation material. The segregation material has about three times the concentration of K₂O, TiO₂, and P₂O₅ as the associated host rock.
A. T. ANDERSON +3 more
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The Natural Selection of Gas Vesicles
1999Gas vesicles, which provide cyanobacteria and other prokaryotes with buoyancy, are hollow shells formed from protein. Although they have a simple structure which shows a basic uniformity in various groups of microorganisms, they exhibit some differences which can be explained by natural selection of smaller, stronger structures withstanding higher ...
Walsby, AE, Beard, SJ, Hayes, PK
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The elastic compressibility of gas vesicles
Proceedings of the Royal Society of London. Series B. Biological Sciences, 1982Theelastic compressibility of gas vesicles isolated from Anabaena flos-aquae has been measured with a specially constructed apparatus. The gas vesicle suspension was contained in a glass tube, closed at one end with a piston allowing volume adjustment and attached at the other end to a microcapillary, and was ...
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