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- W2067309199 abstract "We assayed fusion events between giant unilamellar vesicles (GUVs) and budded viruses (BVs) of baculovirus (Autographa californica nucleopolyhedrovirus), the envelopes of which have been labeled with the fluorescent dye Alexa Fluor 488. This involves observing the intensity of fluorescence emitted from the lipid bilayer of single GUVs after fusion using laser scanning microscopy. Using this assay system, we found that fusion between single GUVs and BV envelopes was significantly enhanced at around pH 5.0-6.0, which suggests that: (1) envelope glycoprotein GP64-mediated membrane fusion within the endosome of insect cells was reproduced in our artificial system; (2) acidic phospholipids in GUVs are necessary for this fusion, which are in agreement with the previous results with conventional small liposomes including large unilamellar vesicles and multilamellar vesicles; and (3) the efficiency of fusion is significantly affected by membrane properties that can be modulated by adding cholesterol to GUV lipid bilayers. In addition, the microscopic observation of BV-fused single GUVs showed that a weak interaction occurred between BVs and GUVs containing dioleoylphosphatidylserine at pH 6.0-6.5, and components of BV envelopes were unevenly distributed upon fusion with GUVs containing saturated phospholipid with cholesterol. We further demonstrated that when the recombinant membrane protein, adrenergic beta(2) receptor, was expressed on recombinant BV envelopes, the protein distribution on BV-fused GUVs was also affected by their lipid contents." @default.
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- W2067309199 date "2010-09-01" @default.
- W2067309199 modified "2023-09-29" @default.
- W2067309199 title "Confocal microscopic observation of fusion between baculovirus budded virus envelopes and single giant unilamellar vesicles" @default.
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- W2067309199 doi "https://doi.org/10.1016/j.bbamem.2010.05.011" @default.
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