Single molecule localisation microscopy reveals how HIV-1 Gag proteins sense membrane virus assembly sites in living host CD4 T cells.
Single molecule localisation microscopy reveals how HIV-1 Gag proteins sense membrane virus assembly sites in living host CD4 T cells.
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DOI:
10.1038/s41598-018-34536-y
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发表时间:
2018-11-02
影响因子:
4.6
通讯作者:
Muriaux D
中科院分区:
文献类型:
--
作者:
Floderer C;Masson JB;Boilley E;Georgeault S;Merida P;El Beheiry M;Dahan M;Roingeard P;Sibarita JB;Favard C;Muriaux D
Monitoring virus assembly at the nanoscale in host cells remains a major challenge. Human immunodeficiency virus type 1 (HIV-1) components are addressed to the plasma membrane where they assemble to form spherical particles of 100 nm in diameter. Interestingly, HIV-1 Gag protein expression alone is sufficient to produce virus-like particles (VLPs) that resemble the immature virus. Here, we monitored VLP formation at the plasma membrane of host CD4+ T cells using a newly developed workflow allowing the analysis of long duration recordings of single-molecule Gag protein localisation and movement. Comparison of Gag assembling platforms in CD4+ T cells expressing wild type or assembly-defective Gag mutant proteins showed that VLP formation lasts roughly 15 minutes with an assembly time of 5 minutes. Trapping energy maps, built from membrane associated Gag protein movements, showed that one third of the assembling energy is due to direct Gag capsid-capsid interaction while the remaining two thirds require the nucleocapsid-RNA interactions. Finally, we show that the viral RNA genome does not increase the attraction of Gag at the membrane towards the assembling site but rather acts as a spatiotemporal coordinator of the membrane assembly process.
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影响因子:
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作者:
Ivanchenko S;Godinez WJ;Lampe M;Kräusslich HG;Eils R;Rohr K;Bräuchle C;Müller B;Lamb DC
通讯作者:
Lamb DC
影响因子:
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Chou, Tom
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作者:
El Beheiry, Mohamed;Tuerkcan, Silvan;Masson, Jean-Baptiste
通讯作者:
Masson, Jean-Baptiste