Direct and dynamic detection of HIV-1 in living cells.

Direct and dynamic detection of HIV-1 in living cells.
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DOI:
10.1371/journal.pone.0050026
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Leonhardt H
Leonhardt H
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Helma J;Schmidthals K;Lux V;Nüske S;Scholz AM;Kräusslich HG;Rothbauer U;Leonhardt H

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In basic and applied HIV research, reliable detection of viral components is crucial to monitor progression of infection. While it is routine to detect structural viral proteins in vitro for diagnostic purposes, it previously remained impossible to directly and dynamically visualize HIV in living cells without genetic modification of the virus. Here, we describe a novel fluorescent biosensor to dynamically trace HIV-1 morphogenesis in living cells. We generated a camelid single domain antibody that specifically binds the HIV-1 capsid protein (CA) at subnanomolar affinity and fused it to fluorescent proteins. The resulting fluorescent chromobody specifically recognizes the CA-harbouring HIV-1 Gag precursor protein in living cells and is applicable in various advanced light microscopy systems. Confocal live cell microscopy and super-resolution microscopy allowed detection and dynamic tracing of individual virion assemblies at the plasma membrane. The analysis of subcellular binding kinetics showed cytoplasmic antigen recognition and incorporation into virion assembly sites. Finally, we demonstrate the use of this new reporter in automated image analysis, providing a robust tool for cell-based HIV research.
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