The CD63-Syntenin-1 Complex Controls Post-Endocytic Trafficking of Oncogenic Human Papillomaviruses.

The CD63-Syntenin-1 Complex Controls Post-Endocytic Trafficking of Oncogenic Human Papillomaviruses.
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DOI:
10.1038/srep32337
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发表时间:
2016-08-31
期刊:
影响因子:
4.6
通讯作者:
Florin L
Florin L
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Gräßel L;Fast LA;Scheffer KD;Boukhallouk F;Spoden GA;Tenzer S;Boller K;Bago R;Rajesh S;Overduin M;Berditchevski F;Florin L

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人乳头瘤病毒通过包含四跨膜蛋白的网格蛋白非依赖性内吞途径进入宿主细胞。然而,病毒衣壳解体所需的内吞后运输仍不清楚。在这里,我们表明,早期贩运途径的内化HPV颗粒涉及四跨膜蛋白CD 63,syntenin-1和ESCRT相关的衔接蛋白阿利克斯。在内化后,在CD 63阳性内体中发现病毒颗粒,其募集syntenin-1,一种CD 63相互作用的衔接蛋白。电子显微镜和免疫荧光实验表明,CD 63-syntenin-1复合物控制递送内化的病毒颗粒到多囊内体。因此,高危型HPV 16、18和31型的感染性以及病毒颗粒的分解和去包被后加工在CD 63或syntenin-1耗尽的细胞中被显著抑制。我们的分析还提出了syntenin-1相互作用蛋白阿利克斯作为HPV感染的关键和CD 63-syntenin-1-阿利克斯复合物的形成作为细胞内运输的先决条件,使病毒衣壳解体。因此,我们的研究结果确定了CD 63-syntenin-1-阿利克斯复合物作为内吞后HPV运输的关键调控组分。
Human papillomaviruses enter host cells via a clathrin-independent endocytic pathway involving tetraspanin proteins. However, post-endocytic trafficking required for virus capsid disassembly remains unclear. Here we demonstrate that the early trafficking pathway of internalised HPV particles involves tetraspanin CD63, syntenin-1 and ESCRT-associated adaptor protein ALIX. Following internalisation, viral particles are found in CD63-positive endosomes recruiting syntenin-1, a CD63-interacting adaptor protein. Electron microscopy and immunofluorescence experiments indicate that the CD63-syntenin-1 complex controls delivery of internalised viral particles to multivesicular endosomes. Accordingly, infectivity of high-risk HPV types 16, 18 and 31 as well as disassembly and post-uncoating processing of viral particles was markedly suppressed in CD63 or syntenin-1 depleted cells. Our analyses also present the syntenin-1 interacting protein ALIX as critical for HPV infection and CD63-syntenin-1-ALIX complex formation as a prerequisite for intracellular transport enabling viral capsid disassembly. Thus, our results identify the CD63-syntenin-1-ALIX complex as a key regulatory component in post-endocytic HPV trafficking.
肝素增加了独立于细胞表面蛋白聚糖的16型人乳头瘤病毒的感染性,并诱导L1表位暴露。
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