p120 catenin recruits HPV to γ-secretase to promote virus infection.

p120 catenin recruits HPV to γ-secretase to promote virus infection.
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DOI:
10.1371/journal.ppat.1008946
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发表时间:
2020-10
期刊:
影响因子:
6.7
通讯作者:
Tsai B
Tsai B
中科院分区:
医学1区
文献类型:
--
作者:
Harwood MC;Dupzyk AJ;Inoue T;DiMaio D;Tsai B

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在内化和运输过程中,人乳头瘤病毒 (HPV) 从细胞表面移动到核内体,其中跨膜蛋白酶 γ-分泌酶促进病毒 L2 衣壳蛋白插入核内体膜。 L2 通过内体膜突出到细胞质中,允许招募细胞质宿主因子,将病毒靶向高尔基体,进行有效感染。内体定位的 HPV 如何传递至 γ 分泌酶(感染的决定性步骤)尚不清楚。在这里,我们证明胞质 p120 连环蛋白可能通过一种未鉴定的跨膜蛋白在病毒内化和运输过程的早期时间点与 HPV 相互作用。在内体中,p120 不是 HPV L1 衣壳蛋白从传入病毒体中进行低 pH 依赖性分解所必需的。相反,p120 是 HPV 与 γ 分泌酶相互作用所必需的,这种相互作用确保病毒沿着有效途径运输。我们的研究结果阐明了一个神秘的 HPV 感染步骤,并为 HPV 感染提供了重要的见解,这可能会导致针对 HPV 引起的疾病的新治疗策略。人乳头瘤病毒 (HPV) 是宫颈癌、肛门生殖器癌和口咽癌的主要原因。尽管 HPV 对人类健康有重大影响,但人们对这种小型 DNA 病毒如何穿过宿主细胞引起感染的了解有限。这项工作确定了细胞因子 p120 连环蛋白在病毒沿着有效进入途径传播过程中的作用。具体来说,我们提出 p120 将 HPV 靶向跨膜蛋白 γ-分泌酶,这是病毒进入的关键步骤。因此,这项工作提供了对 HPV 细胞内转运机制的见解,并确定了 HPV 治疗的潜在治疗靶点。
During internalization and trafficking, human papillomavirus (HPV) moves from the cell surface to the endosome where the transmembrane protease γ-secretase promotes insertion of the viral L2 capsid protein into the endosome membrane. Protrusion of L2 through the endosome membrane into the cytosol allows the recruitment of cytosolic host factors that target the virus to the Golgi en route for productive infection. How endosome-localized HPV is delivered to γ-secretase, a decisive infection step, is unclear. Here we demonstrate that cytosolic p120 catenin, likely via an unidentified transmembrane protein, interacts with HPV at early time-points during viral internalization and trafficking. In the endosome, p120 is not required for low pH-dependent disassembly of the HPV L1 capsid protein from the incoming virion. Rather, p120 is required for HPV to interact with γ-secretase–an interaction that ensures the virus is transported along a productive route. Our findings clarify an enigmatic HPV infection step and provide critical insights into HPV infection that may lead to new therapeutic strategies against HPV-induced diseases. Human papillomavirus (HPV) is the primary cause of cervical, anogenital, and oropharyngeal cancers. Despite the significant impact of HPV on human health, there is limited understanding of how this small DNA virus traffics through a host cell to cause infection. This work identifies the role of the cellular factor p120 catenin in routing the virus along a productive entry pathway. Specifically, we propose that p120 targets HPV to the transmembrane protein γ-secretase, a critical step of viral entry. This work thus provides insights into the intracellular transport mechanisms of HPV and identifies a potential therapeutic target for HPV treatment.
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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