The role of viral protein Ac34 in nuclear relocation of subunits of the actin-related protein 2/3 complex

The role of viral protein Ac34 in nuclear relocation of subunits of the actin-related protein 2/3 complex
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病毒蛋白 Ac34 在肌动蛋白相关蛋白 2/3 复合体亚基核重定位中的作用

DOI:
10.1007/s12250-016-3912-4
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发表时间:
2016-12
期刊:
影响因子:
5.5
通讯作者:
Wang Yun
Wang Yun
中科院分区:
医学2区
文献类型:
--
作者:
Mu Jingfang;Zhang Yongli;Hu Yangyang;Hu Xue;Zhou Yuan;Chen Xinwen;Wang Yun

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肌动蛋白成核剂肌动蛋白相关蛋白复合物(Arp 2/3)由七个亚基组成:Arp 2、Arp 3、p40/ARPC 1(P40)、p34/ARPC 2(P34)、p21/ARPC 3(P21)、p20/ARPC 4(P20)和p16/ARPC 5(P16)。Arp 2/3通过调节肌动蛋白聚合在细胞的多种活动中发挥重要作用,苜蓿银纹夜蛾核型多角体病毒(Autographa californicamultiple nucleopolyhedrovirus,AcMNPV)是目前研究最多的一种杆状病毒,它通过诱导Arp 2/3核移位和介导肌动蛋白聚合来辅助病毒的复制。我们已经证明,Ac 34,病毒的后期基因产物,诱导易位的Arp 2/3的P40亚基的细胞核在AcMNPV感染。然而,Ac 34是否可以将其他Arp 2/3亚基定位到细胞核中仍然是未知的。在这项研究中,病毒蛋白Ac 34对这些亚基的分布的影响进行了研究,通过免疫荧光测定。从草地贪夜蛾(Spodoptera frugiperda)(Sf 9)细胞中克隆的Arp 2、P34、P21和P20主要定位于细胞质中,在Ac 34存在下,它们被重新定位到细胞核中。此外,Arp 3定位在细胞质中的存在和不存在的Ac 34,和P16显示全细胞定位。与Sf 9细胞相反,哺乳动物Arp 2/3的所有亚基在Ac 34的存在下没有显示出核移位。Ac 34与Arp 2/3亚基相互作用的免疫共沉淀分析显示,Ac 34与Sf 9细胞的P40、P34和P20结合。然而,没有哺乳动物Arp 2/3亚基与Ac 34相互作用,表明蛋白质-蛋白质相互作用是Ac 34将Arp 2/3亚基重新定位到细胞核所必需的。
The actin nucleator actin-related protein complex (Arp2/3) is composed of seven subunits: Arp2, Arp3, p40/ARPC1 (P40), p34/ARPC2 (P34), p21/ARPC3 (P21), p20/ARPC4 (P20), and p16/ARPC5 (P16). Arp2/3 plays crucial roles in a variety of cellular activities through regulation of actin polymerization.Autographa californicamultiple nucleopolyhedrovirus (AcMNPV), one of the beststudied alphabaculoviruses, induces Arp2/3 nuclear relocation and mediates nuclear actin polymerization to assist in virus replication. We have demonstrated that Ac34, a viral late-gene product, induces translocation of the P40 subunit of Arp2/3 to the nucleus during AcMNPV infection. However, it remains unknown whether Ac34 could relocate other Arp2/3 subunits to the nucleus. In this study, the effects of the viral protein Ac34 on the distribution of these subunits were studied by an immunofluorescence assay. Arp2, P34, P21, and P20 cloned fromSpodoptera frugiperda(Sf9) cells showed mainly cytoplasmic localization and were relocated to the nucleus in the presence of Ac34. In addition, Arp3 was localized in the cytoplasm in both the presence and absence of Ac34, and P16 showed whole-cell localization. In contrast to Sf9 cells, all subunits of mammalian Arp2/3 showed no nuclear relocation in the presence of Ac34. Co-immunoprecipitation analysis of the interaction between Ac34 and Arp2/3 subunits revealed that Ac34 bound to P40, P34, and P20 of Sf9 cells. However, none of the subunits of mammalian Arp2/3 interacted with Ac34, indicating that protein-protein interaction is essential for Ac34 to relocate Arp2/3 subunits to the nucleus.
DOI: 10.1083/jcb.146.2.267
发表时间: 1999-07-26
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影响因子: --
作者:
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通讯作者: Insall RH
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DOI: 10.1016/j.virol.2012.10.022
发表时间: 2013-01-20
期刊: Virology
影响因子: 3.7
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苜蓿银纹夜蛾多核多角体病毒 Ac34 蛋白通过破坏 CRM1 依赖性核输出将细胞肌动蛋白相关蛋白 2/3 复合物保留在细胞核中
DOI: 10.1371/journal.ppat.1005994
发表时间: 2016-11
期刊: PLoS pathogens
影响因子: 6.7
作者:
Mu J;Zhang Y;Hu Y;Hu X;Zhou Y;Zhao H;Pei R;Wu C;Chen J;Zhao H;Yang K;Oers MM;Chen X;Wang Y
通讯作者: Wang Y