p143 -mediated rRNA degradation in AcMNPV-infected BM-N cells is not associated with viral DNA replication

p143 -mediated rRNA degradation in AcMNPV-infected BM-N cells is not associated with viral DNA replication
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AcMNPV 感染的 BM-N 细胞中 p143 介导的 rRNA 降解与病毒 DNA 复制无关

DOI:
10.11416/jibs.83.1_019
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发表时间:
2014
影响因子:
--
通讯作者:
M. Ikeda
M. Ikeda
中科院分区:
--
文献类型:
--
作者:
Rina Hamajima;Michihiro Kobayashi;M. Ikeda

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我们先前的研究表明,家蚕BM-N细胞在感染异源核型多角体病毒时会发生rRNA的裂解和降解,这些核型多角体病毒包括油菜夜蛾核型多角体病毒、美国白蛾核型多角体病毒、甜菜夜蛾核型多角体病毒和斜纹夜蛾核型多角体病毒。此外,瞬时表达分析表明,病毒P143是杆状病毒DNA解旋酶,对病毒DNA复制至关重要,是导致观察到的rRNA裂解和降解的原因。在这里,我们使用一个p143功能缺陷的AcMNPV温度敏感突变体(Ts8)在不允许的温度下检测了病毒DNA复制是否与AcMNPV感染的BM-N细胞中的rRNA切割和降解有关。对TS8感染的BM-N细胞总RNA的电泳分析表明,在不允许的温度下,在没有病毒DNA复制的情况下,rRNA仍然发生裂解和降解。此外,用Ac-p143缺失Ac-MNPV的BM-N细胞进行的转染分析表明,p143基因在感染AcMNPV的BM-N细胞中负责rRNA的切割和降解。综上所述,这些结果表明,在NPV感染的BM-N细胞中,p143的病毒DNA复制相关功能可能与rRNA切割和降解无关。
We previously showed that rRNA cleavage and degradation occur in Bombyx mori BM-N cells upon infection with heterologous NPVs, including Autographa californica multiple NPV (AcMNPV), Hyphantria cunea MNPV, Spodoptera exigua MNPV, and Spodoptera litura MNPV. Additionally, transient expression assay analyses suggested that viral P143s, which are baculovirus DNA helicases that are essential for viral DNA replication, are responsible for the observed rRNA cleavage and degradation. Here, we examined whether viral DNA replication is related to rRNA cleavage and degradation in AcMNPV-infected BM-N cells using an AcMNPV temperature-sensitive-mutant (ts8) defective in P143 function at non-permissive temperature. Electrophoretic analyses of total RNAs from ts8-infected BM-N cells revealed that rRNA cleavage and degradation still occurred in the absence of viral DNA replication at non-permissive temperature. In addition, transfection analysis with an ac-p143 null Ac-MNPV bacmid demonstrated that the p143 gene is responsible for rRNA cleavage and degradation in AcMNPV-infected BM-N cells. Taken together, these results indicate the possibility that the viral DNA replication-related function of P143 is not associated with rRNA cleavage and degradation in NPV-infected BM-N cells.
Shirata, N.:“苜蓿银纹夜蛾(鳞翅目:夜蛾科)、家蚕(鳞翅目:家蚕科)、美国白蛾(鳞翅目:牛蒴科)和甜菜夜蛾(鳞翅目:夜蛾科)的核多角体病毒在四种鳞翅目中的复制
DOI: --
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作者:
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DOI: 10.1016/j.virol.2004.01.002
发表时间: 2004-04-10
期刊: VIROLOGY
影响因子: 3.7
作者:
Ikeda, M;Yanagimoto, K;Kobayashi, M
通讯作者: Kobayashi, M
感染 AcMNPV 的 BmN 细胞中核糖体 RNA 显着减少
DOI: --
发表时间: 2005
期刊: J. Insect Biotech. Sericol. 74・3
影响因子: --
作者:
Yoshinaga;K.;Arimura;SI.;Niwa;Y.;Tsutsumi;N.;Uchimiya;H.;Kawai-Yamada;M.;R. Fujita
通讯作者: R. Fujita