The chloroplast ribosomal protein large subunit 1 interacts with viral polymerase and promotes virus infection.

The chloroplast ribosomal protein large subunit 1 interacts with viral polymerase and promotes virus infection.
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叶绿体核糖体蛋白大亚基1与病毒聚合酶相互作用促进病毒感染

DOI:
10.1093/plphys/kiab249
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发表时间:
2021-09-04
期刊:
影响因子:
7.4
通讯作者:
Li XD
Li XD
中科院分区:
生物学1区
文献类型:
--
作者:
Cheng DJ;Xu XJ;Yan ZY;Tettey CK;Fang L;Yang GL;Geng C;Tian YP;Li XD

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叶绿体核糖体蛋白与宿主降解因子竞争结合病毒RNA依赖性RNA聚合酶,从而促进烟草脉带花叶病毒感染。叶绿体在植物病毒与宿主的军备竞赛中发挥着不可或缺的作用。叶绿体蛋白经常被植物病毒招募来支持病毒复制和运动。然而,叶绿体蛋白调节马铃薯Y病毒感染的机制仍然很大程度上未知。在这项研究中,我们观察到烟草本塞姆氏核糖体蛋白大亚基 1 (NbRPL1) 是一种叶绿体核糖体蛋白,通过其 N 端 61 个氨基酸(转运肽)定位于叶绿体,并与烟草脉带花叶病毒 (TVBMV) 核包涵蛋白 b (NIb) 相互作用,后者是一种 RNA 依赖性蛋白。 RNA聚合酶。 TVBMV 感染后,NbRPL1 被招募到叶绿体中 6K2 诱导的病毒复制复合物中。 NbRPL1 表达沉默会减少 TVBMV 复制。 NbRPL1 与 NbBeclin1 竞争结合 NIb,并减少 NbBeclin1 介导的 NIb 降解。因此,我们的结果表明,NbRPL1 与叶绿体中的 NIb 相互作用,减少 NbBeclin1 介导的 NIb 降解,并增强 TVBMV 感染。
A chloroplast ribosomal protein competes with a host degradation factor to bind the viral RNA-dependent RNA polymerase and thus promotes tobacco vein banding mosaic virus infection. Chloroplasts play an indispensable role in the arms race between plant viruses and hosts. Chloroplast proteins are often recruited by plant viruses to support viral replication and movement. However, the mechanism by which chloroplast proteins regulate potyvirus infection remains largely unknown. In this study, we observed that Nicotiana benthamiana ribosomal protein large subunit 1 (NbRPL1), a chloroplast ribosomal protein, localized to the chloroplasts via its N-terminal 61 amino acids (transit peptide), and interacted with tobacco vein banding mosaic virus (TVBMV) nuclear inclusion protein b (NIb), an RNA-dependent RNA polymerase. Upon TVBMV infection, NbRPL1 was recruited into the 6K2-induced viral replication complexes in chloroplasts. Silencing of NbRPL1 expression reduced TVBMV replication. NbRPL1 competed with NbBeclin1 to bind NIb, and reduced the NbBeclin1-mediated degradation of NIb. Therefore, our results suggest that NbRPL1 interacts with NIb in the chloroplasts, reduces NbBeclin1-mediated NIb degradation, and enhances TVBMV infection.
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发表时间: 2014-09-01
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