NtRBP45, a nuclear RNA-binding protein of Nicotiana tabacum, facilitates post-transcriptional gene silencing.

NtRBP45, a nuclear RNA-binding protein of Nicotiana tabacum, facilitates post-transcriptional gene silencing.
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NtRBP45 是烟草的一种核 RNA 结合蛋白,可促进转录后基因沉默

DOI:
10.1002/pld3.294
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发表时间:
2020-12
期刊:
影响因子:
3
通讯作者:
Li W
Li W
中科院分区:
生物学3区
文献类型:
--
作者:
Zhang W;Zhu Z;Du P;Zhang C;Yan H;Wang W;Li W

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烟草 RBP45 是一种核 RNA 结合蛋白 (RBP)。在这项研究中,我们发现 NtRBP45 的基因表达在烟草花叶病毒感染后显着上调,并且该蛋白的中心区域决定了其核定位。特别是,使用基于绿色荧光蛋白的瞬时抑制测定,我们发现瞬时过表达的 NtRBP45 能够增强局部转录后基因沉默(PTGS),促进 siRNA 积累,并损害番茄无精病毒 2b 蛋白介导的 RNA 沉默抑制。缺失突变表明 NtRBP45 的 N 端和 C 端区域对于增强 PTGS 都是必需的。总体数据表明,一种新的 RNA 沉默因子可能参与抗病毒防御。
The tobacco RBP45 is a nuclear RNA binding protein (RBP). In this study, we identified that the gene expression of NtRBP45 was significantly up‐regulated upon the Tobacco mosaic virus infection and the central region of the protein accounted for its nuclear localization. In particular, using a green fluorescent protein‐based transient suppression assay, we uncovered that the transiently overexpressed NtRBP45 was able to enhance local post‐transcriptional gene silencing (PTGS), facilitate siRNA accumulation, and compromise the RNA silencing suppression mediated by Tomato aspermy virus 2b protein. Deletion mutagenesis showed that both the N‐ and C‐terminal regions of NtRBP45 were necessary for enhancing PTGS. The data overall indicated a novel RNA silencing factor that might participate in antiviral defense.
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发表时间: 1986-03-01
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