A calmodulin-related protein that suppresses posttranscriptional gene silencing in plants

A calmodulin-related protein that suppresses posttranscriptional gene silencing in plants
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DOI:
10.1126/science.290.5489.142
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发表时间:
2000-10-06
期刊:
影响因子:
56.9
通讯作者:
Vance, VB
Vance, VB
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Anandalakshmi, R;Marathe, R;Vance, VB

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转录后基因沉默(PTGS)是一种古老的真核生物调控机制,其中特定的RNA序列被靶向并被破坏。植物马铃薯Y病毒的辅助组分蛋白酶(HC-Pro)抑制植物PTGS的发生;利用酵母双杂交系统,我们鉴定了一个与HC-Pro相互作用的钙调素相关蛋白(rgs-CaM)。在这里,我们报告说,rgs-CaM,像HC-Pro本身,抑制基因沉默。我们的工作是第一个报告确定PTGS的细胞抑制因子。
Posttranscriptional gene silencing (PTGS) is an ancient eukaryotic regulatory mechanism in which a particular RNA sequence is targeted and destroyed. The helper component-proteinase (HC-Pro) of plant potyviruses suppresses PTGS in plants; Using a yeast two-hybrid system, we identified a calmodulin-related protein (termed rgs-CaM) that interacts with HC-Pro. Here we report that rgs-CaM, like HC-Pro itself, suppresses gene silencing. Our work is the first report identifying a cellular suppressor of PTGS.