Identification of an Intercistronic Internal Ribosome Entry Site in a Marek's Disease Virus Immediate-Early Gene

Identification of an Intercistronic Internal Ribosome Entry Site in a Marek's Disease Virus Immediate-Early Gene
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马立克氏病病毒立即早期基因顺反子间内部核糖体进入位点的鉴定

DOI:
10.1128/jvi.02602-08
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发表时间:
2009
影响因子:
5.4
通讯作者:
Tahiri-Alaoui A
Tahiri-Alaoui A
中科院分区:
医学2区
文献类型:
--
作者:
Tahiri-Alaoui A

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在这项研究中,我们从高传染性疱疹病毒马立克病病毒(MDV)中鉴定了一个内部核糖体进入位点(IRES)。我们从mdv转化的CD4+ t细胞系MSB-1中克隆了一个双链mRNA,将IRES映射到其顺反子间区(ICR)。该转录本是mrna家族的一员,表达为具有两个开放阅读框(ORF)的立即早期基因。第一个ORF编码一个14kda的多肽,具有两个n端剪接变体,而第二个ORF完全包含在单个外显子内,编码一个12kda的蛋白质,也称为RLORF9。我们已经证明,当帽依赖性翻译被抑制时,分离两个orf的ICR作为IRES起控制RLORF9翻译的作用。缺失分析显示在ICR中存在两个潜在的IRES元素。对MDV 1型致癌株进行的反向遗传实验表明,ires控制的RLORF9缺失对病毒复制或MDV诱导的死亡率没有显著影响。
In this study, we have identified an internal ribosome entry site (IRES) from the highly infectious herpesvirus Marek's disease virus (MDV). The IRES was mapped to the intercistronic region (ICR) of a bicistronic mRNA that we cloned from the MDV-transformed CD4+T-cell line MSB-1. The transcript is a member of a family of mRNAs expressed as immediate-early genes with two open reading frames (ORF). The first ORF encodes a 14-kDa polypeptide with two N-terminal splice variants, whereas the second ORF is contained entirely within a single exon and encodes a 12-kDa protein also known as RLORF9. We have shown that the ICR that separates the two ORFs functions as an IRES that controls the translation of RLORF9 when cap-dependent translation is inhibited. Deletion analysis revealed that there are two potential IRES elements within the ICR. Reverse genetic experiments with the oncogenic strain of MDV type 1 indicated that deletion of IRES-controlled RLORF9 does not significantly affect viral replication or MDV-induced mortality.
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发表时间: 2006-07-01
影响因子: 3.1
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Liu, Hsiao-Ching S.;Soderblom, Erik J.;Goshe, Michael B.
通讯作者: Goshe, Michael B.
不同的 IRES 元件接管宿主核糖体。
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影响因子: 3.9
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发表时间: 2004-09-21
影响因子: 11.1
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