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首页> 外文期刊>Molecular and Cellular Biology >Lymphotropic Herpesvirus saimiri Uses the SMN Complex To Assemble Sm Cores on Its Small RNAs
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Lymphotropic Herpesvirus saimiri Uses the SMN Complex To Assemble Sm Cores on Its Small RNAs

机译:淋巴性疱疹病毒saimiri使用SMN复合物在其小RNA上组装Sm核

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The lymphotropic Herpesvirus saimiri (HVS) causes acute leukemia, T-cell lymphoma, and death in New World monkeys. HVS encodes seven small RNAs (HSURs) of unknown function. The HSURs acquire host Sm proteins and assemble Sm cores similar to those found on the spliceosomal small nuclear RNPs (snRNPs). Here we show that, like host snRNPs, HSURs use the SMN (survival of motor neurons) complex to assemble Sm cores. The HSURs bind the SMN complex directly and with very high affinity, similar to or higher than that of host snRNAs, and can outcompete host snRNAs for SMN-dependent assembly into RNPs. These observations highlight the general utility of the SMN complex for RNP assembly and suggest that infectious agents that engage the SMN complex may burden SMN-dependent pathways, possibly leading to a deleterious reduction in available SMN complex for essential host functions.
机译:嗜淋巴细胞性疱疹病毒 (HVS)导致急性白血病,T细胞淋巴瘤和新大陆猴死亡。 HVS编码功能未知的七个小RNA(HSUR)。 HSURs获得宿主Sm蛋白并组装Sm核,类似于在剪接小核RNP(snRNP)上发现的Sm核。在这里,我们表明,与宿主snRNP一样,HSUR也使用SMN(运动神经元存活)复合体组装Sm核心。 HSUR直接并以非常高的亲和力(与宿主snRNA相似或更高)结合SMN复合物,并且可以与宿主snRNA竞争,以依赖SMN组装成RNP。这些观察结果突出了SMN复合物在RNP组装中的一般用途,并表明与SMN复合物接触的传染原可能给SMN依赖的途径加重负担,可能导致基本宿主功能的可用SMN复合物减少。

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