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Intron or no intron: a matter for nuclear pore complexes

机译:内含子或无内含子:核孔复合物的问题

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摘要

Nuclear pore complexes (NPCs) have been shown to regulate distinct steps of the gene expression process, from transcription to mRNA export. In particular, mRNAs expressed from intron-containing genes are surveyed by a specific NPC-dependent quality control pathway ensuring that unspliced mRNAs are retained within the nucleus. In this Extra View, we summarize the different approaches that have been developed to evaluate the contribution of various NPC components to the expression of intron-containing genes. We further present the mechanistic models that could account for pre-mRNA retention at the nuclear side of NPCs. Finally, we discuss the possibility that other stages of intron-containing gene expression could be regulated by nuclear pores, in particular through the regulation of mRNA biogenesis factors by the NPC-associated SUMO protease Ulp1.
机译:核孔复合物(NPC)已被证明可调节基因表达过程的不同步骤,从转录到mRNA输出。特别地,通过特定的NPC依赖性质量控制途径对含内含子基因表达的mRNA进行了调查,确保未剪接的mRNA保留在细胞核内。在此Extra View中,我们总结了已开发出的不同方法,用于评估各种NPC组件对含内含子基因表达的贡献。我们进一步介绍了可以解释前mRNA保留在NPC核侧的机制模型。最后,我们讨论了核内孔可以调控含内含子基因表达的其他阶段的可能性,特别是通过与NPC相关的SUMO蛋白酶Ulp1对mRNA生物发生因子的调控。

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