Nucleocytoplasmic mRNP export is an integral part of mRNP biogenesis.

Nucleocytoplasmic mRNP export is an integral part of mRNP biogenesis.
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DOI:
10.1007/s00412-010-0298-1
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发表时间:
2011-02
期刊:
影响因子:
1.6
通讯作者:
Wieslander L
Wieslander L
中科院分区:
生物学3区
文献类型:
--
作者:
Björk P;Wieslander L

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核质输出与mRNPs的生物发生密切相关。在该基因上,伴随着前-mRNA的合成,转录机制、hnRNP蛋白、加工、质量控制和出口机制相互协作,释放、加工和出口具有竞争力的mRNPs。在通过染色质间隙扩散后,mRNPs通过核孔复合体转移并释放到细胞质中。在核孔复合体,定义的成分和构象变化被触发,但特定的共转录增加的成分被保留在mRNP中,从而影响mRNP的细胞质命运。在基因位点和核孔复合体上发生的过程对于整合出口作为基因表达的一个重要部分至关重要。在对巴尔比亚尼环基因的分析中,强调了这些事件的空间、时间和结构方面。
Nucleocytoplasmic export and biogenesis of mRNPs are closely coupled. At the gene, concomitant with synthesis of the pre-mRNA, the transcription machinery, hnRNP proteins, processing, quality control and export machineries cooperate to release processed and export competent mRNPs. After diffusion through the interchromatin space, the mRNPs are translocated through the nuclear pore complex and released into the cytoplasm. At the nuclear pore complex, defined compositional and conformational changes are triggered, but specific cotranscriptionally added components are retained in the mRNP and subsequently influence the cytoplasmic fate of the mRNP. Processes taking place at the gene locus and at the nuclear pore complex are crucial for integrating export as an essential part of gene expression. Spatial, temporal and structural aspects of these events have been highlighted in analyses of the Balbiani ring genes.
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