Mapping interactions between mRNA export factors in living cells.
Mapping interactions between mRNA export factors in living cells.
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DOI:
10.1371/journal.pone.0067676
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Wilson SA
中科院分区:
文献类型:
--
作者:
Teng IF;Wilson SA
The TREX complex couples nuclear mRNA processing events with subsequent export to the cytoplasm. TREX also acts as a binding platform for the mRNA export receptor Nxf1. The sites of mRNA transcription and processing within the nucleus have been studied extensively. However, little is known about where TREX assembly takes place and where Nxf1 is recruited to TREX to form the export competent mRNP. Here we have used sensitized emission Förster resonance energy transfer (FRET) and fluorescence lifetime imaging (FLIM)-FRET, to produce a spatial map in living cells of the sites for the interaction of two TREX subunits, Alyref and Chtop, with Nxf1. Prominent assembly sites for export factors are found in the vicinity of nuclear speckles in regions known to be involved in transcription, splicing and exon junction complex formation highlighting the close coupling of mRNA export with mRNP biogenesis.
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