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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Transport of messenger RNA from the nucleus to the cytoplasm.

All movement of molecules and macromolecules between the cytoplasm and the nucleus takes place through nuclear pore complexes (NPCs), very large macromolecular complexes that are the only channels connecting these compartments. mRNA export is mediated by multiple, highly conserved protein factors that couple steps of nuclear pre-mRNA biogenesis to mRNA transport. Mature messenger ribonucleoproteins (mRNPs) diffuse from sites of transcription to NPCs, although some active genes are positioned at the nuclear periphery where they interact physically with components of NPCs. As properly processed mRNPs translocate through the pore, certain mRNP proteins are removed, probably through the enzymatic action of the DEAD-box helicase Dbp5, which binds to Nup159 and Gle1, components of the cytoplasmic filaments of the NPC. Gle1 and the phosphoinositide IP6 activate Dbp5's ATPase activity in vitro and this could provide critical spatial regulation of Dbp5 activity in vivo.[1]


  1. Transport of messenger RNA from the nucleus to the cytoplasm. Cole, C.N., Scarcelli, J.J. Curr. Opin. Cell Biol. (2006) [Pubmed]
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