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Tran EJ, et al.  (2007) The DEAD-box protein Dbp5 controls mRNA export by triggering specific RNA:protein remodeling events. Mol Cell 28(5):850-9

Abstract: Messenger RNA (mRNA) export involves the unidirectional passage of ribonucleoprotein particles (RNPs) through nuclear pore complexes (NPCs), presumably driven by the ATP-dependent activity of the DEAD-box protein Dbp5. Here we report that Dbp5 functions as an RNP remodeling protein to displace the RNA-binding protein Nab2 from RNA. Strikingly, the ADP-bound form of Dbp5 and not ATP hydrolysis is required for RNP remodeling. In vivo studies with nab2 and dbp5 mutants show that a Nab2-bound mRNP is a physiological Dbp5 target. We propose that Dbp5 functions as a nucleotide-dependent switch to control mRNA export efficiency and release the mRNP from the NPC.

Status: Published Type: Journal Article | Research Support, N.I.H., Extramural PubMed ID: 18082609

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DBP5 GLE1 KAP104 NAB2 PAB1
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