NDLI: Retinoic acid-gated sequence-specific translational control by RARα

Content Provider	PubMed Central
Author	Poon, Michael M. Chen, Lu
Abstract	Retinoic acid (RA) plays important roles in development by modulating gene transcription through nuclear receptor activation. Increasing evidence supports a role for RA and RA receptors (RARs) in synaptic plasticity in the brain. We have recently reported that RA mediates a type of homeostatic synaptic plasticity through activation of dendritic protein synthesis, a process that requires dendritically localized RARα and is independent of transcriptional regulation. The molecular basis of this translational regulation by RA/RARα signaling, however, is unknown. Here we show that RARα is actively exported from the nucleus. Cytoplasmic RARα acts as an RNA-binding protein that associates with a subset of mRNAs, including dendritically localized glutamate receptor 1 (GluR1) mRNA. This binding is mediated by the RARα carboxyl terminal F-domain and specific sequence motifs in the 5′UTR of the GluR1 mRNA. Moreover, RARα association with the GluR1 mRNA directly underlies the translational control of GluR1 by RA: RARα represses GluR1 translation, while RA binding to RARα reduces its association with the GluR1 mRNA and relieves translational repression. Taken together, our results demonstrate a ligand-gated translational regulation mechanism mediated by a non-genomic function of RA/RARα signaling.
Related Links	http://dx.doi.org/10.1073/pnas.0807740105
Ending Page	20308
Page Count	6
Starting Page	20303
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	51
Volume Number	105
Language	English
Publisher	National Academy of Sciences
Publisher Date	2008-12-23
Access Restriction	Open
Rights Holder	National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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Correction for Poon and Chen, Retinoic acid-gated sequence-specific translational control by RARα

Retinoic acid induces proteasome-dependent degradation of retinoic acid receptor α (RARα) and oncogenic RARα fusion proteins

Retinoic acid regulates RARα-mediated control of translation in dendritic RNA granules during homeostatic synaptic plasticity

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