title: A novel RNA-binding protein in neuronal RNA granules: regulatory machinery for local translation.
abstract: Local translation in neuronal dendrites is an important basis for long-term synaptic plasticity, and RNA granules in the dendrites are involved in the local translation. Here, we identify RNG105 (RNA granule protein 105), a novel RNA-binding protein, as a component of the RNA granules in dendrites of hippocampal neurons. The RNG105-localizing RNA granules contain mRNAs, the translational products of which play key roles in synaptic plasticity. RNG105 has an ability to repress translation both in vitro and in vivo, consistent with the finding that the RNA granule is translationally arrested in the basal conditions. Dissociation of RNG105 from the RNA granules is induced by BDNF, a growth factor responsible for synaptic plasticity. The RNG105 dissociation is coincident with the induction of local translation near the granules. These findings suggest that RNG105 is a translational repressor in the RNA granules and provide insight into the link between RNG105 dynamics and local translational regulation.
authors.affiliation: Structural Biology Center, National Institute of Genetics, School of Life Science, The Graduate University for Advanced Studies, Mishima, Shizuoka 411-8540, Japan. nshiina@lab.nig.ac.jp
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Shiina
authors.forename: Kazumi
authors.initials: K
authors.lastname: Shinkura
authors.forename: Makio
authors.initials: M
authors.lastname: Tokunaga
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D015153:Blotting, Western; D001921:Brain / Q000166:cytology* / Q000378:metabolism; D019208:Brain-Derived Neurotrophic Factor / Q000494:pharmacology; D018797:Cell Cycle Proteins; D002478:Cells, Cultured; D003001:Cloning, Molecular / Q000379:methods; D004268:DNA-Binding Proteins / Q000378:metabolism; D003712:Dendrites / Q000378:metabolism; D003952:Diagnostic Imaging / Q000379:methods; D000076122:Disks Large Homolog 4 Protein; D015870:Gene Expression / Q000502:physiology; D005786:Gene Expression Regulation / Q000502:physiology*; D049452:Green Fluorescent Proteins / Q000096:biosynthesis; D006801:Humans; D007150:Immunohistochemistry / Q000379:methods; D047468:Immunoprecipitation / Q000379:methods; D017403:In Situ Hybridization / Q000379:methods; D066298:In Vitro Techniques; D047908:Intracellular Signaling Peptides and Proteins / Q000378:metabolism; D008297:Male; D008565:Membrane Proteins / Q000378:metabolism; D008715:Methionine / Q000378:metabolism; D016253:Microscopy, Immunoelectron / Q000379:methods; D008869:Microtubule-Associated Proteins / Q000378:metabolism; D009474:Neurons / Q000378:metabolism* / Q000648:ultrastructure; D014176:Protein Biosynthesis; D012313:RNA / Q000378:metabolism*; D016601:RNA-Binding Proteins / Q000235:genetics / Q000378:metabolism / Q000502:physiology* / Q000648:ultrastructure; D051381:Rats; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods; D038601:Ribosomal Protein S6 / Q000378:metabolism; D013460:Sulfur Isotopes / Q000378:metabolism; D013737:Testis / Q000378:metabolism; D013997:Time Factors; D014157:Transcription Factors / Q000378:metabolism; D014162:Transfection / Q000379:methods; D014981:Xenopus; D029867:Xenopus Proteins / Q000235:genetics / Q000502:physiology
chemical_list: D019208:Brain-Derived Neurotrophic Factor; C486569:CAPRIN1 protein, Xenopus; D018797:Cell Cycle Proteins; D004268:DNA-Binding Proteins; D000076122:Disks Large Homolog 4 Protein; C501449:Dlg4 protein, rat; C491779:Elf4 protein, mouse; D047908:Intracellular Signaling Peptides and Proteins; C489787:MAP2 protein, rat; D008565:Membrane Proteins; D008869:Microtubule-Associated Proteins; D016601:RNA-Binding Proteins; D038601:Ribosomal Protein S6; C492186:Stau1 protein, rat; D013460:Sulfur Isotopes; D014157:Transcription Factors; D029867:Xenopus Proteins; D049452:Green Fluorescent Proteins; D012313:RNA; D008715:Methionine