Cited by 516Neuroscience and Neuropharmacology ResearchGenetics and Neurodevelopmental DisordersRNA and protein synthesis mechanisms

Elongation Factor 2 and Fragile X Mental Retardation Protein Control the Dynamic Translation of Arc/Arg3.1 Essential for mGluR-LTD

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Park, Sungjin, Park, Joo Min, Kim, Sangmok, Kim, Jin-Ah, Shepherd, Jason D., Smith-Hicks, Constance L., Chowdhury, Shoaib, Kaufmann, Walter +5 more·2008·Neuron

Abstract

Group I metabotropic glutamate receptors (mGluR) induce long-term depression (LTD) that requires protein synthesis. Here, we demonstrate that Arc/Arg3.1 is translationally induced within 5 min of mGluR activation, and this response is essential for mGluR-dependent LTD. The increase in Arc/Arg3.1 translation requires eEF2K, a Ca(2+)/calmodulin-dependent kinase that binds mGluR and dissociates upon mGluR activation, whereupon it phosphorylates eEF2. Phospho-eEF2 acts to slow the elongation step of translation and inhibits general protein synthesis but simultaneously increases Arc/Arg3.1 translation. Genetic deletion of eEF2K results in a selective deficit of rapid mGluR-dependent Arc/Arg3.1 translation and mGluR-LTD. This rapid translational mechanism is disrupted in the fragile X disease mouse (Fmr1 KO) in which mGluR-LTD does not require de novo protein synthesis but does require Arc/Arg3.1. We propose a model in which eEF2K-eEF2 and FMRP coordinately control the dynamic translation of Arc/Arg3.1 mRNA in dendrites that is critical for synapse-specific LTD.

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Crossref · 10.1016/j.neuron.2008.05.023

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  • Translation of Arc mRNA is enhanced during and crucial for mGluR-dependent LTD.

    “Translation of Arc mRNA is enhanced during, and crucial for, mGluR-dependent LTD59,60.”
  • In Fmr1 knockout mice, dynamic translation of Arc mRNA in response to stimulation is impaired, and basal Arc protein level in dendrites is elevated.

    “In Fmr1 knockout mice, the dynamic translation of Arc mRNA in response to stimulation is impaired59,61, and the basal level of the Arc protein in dendrites is elevated61.”
  • Under physiological conditions, NMDAR-dependent activation of eEF2K results in inactivation (phosphorylation) of eEF2, leading to the blockade of the elongation phase of protein synthesis and thus inhibition of protein translation.

    “Under physiological conditions, NMDAR-dependent activation of eEF2K results in inactivation (phosphorylation) of eEF2 leading to the blockade of the elongation phase of protein synthesis and thus inhibition of protein translation 166, 167.”

    From Mechanisms of ketamine action as an antidepressant (2018) · cites this paper as [167]

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Authors
Park, S., Park, J. M., Kim, S., Kim, J.-A., Shepherd, J. D., Smith-Hicks, C. L., Chowdhury, S., Kaufmann, W., Kuhl, D., Ryazanov, A. G., Huganir, R. L., Linden, D. J., & Worley, P. F.
Affiliations
  • Johns Hopkins University (US)
  • Massachusetts Institute of Technology (US)
  • Freie Universität Berlin (DE)
  • University of Medicine and Dentistry of New Jersey (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
Worley, Paul F.
Venue
Neuron
Publisher
Elsevier BV
Published
2008-07
Volume
59
Issue
1
Pages
70-83
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2100699923
Cited by
516
References
59
Citations by year
2026: 7 · 2025: 9 · 2024: 15 · 2023: 18 · 2022: 18 · 2021: 35 · 2020: 35 · 2019: 29 · 2018: 30 · 2017: 36 · 2016: 31 · 2015: 32 · 2014: 30 · 2013: 30 · 2012: 43
FWCI
17.01
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute of Mental Health (MH053608, MH068830, MH51106)
  • National Institute on Aging (AG019890, GM057300)
  • FRAXA Research Foundation
  • National Institute of Development Administration (DA00266)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
Keywords
Arc/Arg3.1, eEF2K, elongation factor 2, FMRP, group I metabotropic glutamate receptors, long-term depression, translational regulation, dendritic protein synthesis, Fmr1 knockout mice, calcium/calmodulin-dependent protein kinase
MeSH terms
Animals, Animals, Newborn, Cells, Cultured, Cycloheximide, Cytoskeletal Proteins, Dose-Response Relationship, Radiation, Electric Stimulation, Gene Expression Regulation, Hippocampus, Male, Models, Biological, Nerve Tissue Proteins, Neurons, Protein Synthesis Inhibitors, Protein Biosynthesis, Long-Term Potentiation, Receptors, AMPA, Mice, Knockout, Patch-Clamp Techniques, Excitatory Amino Acid Agents, Excitatory Postsynaptic Potentials, Peptide Elongation Factor 2, Protein Transport, Mice, Fragile X Messenger Ribonucleoprotein 1, In Vitro Techniques

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