Cited by 208Genetics and Neurodevelopmental DisordersRNA and protein synthesis mechanismsRNA Research and Splicing

A novel function for fragile X mental retardation protein in translational activation

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Bechara, Elias G, Didiot, Marie Cecile, Melko, Mireille, Davidovic, Laetitia, Bensaid, Mounia, Martin, Patrick, Castets, Marie, Pognonec, Philippe +3 more·2009·PLoS Biology

Abstract

Fragile X syndrome, the most frequent form of inherited mental retardation, is due to the absence of Fragile X Mental Retardation Protein (FMRP), an RNA-binding protein involved in several steps of RNA metabolism. To date, two RNA motifs have been found to mediate FMRP/RNA interaction, the G-quartet and the "kissing complex," which both induce translational repression in the presence of FMRP. We show here a new role for FMRP as a positive modulator of translation. FMRP specifically binds Superoxide Dismutase 1 (Sod1) mRNA with high affinity through a novel RNA motif, SoSLIP (Sod1 mRNA Stem Loops Interacting with FMRP), which is folded as three independent stem-loop structures. FMRP induces a structural modification of the SoSLIP motif upon its interaction with it. SoSLIP also behaves as a translational activator whose action is potentiated by the interaction with FMRP. The absence of FMRP results in decreased expression of Sod1. Because it has been observed that brain metabolism of FMR1 null mice is more sensitive to oxidative stress, we propose that the deregulation of Sod1 expression may be at the basis of several traits of the physiopathology of the Fragile X syndrome, such as anxiety, sleep troubles, and autism.

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Authors
Bechara, E. G., Didiot, M. C., Melko, M., Davidovic, L., Bensaid, M., Martin, P., Castets, M., Pognonec, P., Khandjian, E. W., Moine, H., & Bardoni, B.
Affiliations
Centre National de la Recherche Scientifique (FR)
Corresponding author
Bardoni, Barbara
Venue
PLoS Biology
Published
2009-01-20
Volume
7
Issue
1
Pages
e1000016
ISSN
  • 1544-9173 (ISSN-L)
  • 1545-7885
OpenAlex
W2077205550
Cited by
206
References
39
Citations by year
2026: 2 · 2025: 5 · 2024: 7 · 2023: 7 · 2022: 15 · 2021: 16 · 2020: 13 · 2019: 9 · 2018: 15 · 2017: 13 · 2016: 10 · 2015: 19 · 2014: 11 · 2013: 10 · 2012: 19
FWCI
10.53
Type
journal article
Language
en
Open access
Locations
  • PLoS Biology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
  • Agence Nationale de la Recherche
  • Institut National de la Santé et de la Recherche Médicale
  • Centre National de la Recherche Scientifique
  • Centre Hospitalier Universitaire de Nice
  • Canadian Institutes of Health Research
Topics
  • 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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
Keywords
FMRP, fragile X syndrome, translational activation, superoxide dismutase 1, RNA-binding proteins, RNA folding, protein synthesis inhibition, oxidative stress, autism spectrum disorder, anxiety, sleep disorders
MeSH terms
Superoxide Dismutase-1, Animals, Binding Sites, Brain, Fragile X Syndrome, Gene Expression Regulation, Humans, Mice, Mutant Strains, Polyribosomes, RNA, Messenger, Superoxide Dismutase, Protein Biosynthesis, Mice, Fragile X Mental Retardation Protein, Fragile X Messenger Ribonucleoprotein 1

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