The RNA binding protein FMRP: new connections and missing links
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Updated: Sep 23, 2026

Identification of Footprints of RNA:Protein Complexes via RNA Immunoprecipitation in Tandem Followed by Sequencing (RIPiT-Seq)
Published on: July 10, 2019
Céline Schaeffer1, Mélanie Beaulande, Chantal Ehresmann
1UPR 9002, Institut de Biologie Moléculaire et Cellulaire, 15, rue René-Descartes, 67084 Strasbourg cedex, France.
Abstract:
The loss of the fragile X mental retardation protein (FMRP) is responsible for the most common cause of inherited mental retardation called the fragile X syndrome. FMRP is suspected to participate in the synaptic plasticity of neurons by acting on posttranscriptional control of gene expression. FMRP is an RNA binding protein that associates with mRNAs together with other proteins to form large ribonucleoprotein complexes. These complexes are proposed to participate in the transport, localization and translation of target mRNAs. Progress has been made recently in the identification of the mRNAs and the proteins present in these complexes and a possible connection with the micro-RNA dependent regulatory pathway has been established.
Insights
Loss of fragile X mental retardation protein (FMRP) causes fragile X syndrome, a common inherited intellectual disability. FMRP binds mRNAs, forming complexes for neuronal gene regulation and synaptic plasticity.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Fragile X syndrome, the most common inherited intellectual disability, results from the loss of fragile X mental retardation protein (FMRP).
- FMRP is an RNA-binding protein implicated in synaptic plasticity and posttranscriptional gene control in neurons.
Purpose of the Study:
- To elucidate the role of FMRP in neuronal function.
- To identify the molecular mechanisms underlying FMRP's function in ribonucleoprotein complexes.
Main Methods:
- Identification of mRNAs and associated proteins within FMRP-containing ribonucleoprotein complexes.
- Investigation of potential links to micro-RNA mediated gene regulation.
Main Results:
- Recent progress in identifying specific mRNAs and proteins interacting with FMRP.
- Established a potential connection between FMRP complexes and micro-RNA pathways.
Conclusions:
- FMRP plays a crucial role in regulating gene expression at the posttranscriptional level.
- FMRP-containing ribonucleoprotein complexes are involved in mRNA transport, localization, and translation.
- The micro-RNA pathway may be a key component of FMRP's regulatory function in neurons.
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