G-quartet-dependent recognition between the FMRP RGG box and RNA

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Updated: Sep 18, 2026

Sample Preparation for Mass Spectrometry-based Identification of RNA-binding Regions
10:52

Sample Preparation for Mass Spectrometry-based Identification of RNA-binding Regions

Published on: September 28, 2017

Andres Ramos1, David Hollingworth, Annalisa Pastore

  • 1National Institute for Medical Research, London NW7 1AA, UK.

RNA (New York, N.Y.)
|September 18, 2003
PubMed

Insights

Fragile X syndrome is linked to FMRP protein dysfunction. This study reveals how FMRP

Area of Science:

  • Molecular Biology
  • Neuroscience
  • Genetics

Background:

  • Fragile X syndrome, a common genetic cause of intellectual disability, results from reduced Fragile X Mental Retardation Protein (FMRP).
  • FMRP is an RNA-binding protein crucial for translational repression in neurons, impacting mRNA regulation.
  • The RGG box of FMRP is key for its interaction with RNA targets, specifically recognizing G-quartet structures.

Purpose of the Study:

  • To structurally characterize FMRP RGG box interactions with its RNA targets.
  • To investigate the structural basis of RNA recognition specificity by FMRP.
  • To explore the role of RNA structure and potential RNA:RNA interactions in RNP assembly.

Main Methods:

  • Structural characterization of three representative FMRP RNA targets in unbound and FMRP RGG box-bound states.
  • Analysis of RNA conformation and binding modes using biophysical techniques (details not specified in abstract).

Main Results:

  • Observed significant heterogeneity in the conformations of RNA targets and their binding modes with the FMRP RGG box.
  • Demonstrated that G-quartet formation can occur through intramolecular folding or RNA dimerization.
  • These structural variations suggest a basis for specific RNA recognition by FMRP.

Conclusions:

  • FMRP RGG box binding specificity is potentially linked to diverse RNA conformations and binding modes.
  • RNA dimerization-mediated G-quartet formation highlights the role of RNA:RNA interactions in complex formation.
  • Findings suggest RNA:RNA interactions are important for protein:RNA complex assembly and RNP biogenesis in neurons.

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