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G·U base pairing motifs in long non-coding RNAs.

Karina Belen Sabalette1, Liubov Makarova1, Marco Marcia1

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Long non-coding RNAs (lncRNAs) utilize G·U base pairs for structural organization and functional roles. This study catalogs G·U pair distribution in lncRNAs, aiding future research into their mechanisms.

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G·U wobblePseudoknotsRNA conservationTriple helixlncRNA functional domainslncRNA protein interactionslncRNA structurenon canonical watson crick interaction

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Area of Science:

  • Molecular Biology
  • Genetics
  • RNA Biology

Background:

  • Long non-coding RNAs (lncRNAs) are crucial regulators of gene expression linked to various diseases.
  • Understanding lncRNA structure is key to deciphering their complex molecular functions.
  • Non-canonical base pairs, like G·U, are increasingly recognized for their structural and functional importance in RNA.

Purpose of the Study:

  • To systematically analyze the distribution and structural context of G·U base pairs in medically relevant lncRNAs.
  • To compare G·U base pair properties in lncRNAs with those in other RNA types (rRNAs, tRNAs, ribozymes, riboswitches).
  • To explore the role of G·U base pairs in lncRNA-protein/miRNA interactions and tertiary structure formation.

Main Methods:

  • Selection of prototypical and medically relevant lncRNAs with known secondary structures.
  • Cataloging and analysis of G·U base pair occurrences and their surrounding structural environments.
  • Comparative analysis of G·U base pair properties across different RNA classes.

Main Results:

  • Identified and cataloged the distribution of G·U base pairs within the selected lncRNA set.
  • Compared lncRNA G·U pair characteristics to those found in rRNAs, tRNAs, ribozymes, and riboswitches.
  • Highlighted potential roles of G·U pairs in lncRNA-biomolecule interactions and tertiary folding.

Conclusions:

  • G·U base pairs are prevalent and structurally significant in lncRNAs, influencing their interactions and folding.
  • The study identifies novel, G·U-rich regions in lncRNAs warranting further functional investigation.
  • This work provides a foundation for a deeper understanding of lncRNA structure-function relationships and disease relevance.