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RNA-seq03:21

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Probing Xist RNA Structure in Cells Using Targeted Structure-Seq.

Rui Fang1,2, Walter N Moss1, Michael Rutenberg-Schoenberg1,2

  • 1Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, Connecticut, United States of America.

Plos Genetics
|December 10, 2015
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Summary
This summary is machine-generated.

We developed Targeted Structure-Seq to map the structure of the Xist long non-coding RNA (lncRNA) in cells. This method revealed new functional and evolutionarily conserved structural elements within Xist.

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Area of Science:

  • Molecular Biology
  • Genetics
  • RNA Biology

Background:

  • Long non-coding RNAs (lncRNAs) like Xist regulate crucial cellular processes, including X-chromosome inactivation.
  • Understanding lncRNA structure is vital for modeling their function, evolution, and modularity.
  • Existing methods for RNA structure probing can be limited in scalability and target specificity.

Purpose of the Study:

  • To develop a novel method for probing RNA secondary structure within cells.
  • To investigate the structural conformation of the full-length Xist lncRNA.
  • To identify functional and conserved structural elements within Xist.

Main Methods:

  • Development of Targeted Structure-Seq, combining chemical probing with target-specific massively parallel sequencing.
  • Enrichment of sequencing signals from the Xist lncRNA for high-coverage analysis.
  • Application of the method to probe the full-length Xist RNA in its cellular context.

Main Results:

  • Targeted Structure-Seq provides a scalable and targeted approach for analyzing RNA conformation in cells.
  • The study revealed new models for functional elements within Xist, including the repeat A element.
  • Identification of novel, evolutionarily conserved structural elements in Xist, including one near the C repeats crucial for function.

Conclusions:

  • Targeted Structure-Seq is an effective tool for detailed structural analysis of lncRNAs in cells.
  • The findings provide new insights into the structure-function relationships of Xist.
  • The identified conserved structural elements highlight potential key regions for Xist regulation and evolution.