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Related Experiment Videos

Mis-splicing yields circular RNA molecules

C Cocquerelle1, B Mascrez, D Hétuin

  • 1Unité 124 INSERM, Institut de Recherches sur le Cancer, Lille, France.

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
|January 1, 1993
PubMed
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Researchers discovered novel circular RNA molecules derived from human ets-1 pre-mRNA. These stable, cytoplasmic transcripts represent the first known instance of circular RNA processing from nuclear pre-mRNA in eukaryotes, offering new insights into gene expression and splicing.

Area of Science:

  • Molecular Biology
  • RNA Biology
  • Genetics

Background:

  • Novel human ets-1 transcripts with inverted exon order were previously identified.
  • Splicing of these exons occurred in pairs using genuine splice sites, despite the altered order.

Purpose of the Study:

  • To determine the structure of these novel ets-1 transcripts.
  • To investigate their cellular localization and stability.
  • To establish if they represent a new class of RNA molecules.

Main Methods:

  • Analysis of novel human ets-1 transcripts.
  • Determination of transcript structure.
  • Cellular localization studies.

Main Results:

  • The novel transcripts were identified as circular RNA molecules.

Related Experiment Videos

  • These circular RNAs contain exons in their original genomic order.
  • The transcripts are stable and found in the cell cytoplasm.
  • This represents the first reported case of circular RNA processing from nuclear pre-mRNA in eukaryotes.

    • Conclusions:

    • Circular RNA molecules are processed from nuclear pre-mRNA in eukaryotes.
    • These findings suggest a novel mechanism of gene expression.
    • The study provides new clues regarding the intricacies of the RNA splicing mechanism.