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Related Experiment Videos

The odyssey of a regulated transcript.

J Vilardell1, P Chartrand, R H Singer

  • 1Department of Cell Biology, Albert Einstein College of Medicine, Bronx, New York 10461, USA.

RNA (New York, N.Y.)
|January 6, 2001
PubMed
Summary
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Regulated splicing and translation of Saccharomyces cerevisiae RPL30 transcripts are controlled by ribosomal protein L30. Uncapped transcripts initially bind U1 snRNP, then move to the cytoplasm, eventually degrading via nonsense-mediated decay.

Area of Science:

  • Molecular Biology
  • Gene Regulation
  • Yeast Genetics

Background:

  • The Saccharomyces cerevisiae RPL30 gene transcript exhibits regulated splicing and translation.
  • This regulation is mediated by a structure that interacts with its product, ribosomal protein L30.

Purpose of the Study:

  • To investigate the in vivo fate of regulated RPL30 transcripts.
  • To understand the molecular mechanisms governing RPL30 transcript processing and stability.

Main Methods:

  • In vivo tracking of RPL30 transcripts.
  • Analysis of transcript association with U1 snRNP, ribosomal protein L30, and ribosomes.
  • Assessment of translational engagement and decay pathways.

Main Results:

Related Experiment Videos

  • RPL30 transcripts initially enter the splicing pathway, forming stable complexes with U1 snRNP.
  • A significant portion of unspliced transcripts are found in the cytoplasm, largely bound by L30 and not translated.
  • Uncapped transcripts eventually release L30, associate with ribosomes, and undergo nonsense-mediated decay.

Conclusions:

  • Ribosomal protein L30 autoregulation involves a complex interplay between splicing, cytoplasmic localization, translation, and decay.
  • The U1 snRNP interaction and cytoplasmic sequestration serve as critical checkpoints in RPL30 mRNA fate.
  • Nonsense-mediated decay acts as a final degradation pathway for unspliced RPL30 transcripts.