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Related Experiment Videos

A mouse thymidylate synthase pseudogene derived from an aberrantly processed RNA molecule.

D W Li1, L F Johnson

  • 1Department of Biochemistry, Ohio State University, Columbus 43210.

Gene
|October 30, 1989
PubMed
Summary

Researchers identified a mouse thymidylate synthase (TS) processed pseudogene with unusual features, suggesting it originated from aberrantly spliced and polyadenylated TS mRNA. This pseudogene provides insights into gene expression regulation.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Bioinformatics

Background:

  • Thymidylate synthase (TS) is a crucial enzyme in DNA synthesis.
  • Processed pseudogenes are non-functional DNA copies of mRNA, lacking introns and regulatory elements.
  • Understanding pseudogene formation can shed light on gene expression and regulation.

Purpose of the Study:

  • To clone and analyze a mouse thymidylate synthase (TS) processed pseudogene.
  • To investigate the origin and unusual features of the identified TS pseudogene.
  • To explore the implications of aberrant splicing and polyadenylation in pseudogene formation.

Main Methods:

  • DNA cloning and sequencing of the mouse TS pseudogene.
  • Sequence comparison between the pseudogene, TS gene, and TS cDNA.

Related Experiment Videos

  • Analysis of intron sequences and alternative splicing sites.
  • S1-nuclease protection assays to detect alternative splicing in mouse cells.

    • Main Results:

    • A mouse TS processed pseudogene was identified, sharing high sequence identity with TS cDNA.
    • The pseudogene exhibited an unusually located poly(A) tail and retained intronic sequences.
    • An alternative 3' splice site in intron 5 of the TS gene was identified.
    • Approximately 10% of mouse TS mRNA utilized this alternative splice site.

    Conclusions:

    • The mouse TS pseudogene likely arose from aberrantly spliced and polyadenylated TS mRNA.
    • Aberrant splicing and polyadenylation contribute to the formation of processed pseudogenes.
    • The findings highlight the complexity of gene expression and the potential for non-canonical processing events.