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Related Experiment Videos

The KlCYC1 gene, a downstream region for two differentially regulated transcripts.

M A Freire-Picos1, L J Lombardía-Ferreira, E Ramil

  • 1Facultad de Ciencias, Departamento de Biología Celular y Molecular, Universidad de La Coruña, Campus de La Zapateira s/n, 15071-La Coruña, Spain. mafreire@mail.udc.es

Yeast (Chichester, England)
|September 26, 2001
PubMed
Summary

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The KlCYC1 gene in Kluyveromyces lactis uses a unique transcription mechanism producing two mRNAs. This yeast gene

Area of Science:

  • Molecular Biology
  • Yeast Genetics
  • Gene Expression

Background:

  • KlCYC1 encodes cytochrome c in Kluyveromyces lactis.
  • This gene exhibits an uncommon transcription mechanism producing two distinct mRNAs.
  • The 3'-untranslated region (3'-UTR) plays a crucial role in mRNA processing.

Purpose of the Study:

  • To analyze the 3' sequence of KlCYC1 responsible for producing both mRNAs.
  • To investigate the conservation of the mRNA processing mechanism across yeast species.
  • To understand the growth phase-dependent regulation of 3'-UTR processing in K. lactis and S. cerevisiae.

Main Methods:

  • Sequence analysis of the KlCYC1 3'-UTR.
  • Functional analysis of KlCYC1 processing in both Kluyveromyces lactis and Saccharomyces cerevisiae.

Related Experiment Videos

  • Polyadenylation site mapping.

    • Main Results:

    • Identical major polyadenylation points (positions 698 and 1092) were identified in K. lactis and S. cerevisiae.
    • The cis-elements within the KlCYC1 3'-UTR direct a conserved yeast mRNA processing mechanism.
    • Growth phase-dependent regulation of 3'-UTR processing in K. lactis is lost when the gene is expressed in S. cerevisiae.

    Conclusions:

    • The mRNA 3'-processing mechanism directed by KlCYC1 cis-elements is conserved between K. lactis and S. cerevisiae.
    • Growth phase-dependent regulation of KlCYC1 3'-UTR processing is specific to K. lactis.
    • Understanding conserved and divergent gene regulation mechanisms in yeast is critical.