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Genetic Screen for Identification of Multicopy Suppressors in Schizosaccharomyces pombe
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Schizosaccharomyces pombe rsm1 genetically interacts with spmex67, which is involved in mRNA export

Jin Ho Yoon1

  • 1Division of Biology, College of Natural Sciences, Kangnung National University, Gangneung 210-702, Korea. jhoyoon@kangnung.ac.kr

Journal of Microbiology (Seoul, Korea)
|September 11, 2004
PubMed

Insights

Researchers identified a new gene, rsm1, crucial for mRNA export in yeast. Its absence causes RNA buildup in the nucleus, and combined with another mutation, leads to cell death, highlighting rsm1's essential role in nuclear mRNA export.

Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • Investigating genes functionally linked to spmex67 for mRNA export.
  • Previous isolation of three synthetic lethal mutants in Schizosaccharomyces pombe.

Purpose of the Study:

  • To identify novel genes involved in mRNA export.
  • To characterize the function of the newly identified rsm1 gene.

Main Methods:

  • Complementation of growth defects in synthetic lethal mutants.
  • Gene deletion and analysis of poly(A)+ RNA accumulation.
  • Investigating synthetic lethality between rsm1 and spmex67 mutants.

Main Results:

  • A novel gene, rsm1, was identified and encodes a protein with a RING finger domain.
  • The deltarsm1 null mutant exhibits slight nuclear poly(A)+ RNA accumulation.
  • The double mutant deltarsm1 and deltaspmex67 shows synthetic lethality and a severe mRNA export defect.

Conclusions:

  • The rsm1 gene plays a role in nuclear mRNA export.
  • rsm1 acts in the same pathway as spmex67 for efficient mRNA export.

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