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KMID : 0364820120480020171
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Korean Journal of Microbiology
2012 Volume.48 No. 2 p.171 ~ p.174
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Effects of the Repression of sphpr1 Expression on Growth and mRNA Export in Fission Yeast
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Lee Hyun-Joo
Yoon Jin-Ho
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Abstract
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THOC1/Hpr1 is one subunit of THO complex that is an evolutionally conserved assembly involved in the mRNP
packaging and mRNA export during transcription elongation. In fission yeast Schizosaccharomyces pombe, an
ortholog (spHpr1) of THOC1/Hpr1 was identified based on sequence alignment. A deletion mutant in a diploid strain
was constructed by replacing one of spHpr1-coding region with a kanr
gene using one-step gene disruption method.
Tetrad analysis showed that the sphpr1 is essential for growth. Over-expression of sphpr1 from strong nmt1
promoter caused no defects of growth and mRNA export. However, repression of the sphpr1 expression resulted in
growth inhibition accompanied by accumulation of poly(A)+
RNA in the nucleus. These results suggest that spHpr1
is involved in mRNA export from the nucleus to cytoplasm.
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KEYWORD
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S. pombe, sphpr1, mRNA export, THO complex
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