The first case of a +1 "extrageneic" frameshift suppressor (MF1), mapping in the yeast mitochondrial 15S rRNA gene is reported. The suppressor was identified by genetic analyses in a leaky mitochondrial oxil frameshift mutant and the respective wild-type strain 777-3A of the yeast S. cerevisiae. Thi
A mitochondrial frameshift suppressor maps in the tRNASer-var1region of the mitochondrial genome of the yeastS. cerevisiae
✍ Scribed by Brigitte Weiss-Brummer; Hajime Sakai; Alexander Hüttenhofer
- Publisher
- Springer-Verlag
- Year
- 1989
- Tongue
- English
- Weight
- 729 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0172-8083
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✦ Synopsis
A polypeptide chain-terminating mutation (M5631) previously has been shown to be a +1T insertion in the yeast mitochondrial gene oxi1, coding for subunit II of the cytochrome c oxidase. A spontaneously arisen frameshift suppressor (mfs-1) that is mitochondrially inherited suppresses this mutation to a considerable extent. The suppressor mutation was mapped by genetic and molecular analyses in the mitochondrial tRNASer-var1 region of the mitochondrial genome of the yeast S. cerevisiae. Genetic analyses show that the suppressor mfs-1 does not suppress other known mitochondrial frameshift mutations, or missense and nonsense mutations.
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