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. 1985 Aug;4(8):2081–2085. doi: 10.1002/j.1460-2075.1985.tb03895.x

Suppressor mutations identify box9 as a central nucleotide sequence in the highly ordered structure of intron RNA in yeast mitochondria.

J Holl, G Rödel, R J Schweyen
PMCID: PMC554465  PMID: 2415358

Abstract

Data presented here lend support to the notion that RNA splicing in yeast mitochondria depends on the formation of hybrid structures involving the well-conserved intron sequences box9 and box2. Starting with the cis-dominant splicing-defective box2 mutant G2590, a G----A transition, we isolated a revertant having a mitochondrial second site suppressor mutation, which restores splicing competence in the presence of the original mutation. Sequence analysis reveals that the suppressor mutation is a C----T transition in box9(5' part). This second mutation compensates for the first one in box2 and restores a box2/box9(5') hybrid. Combined with previous data demonstrating an interaction of the adjacent sequence box9(3' part) with the upstream box9c sequence in intron 4, the central role of box9 in the formation of the intron 4, the central role of box9 in the formation of the intron 4 RNA high order structure becomes evident.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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