A new specific DNA endonuclease activity in yeast mitochondria
โ Scribed by Sargueil, B. ;Delahodde, A. ;Hatat, D. ;Tian, G. L. ;Lazowska, J. ;Jacg, C.
- Book ID
- 104694489
- Publisher
- Springer
- Year
- 1991
- Tongue
- English
- Weight
- 168 KB
- Volume
- 225
- Category
- Article
- ISSN
- 0026-8925
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โฆ Synopsis
Two group I intron-encoded proteins from the yeast mitochondrial genome have already been shown to have a specific DNA endonuclease activity. This activity mediates intron insertion by cleaving the DNA sequence corresponding to the splice junction of an intronless strain. We have discovered in mitochondrial extracts from the yeast strain 777-3A a new DNA endonuclease activity which cleaves the fused exon A3-exon A4 junction sequence of the CO XI gene.
๐ SIMILAR VOLUMES
A technique for conveniently radiolabeling DNA restriction endonuclease fragments to high specific activity is described. DNA fragments are purified from agarose gels directly by ethanol precipitation and are then denatured and labeled with the large fragment of DNA polymerase I, using random oligon