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A new specific DNA endonuclease activity in yeast mitochondria
B Sargueil1, A Delahodde, D Hatat
1Laboratoire de Génétique Moléculaire CNRS UA 1302, Paris, France.
Molecular & General Genetics : MGG
|February 1, 1991
Abstract:
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.