Author/Editor		Piškur, Jure
Title		Sensitivity of intergenic regions of yeast mitochondrial DNA to single-strand-specific nucleases
Type		članek
Source		FEBS Lett
Vol. and No.		Letnik 238, št. 2
Publication year		1988
Volume		str. 435-40
Language		eng
Abstract		The reactivity of mitochondrial DNA (mtDNA) sequences from Torulopsis glabrata and Saccharomyces cerevisiae towards single-strand-specific nucleases has been examined. AT-rich stretches located in intergenic sequences from both yeasts were cleaved by nucleases when the sequences were contained in supercoiled plasmid DNA. In particular ori/rep sequences from the mtDNA of S. cerevisiae were shown to be sensitive to the single-strand-specific nucleases. The locations of the sensitive sites were related to the organisation of the sequence domains of ori/rep and the superhelicity of the DNA, as well as the presence of particular sequences. It is proposed that distortions of the DNA duplex could be generated in mtDNA molecules in vivo and that these distortions may provide a substrate for enzymes involved in transmission, recombination and/or transcription of mtDNA.
Descriptors		CANDIDA DNA RESTRICTION ENZYMES DNA, FUNGAL DNA, MITOCHONDRIAL DNA, SUPERHELICAL DEOXYRIBONUCLEASES ENDONUCLEASES ETHIDIUM PLASMIDS SACCHAROMYCES CEREVISIAE