Formation of ARS-Independent Miniplasmids upon Transformation of Yeast Pichia methanolica with DNA Molecules Containing “Transforming” and “Nontransforming” Genes

Formation of ARS-Independent Miniplasmids upon Transformation of Yeast Pichia methanolica with... In the study of transforming DNA molecules in cells of the methylotrophic yeast Pichia methano-lica, it was found that the efficiency of transformation and the possibility of autonomous replication of hybrid plasmids and miniplasmids consisting of only transforming gene (Trg) sequences do not depend on the presence of ARS sequences with the canonical structure, such as 2 μm DNA in the yeast Saccharomyces cerevisiae. Data supported a suggestion about the existence of the relationship between gene transforming activity and its ability for replication and transcription. The efficiency of vector activity of Trg is not sufficient to provide the transformation of other sequences of transforming DNA (tDNA). The loss of nonselected sequences of tDNA observed upon transformation is the result of rearrangements and deletions and is associated with the activity of cellular systems involved in nucleic acid metabolism. Miniplasmids similar in structure were shown to differ in their stability in independent transformants. The rate of loss of autonomously replicating plasmids strongly varied (from 1 to 99%) under nonselective conditions and nearly did not depend on plasmid structure. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

Formation of ARS-Independent Miniplasmids upon Transformation of Yeast Pichia methanolica with DNA Molecules Containing “Transforming” and “Nontransforming” Genes

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2002 by MAIK “Nauka/Interperiodica”
Subject
Biomedicine; Human Genetics
ISSN
1022-7954
eISSN
1608-3369
D.O.I.
10.1023/A:1021186725203
Publisher site
See Article on Publisher Site

Abstract

In the study of transforming DNA molecules in cells of the methylotrophic yeast Pichia methano-lica, it was found that the efficiency of transformation and the possibility of autonomous replication of hybrid plasmids and miniplasmids consisting of only transforming gene (Trg) sequences do not depend on the presence of ARS sequences with the canonical structure, such as 2 μm DNA in the yeast Saccharomyces cerevisiae. Data supported a suggestion about the existence of the relationship between gene transforming activity and its ability for replication and transcription. The efficiency of vector activity of Trg is not sufficient to provide the transformation of other sequences of transforming DNA (tDNA). The loss of nonselected sequences of tDNA observed upon transformation is the result of rearrangements and deletions and is associated with the activity of cellular systems involved in nucleic acid metabolism. Miniplasmids similar in structure were shown to differ in their stability in independent transformants. The rate of loss of autonomously replicating plasmids strongly varied (from 1 to 99%) under nonselective conditions and nearly did not depend on plasmid structure.

Journal

Russian Journal of GeneticsSpringer Journals

Published: Oct 13, 2004

References

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