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Insertional mutagenesis in yeasts using T-DNA from Agrobacterium tumefaciens
Paul Bundock1, Haico van Attikum, Amke den Dulk-Ras
1Institute for Molecular Plant Sciences, Wassenaarseweg 64, 2333 AL Leiden, The Netherlands. bundock@rulbim.leidenuniv.nl
Yeast (Chichester, England)
|March 29, 2002
Summary
Agrobacterium tumefaciens T-DNA can be used for insertional mutagenesis in yeast. This method shows no bias for specific integration sites, enabling the isolation of novel mutations for yeast gene discovery.
Area of Science:
- Microbiology
- Molecular Biology
- Genetics
Background:
- Insertional mutagenesis is crucial for identifying new mutations.
- Agrobacterium tumefaciens T-DNA facilitates gene transfer in plants, yeasts, and fungi.
- Targeted gene insertion in yeast requires unbiased integration sites.
Purpose of the Study:
- To evaluate the potential of Agrobacterium tumefaciens T-DNA for unbiased insertional mutagenesis in Saccharomyces cerevisiae.
- To determine if T-DNA integration exhibits preference for specific genomic locations in yeast.
Main Methods:
- Analysis of 54 Saccharomyces cerevisiae strains with integrated T-DNA copies.
- Determination of T-DNA integration site positions within the S. cerevisiae genome.
- Identification of genes with disrupted coding regions.
Main Results:
- T-DNA integration in yeast showed no significant preference for particular DNA sequences or genomic regions.
- Insertions were identified in the coding regions of 13 non-essential S. cerevisiae genes.
- Genes confirmed as non-essential for haploid growth on minimal medium include YGR125w, YDR250c, and YGR141w.
Conclusions:
- Agrobacterium tumefaciens T-DNA is a suitable mobile DNA element for insertional mutagenesis in yeasts.
- The unbiased integration of T-DNA facilitates the generation of comprehensive yeast mutation libraries.
- This approach aids in the discovery of novel gene functions and essentiality in yeast.