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Promoter-trapping in Saccharomyces cerevisiae by radiation-assisted fragment insertion.
Nucleic Acids Res. 30:e136 (2002)
Non-homologous insertion (NHI) of DNA fragments into genomic DNA is a method widely used in insertional mutagenesis screens. In the yeast Saccharomyces cerevisiae, the efficiency of NHI is very low. Here we report that its efficiency can be increased by gamma-irradiation of recipient cells at the time of transformation. Radiation-assisted NHI depends on YKU70, but its efficiency is not improved by inactivation of RAD5 or RAD52. In a pilot study, we generated 102 transformant clones expressing a lacZ reporter gene under standard conditions (30degreesC, rich medium). The site of insertion was determined in a subset of eight clones in which lacZ expression was altered by UV-irradiation. A comparison with published data revealed that three of the eight genes identified in our screen have not been targeted by large-scale transposon-based insertion screens. This suggests that radiation-assisted NHI offers a more homogeneous coverage of the genome than methods relying on transposons or retroviral elements.
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6.373
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11
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
DOUBLE-STRAND BREAKS; DNA-DAMAGING AGENTS; ILLEGITIMATE RECOMBINATION; GENE-EXPRESSION; YEAST-CELLS; INTEGRATION; MUTAGENESIS; GENOME; TRANSFORMATION; PATHWAY
Language
english
Publication Year
2002
HGF-reported in Year
0
ISSN (print) / ISBN
0305-1048
e-ISSN
1362-4962
Journal
Nucleic Acids Research
Quellenangaben
Volume: 30,
Issue: 24,
Article Number: e136
Publisher
Oxford University Press
Reviewing status
Peer reviewed
Institute(s)
Institute of Molecular Radiation Biology (IMS)
PSP Element(s)
FE 70421
PubMed ID
12490727
WOS ID
WOS:000180465600001
Erfassungsdatum
2002-11-13