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PMID: 3887134 Published · ppublish English Journal Article Research Support, U.S. Gov't, P.H.S.

Expression of the Escherichia coli dam methylase in Saccharomyces cerevisiae: effect of in vivo adenine methylation on genetic recombination and mutation.

Molecular and cellular biology ·Vol. 5 ·No. 4 ·1985-04-00 ·Pages 610-8

Hoekstra MF, Malone RE

Abstract

The Escherichia coli DNA adenine methylase (dam) gene has been introduced into Saccharomyces cerevisiae on a yeast-E. coli shuttle vector. Sau3AI, MboI, and DpnI restriction enzyme digests and Southern hybridization analysis indicated that the dam gene is expressed in yeast cells and methylates GATC sequences. Analysis of digests of total genomic DNA indicated that some GATC sites are not sensitive to methylation. The failure to methylate may reflect an inaccessibility to the methylase due to chromosome structure. The effects of this in vivo methylation on the processes of recombination and mutation in mitotic cells were determined. A small but definite general increase was found in the frequency of mitotic recombination. A similar increase was observed for reversion of some auxotrophic markers; other markers demonstrated a small decrease in mutation frequency. The effects on mutation appear to be locus (or allele) specific. Recombination in meiotic cells was measured and was not detectably altered by the presence of 6-methyladenine in GATC sequences.

MeSH Terms
Base Sequence DNA Repair DNA, Fungal/genetics Escherichia coli/enzymology,genetics Meiosis Methylation Methyltransferases/genetics Mitosis Mutation Recombination, Genetic Saccharomyces cerevisiae/genetics Site-Specific DNA-Methyltransferase (Adenine-Specific)
Chemicals
DNA, Fungal Methyltransferases Site-Specific DNA-Methyltransferase (Adenine-Specific)
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Hoekstra M F
Malone R E
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34 references, click to expand
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Article Info
Journal
Molecular and cellular biology
Abbr.
Mol Cell Biol
ISSN
0270-7306
DOI
10.1128/mcb.5.4.610-618.1985
Published
1985-04-00
Pages
610-8
Language
English
Region
United States
NLM ID
8109087
PMCID
PMC366761
Subset
IM
Grants
NIGMS NIH HHS · R01-GM 29172 · United States
External Links
PubMed source DOI: 10.1128/mcb.5.4.610-618.1985 PMC Full Text View journal details
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