Overexpression of the yeast HAM1 gene prevents 6-N-hydroxylaminopurine mutagenesis in Escherichia coli.

S G Kozmin; P Leroy; Y I Pavlov

doi:10.18388/abp.1998_4202

Overexpression of the yeast HAM1 gene prevents 6-N-hydroxylaminopurine mutagenesis in Escherichia coli.

S G Kozmin Department of Genetics, Sankt-Petersburg State University, Russia.;
P Leroy
Y I Pavlov

DOI: https://doi.org/10.18388/abp.1998_4202

Abstract

The base analogue 6-N-hydroxylaminopurine (HAP) is a potent mutagen in a variety of prokaryotic and eukaryotic organisms. Mutations in the yeast ham1 gene render the cells hypersensitive to the mutagenic effect of HAP. We have found that this gene has homologues in a variety of organisms from bacteria to man. We have overexpressed yeast Ham1p in E. coli. We demonstrate that under conditions when this protein constitutes approximately 30% of cellular protein, the host strain is protected both from toxic and mutagenic effects of HAP. This result indicates that sole Ham1p activity might be sufficient for destruction of HAP or its metabolites in bacterial cells.

Published

1998-09-30

Issue

Vol. 45 No. 3 (1998)

Section

Articles

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