Dihydrofolate Reductase in Pediococcus cerevisiae Strains Susceptible and Resistant to Amethopterin

Author:

Mandelbaum-Shavit Frederika1,Grossowicz Nathan1

Affiliation:

1. Department of Bacteriology, The Hebrew University, Hadassah Medical School, Jerusalem, Israel

Abstract

A mutant strain of Pediococcus cerevisiae was obtained which had 1,000-fold greater resistance to amethopterin than the P. cerevisiae /PteGlu strain. The dihydrofolate reductase level of the mutant was about 60-fold higher than that of the parent. The mutant accumulated folate, though less efficiently than its parent.

Publisher

American Society for Microbiology

Subject

Infectious Diseases,Pharmacology (medical),Pharmacology

Reference19 articles.

1. Crystalline dihydropteroylglutamic acid;Blakley R. L.;Nature (London),1960

2. Purification and properties of dihydrofolate reductase from an amethopterin-resistant strain of Streptococcus faecium;D'Souza L.;Biochemistry,1972

3. Dihydrofolate reductase and thymidylate synthetase in strains of Streptococcus faecium resistant to pyrimethamine, chlorguanide triazine, trimethoprim and amethopterin;Freisheim J. H.;Arch. Biochem. Biophys.,1972

4. The association of increased dihyrofolate reductase with amethopterin resistance in mouse leukemia;Friedkin M.;Cancer Res.,1962

5. Dihydrofolate reductase from amethopterin-resistant Lactobacillus casei;Gundersen L. E.;Biochemistry,1972

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