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Effect of thiamin on cordycepin sensitivity in Saccharomyces cerevisiae
Author(s) -
Iwashima A.,
Kawasaki Y.,
Nosaka K.,
Nishimura H.
Publication year - 1992
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(92)81367-u
Subject(s) - cordycepin , saccharomyces cerevisiae , yeast , deoxyadenosine , mutant , chemistry , adenosine , biochemistry , gene
The sensitivity of Saccharomyces cerevisiae to the antibiotic cordycepin (3′‐deoxyadenosine) was found to be decreased by the addition of thiamin to the growth medium. A thiamin transport mutant of S. cerevisiae was also found to be resistant to the growth inhibitory effect of cordycepin. Not only the thiamin uptake but also adenosine uptake by this mutant cell was markedly reduced compared to those by the parent yeast cells. This strongly suggested that cordycepin, an analog of adenosine, is virtually taken up by the thiamin transport system of growing yeast cells; thus the drug sensitivity is decreased by the presence of thiamin in the growth medium.