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Stimulation of acid phosphatase induction in Saccharomyces cerevisiae by electrochemical modulation of effector concentration
Author(s) -
Haruyama Tetsuya,
Kobatake Eiry,
Ikariyama Yoshihito,
Aizawa Masuo
Publication year - 1993
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260420708
Subject(s) - effector , saccharomyces cerevisiae , phosphate , phosphatase , electrochemistry , polymer , conductive polymer , acid phosphatase , biophysics , chemistry , yeast , biochemistry , biology , phosphorylation , enzyme , electrode , organic chemistry
A novel modulating method of the expression of Saccharomyces PHO 5 gene, responsible for acid phosphatase (APase), is proposed. The method is based on electrochemical modulation of an effector (inorganic phosphate) concentration, as the gene expression is initiated below a threshold concentration of phosphate and is terminated above the threshold value. By positioning the yeast in the close neighborhood of a conducting polymer, the authors show the effectiveness of the electrochemical approach toward PHO 5 induction. Based on the approach, phosphate concentration is easily modulated at the boundary concentration by taking advantage of anion doping–undoping at a conducting polymer and the resulting anion localization–delocalization in the polymer, as the local enrichment of phosphate in the polymer results in the lowering of phosphate in the vicinity of polypyrrole. External phosphate concentration is thus electrochemically modulated when the conducting polymer is positioned in the close neighborhood of the yeast cells; thereby the PHO gene is induced. Here an electrochemical approach for the APase expression as a strategy of selective induction of specific genetic information is described. © 1993 John Wiley & Sons, Inc.