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J Bacteriol. 1963 November; 86(5): 966-970
Copyright © 1963, The Williams & Wilkins Company. All Rights Reserved.

COMPARISON OF THE ACTIVE TRANSPORT SYSTEMS FOR -THIOETHYL-D-GLUCOPYRANOSIDE AND MALTOSE IN SACCHAROMYCES CEREVISIAE

^a Department of Bacteriology, University of Wisconsin, Madison, Wisconsin

ABSTRACT

OKADA, HIROSUKE (University of Wisconsin, Madison), AND H. O. HALVORSON. Comparison of the active transport systems for -thioethyl-D-glucopyranoside and maltose in Saccharomyces cerevisiae. J. Bacteriol. 86:966–970. 1963.—Inducible systems for the active transport of both maltose and -thioethyl-D-glucopyranoside (-TEG) have been described in strains of Saccharomyces cerevisiae. The properties of induction of the -TEG-accumulating system were similar to other inducible systems in yeast: the differential rate of synthesis was constant, and induction was inhibited by amino acid analogues. At temperatures below 20 C, the temperature dependence of -TEG accumulation in induced cells was identical to that in facilitated diffusion. From a survey of various inducers, a coordinate induction of both active-transport systems was observed. These findings led to the conclusion that in active transport a common inducible enzyme is coupled to both the -TEG and maltose facilitated-diffusion systems.

¹ Present address: Department of Fermentation Technology, Faculty of Engineering, Osaka University, Higashinoda, Osaka, Japan.