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2-Deoxy-D-glucose resistant yeast with altered sugar transport activity
S Novak1, T D'Amore, G G Stewart
1Brewing Research Department, John Labatt Limited, London, Ont., Canada.
FEBS Letters
|August 20, 1990
Summary
A yeast mutant resistant to 2-deoxy-D-glucose exclusively uses high-affinity transport systems for glucose and maltose. This finding reveals derepression of these systems and aids in studying yeast sugar transport regulation.
Area of Science:
- * Molecular biology
- * Biochemistry
- * Yeast genetics
Background:
- * Saccharomyces cerevisiae utilizes both high and low affinity transport systems for glucose and maltose uptake.
- * Understanding these transport mechanisms is crucial for metabolic engineering and industrial applications of yeast.
Purpose of the Study:
- * To characterize a novel mutant of Saccharomyces cerevisiae exhibiting altered glucose and maltose transport.
- * To investigate the regulatory mechanisms underlying sugar transport in yeast.
Main Methods:
- * Isolation and characterization of a 2-deoxy-D-glucose resistant mutant.
- * Analysis of glucose and maltose transport kinetics (Vmax) in the mutant.
- * Comparison of transport system activity between wild-type and mutant yeast strains.
Main Results:
- * The 2-deoxy-D-glucose resistant mutant exclusively transported glucose and maltose via high-affinity systems.
- * A significant increase in Vmax values for high-affinity transport was observed, indicating derepression.
- * Low-affinity transport systems were undetectable in the mutant strain.
Conclusions:
- * The isolated mutant provides a valuable tool for dissecting yeast sugar transport regulation.
- * Derepression of high-affinity transport systems is a key characteristic of this mutant.
- * Further studies using this mutant can elucidate complex regulatory networks in yeast metabolism.