External K+ affects the internal acidification caused by the addition of glucose to yeast cells.
In glucose-grown cells of Saccharomyces cerevisiae, collected during the stationary phase of growth, the addition of K+ to the external medium reversed glucose-induced internal acidification in 2 min. However, in ethanol-grown cells external K+ did not reverse the effect of glucose even after 20 min. The presence or absence of external K+ did not alter the modification of trehalase and fructose-1,6-bisphosphatase induced by glucose. It is concluded that transient acidification may be sufficient to cause the associated transient increase in cAMP.
Valle
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Departamento Interfacultativo de Bioquímica, Universidad de Oviedo, Spain.
Bergillos
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Ramos
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D001565:Benzoates / Q000378:metabolism; D019817:Benzoic Acid; D006597:Fructose-Bisphosphatase / Q000378:metabolism; D005947:Glucose / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D011188:Potassium / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000254:growth & development / Q000378:metabolism*; D014198:Trehalase / Q000378:metabolism
D001565:Benzoates; D019817:Benzoic Acid; D006597:Fructose-Bisphosphatase; D014198:Trehalase; D005947:Glucose; D011188:Potassium