Kinetics and regulation of fructose and glucose transport systems are responsible for fructophily in Zygosaccharomyces bailii

Article Abstract:

Sugar transport in Zygosaccharomyces bailii is carried out through 2 independent transporters, one for fructose and the other for fructose and glucose, and shows fructophilic behavior. transport of fructose is favored over that of glucose as the former inactivates the glucose transporter at high concentrations and utilizes it by competing with glucose. The fructose transporter also has higher capacity. Both transporters are partially inductive. Fructose is transported with a K(sub m) of 65.6 mM and a V (sub max) of 6.7 minimol/g/h for cells grown on 2% (w/v) fructose.

Physiological aspects, Yeast fungi, Yeasts (Fungi)

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Magnesium transport in Salmonella typhimurium: regulation of mgtA and mgtCB during invasion of epithelial and macrophage cells

Article Abstract:

Research was conducted to examine the regulation of MgtA and MgtB during the invasion of epithelial and macrophage cells in Salmonella typhimurium. Results revealed that the transcription of both transport systems increased due to inadequate Mg2+ during intravacuolar growth and cell invasion. This may indicate that strong Mg2+-dependent induction is unnecessary during the entry of eukaryotic cells.

Salmonella typhimurium

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