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Properties of the sugar carrier in baker’s yeast

IV. An asymmetric component of monosaccharide transport

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Abstract

The uptake by baker’s yeast of monosaccharides (d-arabinose,d-xylose,d-ribose,d-glucose,d-galactose) at very low concentrations (0.02–2mm) shows a distinct asymmetry, the apparent intracellular concentrations attaining values up to 85 times higher than in the medium. A practically irreversible binding inside the cell appears to be involved. The binding has an apparent activation energy of 11000 cal/mole. It is not affected by metabolic inhibitors but requires cell integrity for its occurrence. Some features of the binding suggest that the monosaccharides are partly incorporated into cell components, but whether the process is enzymic in nature remains unclear.

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Authors and Affiliations

  1. Laboratory for Cell Membrane Transport, Institute of Microbiology, Czechoslovak Academy of Sciences, Prague 4

    A. Kotyk & D. Michaljaničová

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  1. A. Kotyk
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  2. D. Michaljaničová
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Kotyk, A., Michaljaničová, D. Properties of the sugar carrier in baker’s yeast. Folia Microbiol 13, 212–220 (1968). https://doi.org/10.1007/BF02871036

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  • DOI: https://doi.org/10.1007/BF02871036

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