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  • H+-permeability  (1)
  • ion permeability  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Mercaptoethanol and dithiothreitol decrease the difference of electrochemical proton potentials across the yeast plasma and vacuoar membranes and activate their H+-ATPases (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 8 (1992), S. 589-598 
    Details
    ISSN: 0749-503X
    Keywords: Mercaptoethanol ; dithiothreitol ; plasmalemma ; tonoplast ; H+-ATPase ; H+-permeability ; yeast ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Mercaptoethanol and dithiothreitol (DTT) inhibited the acidification of external medium by by Saccharomyces Carlsbergensis cells and protoplasts during glucose oxidation. The inhibition was also observed when cells were incubated with mercaptoethanol or when mercaptoethanol and DTT were used to prepare protolasts. Experiments with S. carlsbergensis plasma membrene vesicles and vacuoles showed these thiol reagents to inhibitATP-dipendent generation of ΔpH and Em across plasma membrane vesicles and vacuoles but to activate their H+-ATPases. Mercaptoethanol and DTT are suggested to de-energize plasmalemma as well as tonoplast by increasing their H+-permeability and to disturb the cell ion homeostasis.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320080803
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  • 2
    Electronic Resource
    Electronic Resource
    Increase of anion and proton permeability of Saccharomyces carlsbergensis plasmalemma by n-alcohols as a possible cause of its de-energization (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 6 (1990), S. 311-318 
    Details
    ISSN: 0749-503X
    Keywords: Alcohol toxicity ; ion permeability ; plasma membrane ; H+-ATPase ; yeast ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The effect on n-alcohols on ATP-dependent generation of ΔpH and Em across the plasma membrane vesicles of the yeast Saccharomyces carlsbergenesis was investigated. The alcohols were shown to collapse ΔpH and Em in the order C2〈C3〈C4〈C5≤C6≥C7〉C8〉C11, the dissipation of Em being more pronounced. Inhibition of the plasmalemma H+-ATPase was insignificannt: at low alcohol concentrations its activity even increased. The basic reason for the toxic effect of the alcohols on the yeast cells was suggested to be due to the increase in the anion and proton permeability of the plasma membrane. Mg2+ partially prevented the increase in the plasmalemma ion permeability by the alcohols investigated.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320060404
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    Paper (German National Licenses)
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