Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1979 Mar 15;178(3):521-7.
doi: 10.1042/bj1780521.

Interaction of cations with phosphate uptake by Saccharomyces cerevisiae. Effects of surface potential

G M Roomans, G W Borst-Pauwels

Interaction of cations with phosphate uptake by Saccharomyces cerevisiae. Effects of surface potential

G M Roomans et al. Biochem J. .

Abstract

The effect of bivalent cations on phosphate uptake by Saccharomyces cerevisiae was investigated. Phosphate uptake via the Na+-dependent transport system at pH 7.2 is stimulated by bivalent cations. The apparent affinity of phosphate for the transport mechanism is increased, but the apparent affinity for Na+ is decreased. Uptake of phosphate via the Na+-independent transport system is accompanied by a net proton influx of 2H+ and an efflux of 1 K+ for each phosphate ion taken up. At pH 4.5 phosphate uptake via the Na+-independent system is stimulated by bivalent cations, whereas at pH 7.2 uptake is inhibited. The effect of bivalent cations on phosphate uptake can be ascribed to a decrease in the surface potential.

PubMed Disclaimer

References

    1. Science. 1952 Sep 26;116(3013):329-31 - PubMed
    1. J Gen Physiol. 1957 Jul 20;40(6):915-23 - PubMed
    1. Biochim Biophys Acta. 1977 May 2;466(3):488-95 - PubMed
    1. Biochim Biophys Acta. 1977 May 16;467(1):65-71 - PubMed
    1. Biochim Biophys Acta. 1977 Oct 3;470(1):84-91 - PubMed