Cited by 89Selenium in Biological SystemsFungal and yeast genetics researchPlant nutrient uptake and metabolism

The DOI matches its Crossref record; 35 of the 35 references it cites were found in a registry or an index.

Uptake of Selenite by Saccharomyces cerevisiae Involves the High and Low Affinity Orthophosphate Transporters

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Abstract

Although the general cytotoxicity of selenite is well established, the mechanism by which this compound crosses cellular membranes is still unknown. Here, we show that in Saccharomyces cerevisiae, the transport system used opportunistically by selenite depends on the phosphate concentration in the growth medium. Both the high and low affinity phosphate transporters are involved in selenite uptake. When cells are grown at low P(i) concentrations, the high affinity phosphate transporter Pho84p is the major contributor to selenite uptake. When phosphate is abundant, selenite is internalized through the low affinity P(i) transporters (Pho87p, Pho90p, and Pho91p). Accordingly, inactivation of the high affinity phosphate transporter Pho84p results in increased resistance to selenite and reduced uptake in low P(i) medium, whereas deletion of SPL2, a negative regulator of low affinity phosphate uptake, results in exacerbated sensitivity to selenite. Measurements of the kinetic parameters for selenite and phosphate uptake demonstrate that there is a competition between phosphate and selenite ions for both P(i) transport systems. In addition, our results indicate that Pho84p is very selective for phosphate as compared with selenite, whereas the low affinity transporters discriminate less efficiently between the two ions. The properties of phosphate and selenite transport enable us to propose an explanation to the paradoxical increase of selenite toxicity when phosphate concentration in the growth medium is raised above 1 mm.

Overview

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Crossref · 10.1074/jbc.m110.139865

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35 of 35 references verified0 citation errors · 0 not checkable

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Research works printed but not linked: 2

  1. Bun-Ya, 1991, Mol. Cell. Biol., 11, 3229
  2. Dardel, 1994, Comput. Appl. Biosci., 10, 273

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Metadata

Authors
Lazard, M., Blanquet, S., Fisicaro, P., Labarraque, G., & Plateau, P.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Laboratoire National de Métrologie et d'Essais (FR)
Corresponding author
Lazard, Myriam
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2010-10
Volume
285
Issue
42
Pages
32029-32037
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2033031412
Cited by
89
References
35
Citations by year
2026: 7 · 2025: 7 · 2024: 6 · 2023: 11 · 2022: 5 · 2021: 8 · 2020: 9 · 2019: 4 · 2018: 5 · 2017: 2 · 2016: 9 · 2015: 5 · 2014: 3 · 2013: 2 · 2012: 1
FWCI
2.43
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Selenium in Biological Systems
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant nutrient uptake and metabolism
Keywords
selenite uptake, Saccharomyces cerevisiae, phosphate transporters, selenite toxicity, phosphate competition, ion selectivity
MeSH terms
Culture Media, Phosphates, Saccharomyces cerevisiae, Sodium Selenite, Phosphate Transport Proteins, Proton-Phosphate Symporters, Saccharomyces cerevisiae Proteins

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