Reduction of aluminum toxicity by 2-isopropylmalic acid in the budding yeast Saccharomyces cerevisiae.
Identifieur interne : 002215 ( Main/Exploration ); précédent : 002214; suivant : 002216Reduction of aluminum toxicity by 2-isopropylmalic acid in the budding yeast Saccharomyces cerevisiae.
Auteurs : Taisuke Suzuki [Japon] ; Shun Tamura ; Hiromi Nakanishi ; Mitsuru Tashiro ; Naoko K. Nishizawa ; Etsuro YoshimuraSource :
- Biological trace element research [ 0163-4984 ] ; 2007.
Descripteurs français
- KwdFr :
- 2-Isopropylmalate synthase (génétique), Chlorure d'aluminium (MeSH), Chlorures (toxicité), Composés de l'aluminium (toxicité), Malates (pharmacologie), Protéines de Saccharomyces cerevisiae (génétique), Saccharomyces cerevisiae (croissance et développement), Saccharomyces cerevisiae (effets des médicaments et des substances chimiques), Saccharomyces cerevisiae (génétique).
- MESH :
- croissance et développement : Saccharomyces cerevisiae.
- effets des médicaments et des substances chimiques : Saccharomyces cerevisiae.
- génétique : 2-Isopropylmalate synthase, Protéines de Saccharomyces cerevisiae, Saccharomyces cerevisiae.
- pharmacologie : Malates.
- toxicité : Chlorures, Composés de l'aluminium.
- Chlorure d'aluminium.
English descriptors
- KwdEn :
- 2-Isopropylmalate Synthase (genetics), Aluminum Chloride (MeSH), Aluminum Compounds (toxicity), Chlorides (toxicity), Malates (pharmacology), Saccharomyces cerevisiae (drug effects), Saccharomyces cerevisiae (genetics), Saccharomyces cerevisiae (growth & development), Saccharomyces cerevisiae Proteins (genetics).
- MESH :
- chemical , genetics : 2-Isopropylmalate Synthase, Saccharomyces cerevisiae Proteins.
- chemical , pharmacology : Malates.
- chemical , toxicity : Aluminum Compounds, Chlorides.
- chemical : Aluminum Chloride.
- drug effects : Saccharomyces cerevisiae.
- genetics : Saccharomyces cerevisiae.
- growth & development : Saccharomyces cerevisiae.
Abstract
The budding yeast Saccharomyces cerevisiae secretes 2-isopropylmalic acid (2-iPMA), an intermediate in leucine biosynthesis. Because 2-iPMA binds Al(III) in the culture medium, it is thought to reduce toxicity by Al(III). The effects of 2-iPMA and malic acid (MA) on Al toxicity were investigated in a medium with a low pH and low concentrations of phosphates and magnesium. The reduction in the growth of S. cerevisiae observed in the presence of 100 muM Al(III) ions was relieved more by the addition of 1.0 mM 2-iPMA than by 1.0 mM MA, indicating that 2-iPMA possesses superior Al(III)-ion detoxification ability. Investigations using the wild type and the deltaleu4 and deltaleu9 mutant strains indicated that secretion of a sufficient level of 2-iPMA was required to enhance the Al tolerance. It is thought that 2-iPMA secreted from the yeast cells chelates Al ions and prevents them from entering the cells, resulting in Al tolerance.
DOI: 10.1007/s12011-007-8011-9
PubMed: 17916978
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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<term>Aluminum Compounds (toxicity)</term>
<term>Chlorides (toxicity)</term>
<term>Malates (pharmacology)</term>
<term>Saccharomyces cerevisiae (drug effects)</term>
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<term>Composés de l'aluminium (toxicité)</term>
<term>Malates (pharmacologie)</term>
<term>Protéines de Saccharomyces cerevisiae (génétique)</term>
<term>Saccharomyces cerevisiae (croissance et développement)</term>
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<term>Saccharomyces cerevisiae (génétique)</term>
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<front><div type="abstract" xml:lang="en">The budding yeast Saccharomyces cerevisiae secretes 2-isopropylmalic acid (2-iPMA), an intermediate in leucine biosynthesis. Because 2-iPMA binds Al(III) in the culture medium, it is thought to reduce toxicity by Al(III). The effects of 2-iPMA and malic acid (MA) on Al toxicity were investigated in a medium with a low pH and low concentrations of phosphates and magnesium. The reduction in the growth of S. cerevisiae observed in the presence of 100 muM Al(III) ions was relieved more by the addition of 1.0 mM 2-iPMA than by 1.0 mM MA, indicating that 2-iPMA possesses superior Al(III)-ion detoxification ability. Investigations using the wild type and the deltaleu4 and deltaleu9 mutant strains indicated that secretion of a sufficient level of 2-iPMA was required to enhance the Al tolerance. It is thought that 2-iPMA secreted from the yeast cells chelates Al ions and prevents them from entering the cells, resulting in Al tolerance.</div>
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<Title>Biological trace element research</Title>
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<ArticleTitle>Reduction of aluminum toxicity by 2-isopropylmalic acid in the budding yeast Saccharomyces cerevisiae.</ArticleTitle>
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<Abstract><AbstractText>The budding yeast Saccharomyces cerevisiae secretes 2-isopropylmalic acid (2-iPMA), an intermediate in leucine biosynthesis. Because 2-iPMA binds Al(III) in the culture medium, it is thought to reduce toxicity by Al(III). The effects of 2-iPMA and malic acid (MA) on Al toxicity were investigated in a medium with a low pH and low concentrations of phosphates and magnesium. The reduction in the growth of S. cerevisiae observed in the presence of 100 muM Al(III) ions was relieved more by the addition of 1.0 mM 2-iPMA than by 1.0 mM MA, indicating that 2-iPMA possesses superior Al(III)-ion detoxification ability. Investigations using the wild type and the deltaleu4 and deltaleu9 mutant strains indicated that secretion of a sufficient level of 2-iPMA was required to enhance the Al tolerance. It is thought that 2-iPMA secreted from the yeast cells chelates Al ions and prevents them from entering the cells, resulting in Al tolerance.</AbstractText>
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<tree><noCountry><name sortKey="Nakanishi, Hiromi" sort="Nakanishi, Hiromi" uniqKey="Nakanishi H" first="Hiromi" last="Nakanishi">Hiromi Nakanishi</name>
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