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Overexpression of rice glutaredoxins (OsGrxs) significantly reduces arsenite accumulation by maintaining glutathione pool and modulating aquaporins in yeast.

Identifieur interne : 000435 ( Main/Exploration ); précédent : 000434; suivant : 000436

Overexpression of rice glutaredoxins (OsGrxs) significantly reduces arsenite accumulation by maintaining glutathione pool and modulating aquaporins in yeast.

Auteurs : Pankaj Kumar Verma [Inde] ; Shikha Verma [Inde] ; Alok Kumar Meher [Inde] ; Veena Pande [Inde] ; Shekhar Mallick [Inde] ; Amit Kumar Bansiwal [Inde] ; Rudra Deo Tripathi [Inde] ; Om Parkash Dhankher [États-Unis] ; Debasis Chakrabarty [Inde]

Source :

RBID : pubmed:27174139

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English descriptors

Abstract

Arsenic (As) is an acute poison and class I carcinogen, can cause a serious health risk. Staple crops like rice are the primary source of As contamination in human food. Rice grown on As contaminated areas accumulates higher As in their edible parts. Based on our previous transcriptome data, two rice glutaredoxins (OsGrx_C7 and OsGrx_C2.1) were identified that showed up-regulated expression during As stress. Here, we report OsGrx_C7 and OsGrx_C2.1 from rice involved in the regulation of intracellular arsenite (AsIII). To elucidate the mechanism of OsGrx mediated As tolerance, both OsGrxs were cloned and expressed in Escherichia coli (Δars) and Saccharomyces cerevisiae mutant strains (Δycf1, Δacr3). The expression of OsGrxs increased As tolerance in E. coli (Δars) mutant strain (up to 4 mM AsV and up to 0.6 mM AsIII). During AsIII exposure, S. cerevisiae (Δacr3) harboring OsGrx_C7 and OsGrx_C2.1 have lower intracellular AsIII accumulation (up to 30.43% and 24.90%, respectively), compared to vector control. Arsenic accumulation in As-sensitive S. cerevisiae mutant (Δycf1) also reduced significantly on exposure to inorganic As. The expression of OsGrxs in yeast maintained intracellular GSH pool and increased extracellular GSH concentration. Purified OsGrxs displays in vitro GSH-disulfide oxidoreductase, glutathione reductase and arsenate reductase activities. Also, both OsGrxs are involved in AsIII extrusion by altering the Fps1 transcripts in yeast and protect the cell by maintaining cellular GSH pool. Thus, our results strongly suggest that OsGrxs play a crucial role in the maintenance of the intracellular GSH pool and redox status of the cell during both AsV and AsIII stress and might be involved in regulating intracellular AsIII levels by modulation of aquaporin expression and functions.

DOI: 10.1016/j.plaphy.2016.04.052
PubMed: 27174139


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<term>Aquaporins (metabolism)</term>
<term>Arsenate Reductases (metabolism)</term>
<term>Arsenites (metabolism)</term>
<term>Biological Transport (MeSH)</term>
<term>Genes, Plant (MeSH)</term>
<term>Genetic Complementation Test (MeSH)</term>
<term>Glutaredoxins (metabolism)</term>
<term>Glutathione (metabolism)</term>
<term>Glutathione Reductase (metabolism)</term>
<term>Mutation (genetics)</term>
<term>Oryza (genetics)</term>
<term>Oryza (metabolism)</term>
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<term>Protein Disulfide Reductase (Glutathione) (metabolism)</term>
<term>RNA, Messenger (genetics)</term>
<term>RNA, Messenger (metabolism)</term>
<term>Saccharomyces cerevisiae (genetics)</term>
<term>Saccharomyces cerevisiae (metabolism)</term>
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<term>ARN messager (génétique)</term>
<term>ARN messager (métabolisme)</term>
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<term>Arsenate Reductases (métabolisme)</term>
<term>Arsénites (métabolisme)</term>
<term>Glutarédoxines (métabolisme)</term>
<term>Glutathion (métabolisme)</term>
<term>Glutathione reductase (métabolisme)</term>
<term>Gènes de plante (MeSH)</term>
<term>Mutation (génétique)</term>
<term>Oryza (génétique)</term>
<term>Oryza (métabolisme)</term>
<term>Phénotype (MeSH)</term>
<term>Protein-disulfide reductase (glutathione) (métabolisme)</term>
<term>Protéines de Saccharomyces cerevisiae (génétique)</term>
<term>Protéines de Saccharomyces cerevisiae (métabolisme)</term>
<term>Saccharomyces cerevisiae (génétique)</term>
<term>Saccharomyces cerevisiae (métabolisme)</term>
<term>Test de complémentation (MeSH)</term>
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<term>RNA, Messenger</term>
<term>Saccharomyces cerevisiae Proteins</term>
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<term>Arsenate Reductases</term>
<term>Arsenites</term>
<term>Glutaredoxins</term>
<term>Glutathione</term>
<term>Glutathione Reductase</term>
<term>Protein Disulfide Reductase (Glutathione)</term>
<term>RNA, Messenger</term>
<term>Saccharomyces cerevisiae Proteins</term>
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<term>Protéines de Saccharomyces cerevisiae</term>
<term>Saccharomyces cerevisiae</term>
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<term>Arsenate Reductases</term>
<term>Arsénites</term>
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<div type="abstract" xml:lang="en">Arsenic (As) is an acute poison and class I carcinogen, can cause a serious health risk. Staple crops like rice are the primary source of As contamination in human food. Rice grown on As contaminated areas accumulates higher As in their edible parts. Based on our previous transcriptome data, two rice glutaredoxins (OsGrx_C7 and OsGrx_C2.1) were identified that showed up-regulated expression during As stress. Here, we report OsGrx_C7 and OsGrx_C2.1 from rice involved in the regulation of intracellular arsenite (AsIII). To elucidate the mechanism of OsGrx mediated As tolerance, both OsGrxs were cloned and expressed in Escherichia coli (Δars) and Saccharomyces cerevisiae mutant strains (Δycf1, Δacr3). The expression of OsGrxs increased As tolerance in E. coli (Δars) mutant strain (up to 4 mM AsV and up to 0.6 mM AsIII). During AsIII exposure, S. cerevisiae (Δacr3) harboring OsGrx_C7 and OsGrx_C2.1 have lower intracellular AsIII accumulation (up to 30.43% and 24.90%, respectively), compared to vector control. Arsenic accumulation in As-sensitive S. cerevisiae mutant (Δycf1) also reduced significantly on exposure to inorganic As. The expression of OsGrxs in yeast maintained intracellular GSH pool and increased extracellular GSH concentration. Purified OsGrxs displays in vitro GSH-disulfide oxidoreductase, glutathione reductase and arsenate reductase activities. Also, both OsGrxs are involved in AsIII extrusion by altering the Fps1 transcripts in yeast and protect the cell by maintaining cellular GSH pool. Thus, our results strongly suggest that OsGrxs play a crucial role in the maintenance of the intracellular GSH pool and redox status of the cell during both AsV and AsIII stress and might be involved in regulating intracellular AsIII levels by modulation of aquaporin expression and functions. </div>
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<AbstractText>Arsenic (As) is an acute poison and class I carcinogen, can cause a serious health risk. Staple crops like rice are the primary source of As contamination in human food. Rice grown on As contaminated areas accumulates higher As in their edible parts. Based on our previous transcriptome data, two rice glutaredoxins (OsGrx_C7 and OsGrx_C2.1) were identified that showed up-regulated expression during As stress. Here, we report OsGrx_C7 and OsGrx_C2.1 from rice involved in the regulation of intracellular arsenite (AsIII). To elucidate the mechanism of OsGrx mediated As tolerance, both OsGrxs were cloned and expressed in Escherichia coli (Δars) and Saccharomyces cerevisiae mutant strains (Δycf1, Δacr3). The expression of OsGrxs increased As tolerance in E. coli (Δars) mutant strain (up to 4 mM AsV and up to 0.6 mM AsIII). During AsIII exposure, S. cerevisiae (Δacr3) harboring OsGrx_C7 and OsGrx_C2.1 have lower intracellular AsIII accumulation (up to 30.43% and 24.90%, respectively), compared to vector control. Arsenic accumulation in As-sensitive S. cerevisiae mutant (Δycf1) also reduced significantly on exposure to inorganic As. The expression of OsGrxs in yeast maintained intracellular GSH pool and increased extracellular GSH concentration. Purified OsGrxs displays in vitro GSH-disulfide oxidoreductase, glutathione reductase and arsenate reductase activities. Also, both OsGrxs are involved in AsIII extrusion by altering the Fps1 transcripts in yeast and protect the cell by maintaining cellular GSH pool. Thus, our results strongly suggest that OsGrxs play a crucial role in the maintenance of the intracellular GSH pool and redox status of the cell during both AsV and AsIII stress and might be involved in regulating intracellular AsIII levels by modulation of aquaporin expression and functions. </AbstractText>
<CopyrightInformation>Copyright © 2016 Elsevier Masson SAS. All rights reserved.</CopyrightInformation>
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<Initials>RD</Initials>
<AffiliationInfo>
<Affiliation>Environmental Biotechnology Division, CSIR-National Botanical Research Institute, India.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Dhankher</LastName>
<ForeName>Om Parkash</ForeName>
<Initials>OP</Initials>
<AffiliationInfo>
<Affiliation>Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, USA.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Chakrabarty</LastName>
<ForeName>Debasis</ForeName>
<Initials>D</Initials>
<AffiliationInfo>
<Affiliation>Genetics and Molecular Biology Division, CSIR-National Botanical Research Institute, India. Electronic address: chakrabartyd@nbri.res.in.</Affiliation>
</AffiliationInfo>
</Author>
</AuthorList>
<Language>eng</Language>
<PublicationTypeList>
<PublicationType UI="D016428">Journal Article</PublicationType>
</PublicationTypeList>
<ArticleDate DateType="Electronic">
<Year>2016</Year>
<Month>04</Month>
<Day>30</Day>
</ArticleDate>
</Article>
<MedlineJournalInfo>
<Country>France</Country>
<MedlineTA>Plant Physiol Biochem</MedlineTA>
<NlmUniqueID>9882449</NlmUniqueID>
<ISSNLinking>0981-9428</ISSNLinking>
</MedlineJournalInfo>
<ChemicalList>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D020346">Aquaporins</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D018053">Arsenites</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D054477">Glutaredoxins</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D012333">RNA, Messenger</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D029701">Saccharomyces cerevisiae Proteins</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>EC 1.20.-</RegistryNumber>
<NameOfSubstance UI="D053502">Arsenate Reductases</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>EC 1.8.1.7</RegistryNumber>
<NameOfSubstance UI="D005980">Glutathione Reductase</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>EC 1.8.4.2</RegistryNumber>
<NameOfSubstance UI="D011490">Protein Disulfide Reductase (Glutathione)</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>GAN16C9B8O</RegistryNumber>
<NameOfSubstance UI="D005978">Glutathione</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>N5509X556J</RegistryNumber>
<NameOfSubstance UI="C015001">arsenite</NameOfSubstance>
</Chemical>
</ChemicalList>
<CitationSubset>IM</CitationSubset>
<MeshHeadingList>
<MeshHeading>
<DescriptorName UI="D020346" MajorTopicYN="N">Aquaporins</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D053502" MajorTopicYN="N">Arsenate Reductases</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D018053" MajorTopicYN="N">Arsenites</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D001692" MajorTopicYN="N">Biological Transport</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D017343" MajorTopicYN="N">Genes, Plant</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D005816" MajorTopicYN="N">Genetic Complementation Test</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D054477" MajorTopicYN="N">Glutaredoxins</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D005978" MajorTopicYN="N">Glutathione</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D005980" MajorTopicYN="N">Glutathione Reductase</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D009154" MajorTopicYN="N">Mutation</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D012275" MajorTopicYN="N">Oryza</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010641" MajorTopicYN="N">Phenotype</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D011490" MajorTopicYN="N">Protein Disulfide Reductase (Glutathione)</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D012333" MajorTopicYN="N">RNA, Messenger</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D012441" MajorTopicYN="N">Saccharomyces cerevisiae</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D029701" MajorTopicYN="N">Saccharomyces cerevisiae Proteins</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
</MeshHeadingList>
<KeywordList Owner="NOTNLM">
<Keyword MajorTopicYN="N">Arsenic</Keyword>
<Keyword MajorTopicYN="N">GSH</Keyword>
<Keyword MajorTopicYN="N">Glutaredoxin</Keyword>
<Keyword MajorTopicYN="N">Oryza sativa</Keyword>
<Keyword MajorTopicYN="N">OsGrxs</Keyword>
</KeywordList>
</MedlineCitation>
<PubmedData>
<History>
<PubMedPubDate PubStatus="received">
<Year>2016</Year>
<Month>03</Month>
<Day>04</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="revised">
<Year>2016</Year>
<Month>04</Month>
<Day>29</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="accepted">
<Year>2016</Year>
<Month>04</Month>
<Day>29</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="entrez">
<Year>2016</Year>
<Month>5</Month>
<Day>14</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="pubmed">
<Year>2016</Year>
<Month>5</Month>
<Day>14</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="medline">
<Year>2017</Year>
<Month>3</Month>
<Day>28</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList>
<ArticleId IdType="pubmed">27174139</ArticleId>
<ArticleId IdType="pii">S0981-9428(16)30167-X</ArticleId>
<ArticleId IdType="doi">10.1016/j.plaphy.2016.04.052</ArticleId>
</ArticleIdList>
</PubmedData>
</pubmed>
<affiliations>
<list>
<country>
<li>Inde</li>
<li>États-Unis</li>
</country>
<region>
<li>Massachusetts</li>
</region>
<settlement>
<li>Amherst (Massachusetts)</li>
</settlement>
<orgName>
<li>Université du Massachusetts</li>
</orgName>
</list>
<tree>
<country name="Inde">
<noRegion>
<name sortKey="Verma, Pankaj Kumar" sort="Verma, Pankaj Kumar" uniqKey="Verma P" first="Pankaj Kumar" last="Verma">Pankaj Kumar Verma</name>
</noRegion>
<name sortKey="Bansiwal, Amit Kumar" sort="Bansiwal, Amit Kumar" uniqKey="Bansiwal A" first="Amit Kumar" last="Bansiwal">Amit Kumar Bansiwal</name>
<name sortKey="Chakrabarty, Debasis" sort="Chakrabarty, Debasis" uniqKey="Chakrabarty D" first="Debasis" last="Chakrabarty">Debasis Chakrabarty</name>
<name sortKey="Mallick, Shekhar" sort="Mallick, Shekhar" uniqKey="Mallick S" first="Shekhar" last="Mallick">Shekhar Mallick</name>
<name sortKey="Meher, Alok Kumar" sort="Meher, Alok Kumar" uniqKey="Meher A" first="Alok Kumar" last="Meher">Alok Kumar Meher</name>
<name sortKey="Pande, Veena" sort="Pande, Veena" uniqKey="Pande V" first="Veena" last="Pande">Veena Pande</name>
<name sortKey="Tripathi, Rudra Deo" sort="Tripathi, Rudra Deo" uniqKey="Tripathi R" first="Rudra Deo" last="Tripathi">Rudra Deo Tripathi</name>
<name sortKey="Verma, Shikha" sort="Verma, Shikha" uniqKey="Verma S" first="Shikha" last="Verma">Shikha Verma</name>
</country>
<country name="États-Unis">
<region name="Massachusetts">
<name sortKey="Dhankher, Om Parkash" sort="Dhankher, Om Parkash" uniqKey="Dhankher O" first="Om Parkash" last="Dhankher">Om Parkash Dhankher</name>
</region>
</country>
</tree>
</affiliations>
</record>

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