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Biochemical and redox characterization of the mediator complex and its associated transcription factor GeBPL, a GLABROUS1 enhancer binding protein.

Identifieur interne : 000571 ( Main/Exploration ); précédent : 000570; suivant : 000572

Biochemical and redox characterization of the mediator complex and its associated transcription factor GeBPL, a GLABROUS1 enhancer binding protein.

Auteurs : Jehad Shaikhali [Suède] ; Céline Davoine [Suède] ; Kristoffer Br Nnström [Suède] ; Nicolas Rouhier [France] ; Joakim Bygdell [Suède] ; Stefan Björklund [Suède] ; Gunnar Wingsle [Suède]

Source :

RBID : pubmed:25877331

Descripteurs français

English descriptors

Abstract

The eukaryotic mediator integrates regulatory signals from promoter-bound transcription factors (TFs) and transmits them to RNA polymerase II (Pol II) machinery. Although redox signalling is important in adjusting plant metabolism and development, nothing is known about a possible redox regulation of mediator. In the present study, using pull-down and yeast two-hybrid assays, we demonstrate the association of mediator (MED) subunits MED10a, MED28 and MED32 with the GLABROUS1 (GL1) enhancer-binding protein-like (GeBPL), a plant-specific TF that binds a promoter containing cryptochrome 1 response element 2 (CryR2) element. All the corresponding recombinant proteins form various types of covalent oligomers linked by intermolecular disulfide bonds that are reduced in vitro by the thioredoxin (TRX) and/or glutathione/glutaredoxin (GRX) systems. The presence of recombinant MED10a, MED28 and MED32 subunits or changes of its redox state affect the DNA-binding capacity of GeBPL suggesting that redox-driven conformational changes might modulate its activity. Overall, these results advance our understanding of how redox signalling affects transcription and identify mediator as a novel actor in redox signalling pathways, relaying or integrating redox changes in combination with specific TFs as GeBPL.

DOI: 10.1042/BJ20150132
PubMed: 25877331


Affiliations:


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Le document en format XML

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<DescriptorName UI="D017360" MajorTopicYN="N">Arabidopsis</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D029681" MajorTopicYN="N">Arabidopsis Proteins</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D004268" MajorTopicYN="N">DNA-Binding Proteins</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D054477" MajorTopicYN="N">Glutaredoxins</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
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<DescriptorName UI="D005978" MajorTopicYN="N">Glutathione</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
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<DescriptorName UI="D056892" MajorTopicYN="N">Mediator Complex</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D016297" MajorTopicYN="N">Mutagenesis, Site-Directed</DescriptorName>
</MeshHeading>
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<DescriptorName UI="D009154" MajorTopicYN="N">Mutation</DescriptorName>
</MeshHeading>
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<DescriptorName UI="D010084" MajorTopicYN="N">Oxidation-Reduction</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D011401" MajorTopicYN="N">Promoter Regions, Genetic</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D021122" MajorTopicYN="N">Protein Subunits</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D011994" MajorTopicYN="N">Recombinant Proteins</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D020218" MajorTopicYN="N">Response Elements</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D013879" MajorTopicYN="N">Thioredoxins</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
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<MeshHeading>
<DescriptorName UI="D014157" MajorTopicYN="N">Transcription Factors</DescriptorName>
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<DescriptorName UI="D020798" MajorTopicYN="N">Two-Hybrid System Techniques</DescriptorName>
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<Keyword MajorTopicYN="N">Arabidopsis thaliana</Keyword>
<Keyword MajorTopicYN="N">CryR2</Keyword>
<Keyword MajorTopicYN="N">GLABROUS1 enhancer-binding protein (GeBP)</Keyword>
<Keyword MajorTopicYN="N">deoxyribonucleic acid (DNA)-binding</Keyword>
<Keyword MajorTopicYN="N">mediator</Keyword>
<Keyword MajorTopicYN="N">redox</Keyword>
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</MedlineCitation>
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<PubMedPubDate PubStatus="received">
<Year>2015</Year>
<Month>01</Month>
<Day>30</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="accepted">
<Year>2015</Year>
<Month>04</Month>
<Day>16</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="entrez">
<Year>2015</Year>
<Month>4</Month>
<Day>17</Day>
<Hour>6</Hour>
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<PubMedPubDate PubStatus="pubmed">
<Year>2015</Year>
<Month>4</Month>
<Day>17</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="medline">
<Year>2015</Year>
<Month>10</Month>
<Day>7</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList>
<ArticleId IdType="pubmed">25877331</ArticleId>
<ArticleId IdType="pii">BJ20150132</ArticleId>
<ArticleId IdType="doi">10.1042/BJ20150132</ArticleId>
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</PubmedData>
</pubmed>
<affiliations>
<list>
<country>
<li>France</li>
<li>Suède</li>
</country>
<region>
<li>Grand Est</li>
<li>Lorraine (région)</li>
</region>
<settlement>
<li>Champenoux</li>
</settlement>
<orgName>
<li>Université de Lorraine</li>
</orgName>
</list>
<tree>
<country name="Suède">
<noRegion>
<name sortKey="Shaikhali, Jehad" sort="Shaikhali, Jehad" uniqKey="Shaikhali J" first="Jehad" last="Shaikhali">Jehad Shaikhali</name>
</noRegion>
<name sortKey="Bjorklund, Stefan" sort="Bjorklund, Stefan" uniqKey="Bjorklund S" first="Stefan" last="Björklund">Stefan Björklund</name>
<name sortKey="Br Nnstrom, Kristoffer" sort="Br Nnstrom, Kristoffer" uniqKey="Br Nnstrom K" first="Kristoffer" last="Br Nnström">Kristoffer Br Nnström</name>
<name sortKey="Bygdell, Joakim" sort="Bygdell, Joakim" uniqKey="Bygdell J" first="Joakim" last="Bygdell">Joakim Bygdell</name>
<name sortKey="Davoine, Celine" sort="Davoine, Celine" uniqKey="Davoine C" first="Céline" last="Davoine">Céline Davoine</name>
<name sortKey="Wingsle, Gunnar" sort="Wingsle, Gunnar" uniqKey="Wingsle G" first="Gunnar" last="Wingsle">Gunnar Wingsle</name>
</country>
<country name="France">
<region name="Grand Est">
<name sortKey="Rouhier, Nicolas" sort="Rouhier, Nicolas" uniqKey="Rouhier N" first="Nicolas" last="Rouhier">Nicolas Rouhier</name>
</region>
</country>
</tree>
</affiliations>
</record>

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