Serveur d'exploration sur la glutarédoxine

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Structure of glutaredoxin Grx1p C30S mutant from yeast.

Identifieur interne : 000C54 ( Main/Exploration ); précédent : 000C53; suivant : 000C55

Structure of glutaredoxin Grx1p C30S mutant from yeast.

Auteurs : Kjell O. H Kansson [Danemark] ; Jakob R. Winther

Source :

RBID : pubmed:17327665

Descripteurs français

English descriptors

Abstract

Glutathionylated glutaredoxin Grx1p C30S mutant from yeast has been crystallized in space group C222(1) and a fusion protein between redox-sensitive yellow fluorescent protein (rxYFP) and Grx1p C30S has been crystallized in space group P6(4). The structure of the latter was solved by molecular replacement using the known rxYFP structure as a search model. The structure of the Grx1p moiety was built and the structure was refined against 2.7 A synchrotron data to an R(free) of 25.7%. There are no specific contacts between the two domains, indicating that the observed enhanced exchange of reduction equivalents between them arises from diffusion or from an enhanced collision rate in solution. The Grx1p structure thus obtained was subsequently used to solve the structure of the orthorhombic crystal, which could be refined against 2.0 A data to an R(free) of 24.3%. The structure of the glutathione-bound protein and the glutaredoxin domain in the fusion protein are similar. The covalent disulfide bond between the glutathione and protein is broken upon exposure to synchrotron radiation. The structure and the glutathione-binding mode are described and compared with existing crystallographic and nuclear magnetic resonance (NMR) structures of related glutaredoxins. Conserved residues are clustered on one side of the active site.

DOI: 10.1107/S0907444906051675
PubMed: 17327665


Affiliations:


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Le document en format XML

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<nlm:affiliation>Department of Molecular Biology, August Krogh Building, University of Copenhagen, Universitetsparken 13, DK-2100 Copenhagen Ø, Denmark. kohakansson@aki.ku.dk</nlm:affiliation>
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<wicri:regionArea>Department of Molecular Biology, August Krogh Building, University of Copenhagen, Universitetsparken 13, DK-2100 Copenhagen Ø</wicri:regionArea>
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<term>Binding Sites (MeSH)</term>
<term>Conserved Sequence (MeSH)</term>
<term>Crystallography, X-Ray (MeSH)</term>
<term>Glutaredoxins (MeSH)</term>
<term>Glutathione (genetics)</term>
<term>Glutathione (metabolism)</term>
<term>Luminescent Proteins (genetics)</term>
<term>Magnetic Resonance Spectroscopy (MeSH)</term>
<term>Models, Molecular (MeSH)</term>
<term>Molecular Sequence Data (MeSH)</term>
<term>Mutation (MeSH)</term>
<term>Oxidoreductases (chemistry)</term>
<term>Oxidoreductases (genetics)</term>
<term>Oxidoreductases (metabolism)</term>
<term>Protein Folding (MeSH)</term>
<term>Recombinant Fusion Proteins (chemistry)</term>
<term>Recombinant Fusion Proteins (genetics)</term>
<term>Saccharomyces cerevisiae Proteins (chemistry)</term>
<term>Saccharomyces cerevisiae Proteins (genetics)</term>
<term>Saccharomyces cerevisiae Proteins (metabolism)</term>
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<term>Cristallographie aux rayons X (MeSH)</term>
<term>Données de séquences moléculaires (MeSH)</term>
<term>Glutarédoxines (MeSH)</term>
<term>Glutathion (génétique)</term>
<term>Glutathion (métabolisme)</term>
<term>Modèles moléculaires (MeSH)</term>
<term>Mutation (MeSH)</term>
<term>Oxidoreductases (composition chimique)</term>
<term>Oxidoreductases (génétique)</term>
<term>Oxidoreductases (métabolisme)</term>
<term>Pliage des protéines (MeSH)</term>
<term>Protéines bactériennes (génétique)</term>
<term>Protéines de Saccharomyces cerevisiae (composition chimique)</term>
<term>Protéines de Saccharomyces cerevisiae (génétique)</term>
<term>Protéines de Saccharomyces cerevisiae (métabolisme)</term>
<term>Protéines de fusion recombinantes (composition chimique)</term>
<term>Protéines de fusion recombinantes (génétique)</term>
<term>Protéines luminescentes (génétique)</term>
<term>Sites de fixation (MeSH)</term>
<term>Spectroscopie par résonance magnétique (MeSH)</term>
<term>Séquence conservée (MeSH)</term>
<term>Séquence d'acides aminés (MeSH)</term>
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<term>Oxidoreductases</term>
<term>Recombinant Fusion Proteins</term>
<term>Saccharomyces cerevisiae Proteins</term>
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<term>Bacterial Proteins</term>
<term>Glutathione</term>
<term>Luminescent Proteins</term>
<term>Oxidoreductases</term>
<term>Recombinant Fusion Proteins</term>
<term>Saccharomyces cerevisiae Proteins</term>
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<term>Saccharomyces cerevisiae Proteins</term>
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<term>Oxidoreductases</term>
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<term>Protéines de fusion recombinantes</term>
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<term>Oxidoreductases</term>
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<term>Protéines de Saccharomyces cerevisiae</term>
<term>Protéines de fusion recombinantes</term>
<term>Protéines luminescentes</term>
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<term>Oxidoreductases</term>
<term>Protéines de Saccharomyces cerevisiae</term>
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<term>Amino Acid Sequence</term>
<term>Binding Sites</term>
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<term>Magnetic Resonance Spectroscopy</term>
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<term>Molecular Sequence Data</term>
<term>Mutation</term>
<term>Protein Folding</term>
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<term>Cristallographie aux rayons X</term>
<term>Données de séquences moléculaires</term>
<term>Glutarédoxines</term>
<term>Modèles moléculaires</term>
<term>Mutation</term>
<term>Pliage des protéines</term>
<term>Sites de fixation</term>
<term>Spectroscopie par résonance magnétique</term>
<term>Séquence conservée</term>
<term>Séquence d'acides aminés</term>
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<div type="abstract" xml:lang="en">Glutathionylated glutaredoxin Grx1p C30S mutant from yeast has been crystallized in space group C222(1) and a fusion protein between redox-sensitive yellow fluorescent protein (rxYFP) and Grx1p C30S has been crystallized in space group P6(4). The structure of the latter was solved by molecular replacement using the known rxYFP structure as a search model. The structure of the Grx1p moiety was built and the structure was refined against 2.7 A synchrotron data to an R(free) of 25.7%. There are no specific contacts between the two domains, indicating that the observed enhanced exchange of reduction equivalents between them arises from diffusion or from an enhanced collision rate in solution. The Grx1p structure thus obtained was subsequently used to solve the structure of the orthorhombic crystal, which could be refined against 2.0 A data to an R(free) of 24.3%. The structure of the glutathione-bound protein and the glutaredoxin domain in the fusion protein are similar. The covalent disulfide bond between the glutathione and protein is broken upon exposure to synchrotron radiation. The structure and the glutathione-binding mode are described and compared with existing crystallographic and nuclear magnetic resonance (NMR) structures of related glutaredoxins. Conserved residues are clustered on one side of the active site.</div>
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<Title>Acta crystallographica. Section D, Biological crystallography</Title>
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<AbstractText>Glutathionylated glutaredoxin Grx1p C30S mutant from yeast has been crystallized in space group C222(1) and a fusion protein between redox-sensitive yellow fluorescent protein (rxYFP) and Grx1p C30S has been crystallized in space group P6(4). The structure of the latter was solved by molecular replacement using the known rxYFP structure as a search model. The structure of the Grx1p moiety was built and the structure was refined against 2.7 A synchrotron data to an R(free) of 25.7%. There are no specific contacts between the two domains, indicating that the observed enhanced exchange of reduction equivalents between them arises from diffusion or from an enhanced collision rate in solution. The Grx1p structure thus obtained was subsequently used to solve the structure of the orthorhombic crystal, which could be refined against 2.0 A data to an R(free) of 24.3%. The structure of the glutathione-bound protein and the glutaredoxin domain in the fusion protein are similar. The covalent disulfide bond between the glutathione and protein is broken upon exposure to synchrotron radiation. The structure and the glutathione-binding mode are described and compared with existing crystallographic and nuclear magnetic resonance (NMR) structures of related glutaredoxins. Conserved residues are clustered on one side of the active site.</AbstractText>
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<LastName>Håkansson</LastName>
<ForeName>Kjell O</ForeName>
<Initials>KO</Initials>
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<Affiliation>Department of Molecular Biology, August Krogh Building, University of Copenhagen, Universitetsparken 13, DK-2100 Copenhagen Ø, Denmark. kohakansson@aki.ku.dk</Affiliation>
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<LastName>Winther</LastName>
<ForeName>Jakob R</ForeName>
<Initials>JR</Initials>
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<NameOfSubstance UI="D054477">Glutaredoxins</NameOfSubstance>
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<Year>2006</Year>
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