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The nuclear magnetic resonance solution structure of the mixed disulfide between Escherichia coli glutaredoxin(C14S) and glutathione.

Identifieur interne : 001240 ( Main/Exploration ); précédent : 001239; suivant : 001241

The nuclear magnetic resonance solution structure of the mixed disulfide between Escherichia coli glutaredoxin(C14S) and glutathione.

Auteurs : J H Bushweller [Suisse] ; M. Billeter ; A. Holmgren ; K. Wüthrich

Source :

RBID : pubmed:8107093

Descripteurs français

English descriptors

Abstract

The determination of the nuclear magnetic resonance (NMR) solution structured of the mixed disulfide between the mutant Escherichia coli glutaredoxin Grx(C14S) and glutathione (GSH), Grx(C14S)-SG, is described, the binding site for GSH on Grx(C14S) is located, and the non-bonding interactions between -SG and the protein are characterized. Based on nearly complete sequence-specific NMR assignments, 1010 nuclear Overhauser enhancement upper distance constraints and 116 dihedral angle constraints were obtained as the input for the structure calculations, for which the distance geometry program DIANA was used followed by energy minimization in a waterbath with the AMBER force field in the program OPAL. The -SG moiety was found to be localized on the surface of the protein in a cleft bounded by the amino acid residues Y13, T58, V59, Y72, T73 and D74. Hydrogen bonds have been identified between -SG and the residues V59 and T73 of Grx(C14S), and the formation of an additional hydrogen bond with Y72 and electrostatic interactions with the side-chains of D74 and K45 are also compatible with the NMR conformational constraints. Comparison of the reduced and oxidized forms of Grx with Grx(C14S)-SG shows that the mixed disulfide more closely resembles the oxidized form of the protein. Functional implications of this observation are discussed. Comparisons are also made with the related proteins bacteriophage T4 glutaredoxin and glutathione S-transferase.

DOI: 10.1006/jmbi.1994.1108
PubMed: 8107093


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Le document en format XML

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<term>Binding Sites (MeSH)</term>
<term>Conserved Sequence (MeSH)</term>
<term>Crystallography, X-Ray (MeSH)</term>
<term>Cysteine (MeSH)</term>
<term>Disulfides (chemistry)</term>
<term>Escherichia coli (metabolism)</term>
<term>Glutaredoxins (MeSH)</term>
<term>Glutathione (chemistry)</term>
<term>Glutathione (metabolism)</term>
<term>Hydrogen Bonding (MeSH)</term>
<term>Magnetic Resonance Spectroscopy (methods)</term>
<term>Models, Molecular (MeSH)</term>
<term>Molecular Sequence Data (MeSH)</term>
<term>Oxidoreductases (MeSH)</term>
<term>Point Mutation (MeSH)</term>
<term>Protein Conformation (MeSH)</term>
<term>Protein Folding (MeSH)</term>
<term>Protein Structure, Secondary (MeSH)</term>
<term>Proteins (chemistry)</term>
<term>Proteins (metabolism)</term>
<term>Solutions (MeSH)</term>
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<term>Cristallographie aux rayons X (MeSH)</term>
<term>Cystéine (MeSH)</term>
<term>Disulfures (composition chimique)</term>
<term>Données de séquences moléculaires (MeSH)</term>
<term>Escherichia coli (métabolisme)</term>
<term>Glutarédoxines (MeSH)</term>
<term>Glutathion (composition chimique)</term>
<term>Glutathion (métabolisme)</term>
<term>Liaison hydrogène (MeSH)</term>
<term>Modèles moléculaires (MeSH)</term>
<term>Mutation ponctuelle (MeSH)</term>
<term>Oxidoreductases (MeSH)</term>
<term>Pliage des protéines (MeSH)</term>
<term>Protéines (composition chimique)</term>
<term>Protéines (métabolisme)</term>
<term>Protéines bactériennes (MeSH)</term>
<term>Sites de fixation (MeSH)</term>
<term>Solutions (MeSH)</term>
<term>Spectroscopie par résonance magnétique (méthodes)</term>
<term>Structure secondaire des protéines (MeSH)</term>
<term>Séquence conservée (MeSH)</term>
<term>Séquence d'acides aminés (MeSH)</term>
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<term>Disulfides</term>
<term>Glutathione</term>
<term>Proteins</term>
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<term>Glutathione</term>
<term>Proteins</term>
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<term>Cysteine</term>
<term>Glutaredoxins</term>
<term>Oxidoreductases</term>
<term>Solutions</term>
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<term>Glutathion</term>
<term>Protéines</term>
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<term>Magnetic Resonance Spectroscopy</term>
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<term>Glutathion</term>
<term>Protéines</term>
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<term>Binding Sites</term>
<term>Conserved Sequence</term>
<term>Crystallography, X-Ray</term>
<term>Hydrogen Bonding</term>
<term>Models, Molecular</term>
<term>Molecular Sequence Data</term>
<term>Point Mutation</term>
<term>Protein Conformation</term>
<term>Protein Folding</term>
<term>Protein Structure, Secondary</term>
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<term>Cristallographie aux rayons X</term>
<term>Cystéine</term>
<term>Données de séquences moléculaires</term>
<term>Glutarédoxines</term>
<term>Liaison hydrogène</term>
<term>Modèles moléculaires</term>
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<term>Oxidoreductases</term>
<term>Pliage des protéines</term>
<term>Protéines bactériennes</term>
<term>Sites de fixation</term>
<term>Solutions</term>
<term>Structure secondaire des protéines</term>
<term>Séquence conservée</term>
<term>Séquence d'acides aminés</term>
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<div type="abstract" xml:lang="en">The determination of the nuclear magnetic resonance (NMR) solution structured of the mixed disulfide between the mutant Escherichia coli glutaredoxin Grx(C14S) and glutathione (GSH), Grx(C14S)-SG, is described, the binding site for GSH on Grx(C14S) is located, and the non-bonding interactions between -SG and the protein are characterized. Based on nearly complete sequence-specific NMR assignments, 1010 nuclear Overhauser enhancement upper distance constraints and 116 dihedral angle constraints were obtained as the input for the structure calculations, for which the distance geometry program DIANA was used followed by energy minimization in a waterbath with the AMBER force field in the program OPAL. The -SG moiety was found to be localized on the surface of the protein in a cleft bounded by the amino acid residues Y13, T58, V59, Y72, T73 and D74. Hydrogen bonds have been identified between -SG and the residues V59 and T73 of Grx(C14S), and the formation of an additional hydrogen bond with Y72 and electrostatic interactions with the side-chains of D74 and K45 are also compatible with the NMR conformational constraints. Comparison of the reduced and oxidized forms of Grx with Grx(C14S)-SG shows that the mixed disulfide more closely resembles the oxidized form of the protein. Functional implications of this observation are discussed. Comparisons are also made with the related proteins bacteriophage T4 glutaredoxin and glutathione S-transferase.</div>
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<AbstractText>The determination of the nuclear magnetic resonance (NMR) solution structured of the mixed disulfide between the mutant Escherichia coli glutaredoxin Grx(C14S) and glutathione (GSH), Grx(C14S)-SG, is described, the binding site for GSH on Grx(C14S) is located, and the non-bonding interactions between -SG and the protein are characterized. Based on nearly complete sequence-specific NMR assignments, 1010 nuclear Overhauser enhancement upper distance constraints and 116 dihedral angle constraints were obtained as the input for the structure calculations, for which the distance geometry program DIANA was used followed by energy minimization in a waterbath with the AMBER force field in the program OPAL. The -SG moiety was found to be localized on the surface of the protein in a cleft bounded by the amino acid residues Y13, T58, V59, Y72, T73 and D74. Hydrogen bonds have been identified between -SG and the residues V59 and T73 of Grx(C14S), and the formation of an additional hydrogen bond with Y72 and electrostatic interactions with the side-chains of D74 and K45 are also compatible with the NMR conformational constraints. Comparison of the reduced and oxidized forms of Grx with Grx(C14S)-SG shows that the mixed disulfide more closely resembles the oxidized form of the protein. Functional implications of this observation are discussed. Comparisons are also made with the related proteins bacteriophage T4 glutaredoxin and glutathione S-transferase.</AbstractText>
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