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3grx

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[[Image:3grx.gif|left|200px]]
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{{STRUCTURE_3grx| PDB=3grx | SCENE= }}
{{STRUCTURE_3grx| PDB=3grx | SCENE= }}
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'''NMR STRUCTURE OF ESCHERICHIA COLI GLUTAREDOXIN 3-GLUTATHIONE MIXED DISULFIDE COMPLEX, 20 STRUCTURES'''
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===NMR STRUCTURE OF ESCHERICHIA COLI GLUTAREDOXIN 3-GLUTATHIONE MIXED DISULFIDE COMPLEX, 20 STRUCTURES===
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==Overview==
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Glutaredoxins (Grxs) catalyze reversible oxidation/reduction of protein disulfide groups and glutathione-containing mixed disulfide groups via an active site Grx-glutathione mixed disulfide (Grx-SG) intermediate. The NMR solution structure of the Escherichia coli Grx3 mixed disulfide with glutathione (Grx3-SG) was determined using a C14S mutant which traps this intermediate in the redox reaction. The structure contains a thioredoxin fold, with a well-defined binding site for glutathione which involves two intermolecular backbone-backbone hydrogen bonds forming an antiparallel intermolecular beta-bridge between the protein and glutathione. The solution structure of E. coli Grx3-SG also suggests a binding site for a second glutathione in the reduction of the Grx3-SG intermediate, which is consistent with the specificity of reduction observed in Grxs. Molecular details of the structure in relation to the stability of the intermediate and the activity of Grx3 as a reductant of glutathione mixed disulfide groups are discussed. A comparison of glutathione binding in Grx3-SG and ligand binding in other members of the thioredoxin superfamily is presented, which illustrates the highly conserved intermolecular interactions in this protein family.
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(as it appears on PubMed at http://www.pubmed.gov), where 9973569 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9973569}}
==About this Structure==
==About this Structure==
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3GRX is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3GRX OCA].
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3GRX is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3GRX OCA].
==Reference==
==Reference==
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[[Category: Thioltransferase]]
[[Category: Thioltransferase]]
[[Category: Thioredoxin superfamily]]
[[Category: Thioredoxin superfamily]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 22:03:05 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 18:49:25 2008''

Revision as of 15:49, 28 July 2008

Image:3grx.png

Template:STRUCTURE 3grx

NMR STRUCTURE OF ESCHERICHIA COLI GLUTAREDOXIN 3-GLUTATHIONE MIXED DISULFIDE COMPLEX, 20 STRUCTURES

Template:ABSTRACT PUBMED 9973569

About this Structure

3GRX is a Single protein structure of sequence from Escherichia coli. Full experimental information is available from OCA.

Reference

NMR structure of Escherichia coli glutaredoxin 3-glutathione mixed disulfide complex: implications for the enzymatic mechanism., Nordstrand K, slund F, Holmgren A, Otting G, Berndt KD, J Mol Biol. 1999 Feb 19;286(2):541-52. PMID:9973569

Page seeded by OCA on Mon Jul 28 18:49:25 2008

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