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1grx

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{{STRUCTURE_1grx| PDB=1grx | SCENE= }}
{{STRUCTURE_1grx| PDB=1grx | SCENE= }}
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'''STRUCTURE OF E. COLI GLUTAREDOXIN'''
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===STRUCTURE OF E. COLI GLUTAREDOXIN===
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==Overview==
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The determination of the NMR structure of oxidized Escherichia coli glutaredoxin in aqueous solution is described, and comparisons of this structure with that of reduced E. coli glutaredoxin and the related proteins E. coli thioredoxin and T4 glutaredoxin are presented. Based on nearly complete sequence-specific 1H-NMR assignments, 804 nuclear Overhauser enhancement distance constraints and 74 dihedral angle constraints were obtained as the input for the structure calculations, for which the distance geometry program DIANA was used followed by simulated annealing with the program X-PLOR. The molecular architecture of oxidized glutaredoxin is made up of three helices and a four-stranded beta-sheet. The three-dimensional structures of oxidized and the recently described reduced glutaredoxin are very similar. Quantitative analysis of the exchange rates of 34 slowly exchanging amide protons from corresponding series of two-dimensional [15N,1H]-correlated spectra of oxidized and reduced glutaredoxin showed close agreement, indicating almost identical hydrogen-bonding patterns. Nonetheless, differences in local dynamics involving residues near the active site and the C-terminal alpha-helix were clearly manifested. Comparison of the structure of E. coli glutaredoxin with those of T4 glutaredoxin and E. coli thioredoxin showed that all three proteins have a similar overall polypeptide fold. An area of the protein surface at the active site containing Arg 8, Cys 11, Pro 12, Tyr 13, Ile 38, Thr 58, Val 59, Pro 60, Gly 71, Tyr 72, and Thr 73 is proposed as a possible site for interaction with other proteins, in particular ribonucleotide reductase. It was found that this area corresponds to previously proposed interaction sites in T4 glutaredoxin and E. coli thioredoxin. The solvent-accessible surface area at the active site of E. coli glutaredoxin showed a general trend to increase upon reduction. Only the sulfhydryl group of Cys 11 is exposed to the solvent, whereas that of Cys 14 is buried and solvent inaccessible.
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(as it appears on PubMed at http://www.pubmed.gov), where 1304339 is the PubMed ID number.
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{{ABSTRACT_PUBMED_1304339}}
==About this Structure==
==About this Structure==
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1GRX 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=1GRX OCA].
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1GRX 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=1GRX OCA].
==Reference==
==Reference==
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[[Category: Wuthrich, K.]]
[[Category: Wuthrich, K.]]
[[Category: Electron transport]]
[[Category: Electron transport]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 17:56:09 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 05:58:33 2008''

Revision as of 02:58, 1 July 2008

Image:1grx.png

Template:STRUCTURE 1grx

STRUCTURE OF E. COLI GLUTAREDOXIN

Template:ABSTRACT PUBMED 1304339

About this Structure

1GRX is a Single protein structure of sequence from Escherichia coli. Full experimental information is available from OCA.

Reference

NMR structure of oxidized Escherichia coli glutaredoxin: comparison with reduced E. coli glutaredoxin and functionally related proteins., Xia TH, Bushweller JH, Sodano P, Billeter M, Bjornberg O, Holmgren A, Wuthrich K, Protein Sci. 1992 Mar;1(3):310-21. PMID:1304339

Page seeded by OCA on Tue Jul 1 05:58:33 2008

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