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1trw

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{{STRUCTURE_1trw| PDB=1trw | SCENE= }}
{{STRUCTURE_1trw| PDB=1trw | SCENE= }}
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'''THE HIGH-RESOLUTION THREE-DIMENSIONAL SOLUTION STRUCTURES OF THE OXIDIZED AND REDUCED STATES OF HUMAN THIOREDOXIN'''
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===THE HIGH-RESOLUTION THREE-DIMENSIONAL SOLUTION STRUCTURES OF THE OXIDIZED AND REDUCED STATES OF HUMAN THIOREDOXIN===
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==Overview==
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BACKGROUND: Thioredoxin is a ubiquitous protein and is involved in a variety of fundamental biological functions. Its active site is conserved and has two redox active cysteines in the sequence Trp-Cys-Gly-Pro-Cys. No structures of the oxidized and reduced states from the same species have been determined at high resolution under the same conditions and using the same methods. Hence, any detailed comparison of the two oxidation states has been previously precluded. RESULTS: The reduced and oxidized states of the (C62A, C69A, C73A) mutant of human thioredoxin have been investigated by multidimensional heteronuclear NMR. Structures for both states were determined on the basis of approximately 28 experimental restraints per residue, and the resulting precision of the two structures is very high. Consequently, subtle differences between the oxidized and reduced states can be reliably assessed and evaluated. Small differences, particularly within and around the active site can be discerned. CONCLUSIONS: Overall, the structures of the reduced and oxidized states of the (C62A, C69A, C73A) mutant of human thioredoxin are very similar (with a backbone atomic root mean square difference of about 0.9 A) and the packing of side chains within the protein core is nearly identical. The conformational change between oxidized and reduced human thioredoxin is very small and localized to areas in spatial proximity to the redox active cysteines. These subtle structural differences, in addition to the restriction of conformational freedom within the active site upon oxidation, may be important for the different activities of thioredoxin involving a variety of target proteins.
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(as it appears on PubMed at http://www.pubmed.gov), where 7922028 is the PubMed ID number.
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{{ABSTRACT_PUBMED_7922028}}
==About this Structure==
==About this Structure==
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1TRW is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TRW OCA].
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1TRW is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TRW OCA].
==Reference==
==Reference==
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[[Category: Qin, J.]]
[[Category: Qin, J.]]
[[Category: Electron transport]]
[[Category: Electron transport]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 10:18:01 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 15:16:40 2008''

Revision as of 12:16, 29 July 2008

Image:1trw.png

Template:STRUCTURE 1trw

THE HIGH-RESOLUTION THREE-DIMENSIONAL SOLUTION STRUCTURES OF THE OXIDIZED AND REDUCED STATES OF HUMAN THIOREDOXIN

Template:ABSTRACT PUBMED 7922028

About this Structure

1TRW is a Single protein structure of sequence from Homo sapiens. Full experimental information is available from OCA.

Reference

The high-resolution three-dimensional solution structures of the oxidized and reduced states of human thioredoxin., Qin J, Clore GM, Gronenborn AM, Structure. 1994 Jun 15;2(6):503-22. PMID:7922028

Page seeded by OCA on Tue Jul 29 15:16:40 2008

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