1fov: Difference between revisions
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|RELATEDENTRY=[[3grx|3GRX]] | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1fov FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fov OCA], [http://www.ebi.ac.uk/pdbsum/1fov PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1fov RCSB]</span> | |||
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[[Category: cis pro 53]] | [[Category: cis pro 53]] | ||
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Revision as of 20:27, 30 March 2008
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| Related: | 3GRX
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
GLUTAREDOXIN 3 FROM ESCHERICHIA COLI IN THE FULLY OXIDIZED FORM
OverviewOverview
A high precision NMR structure of oxidized glutaredoxin 3 [C65Y] from Escherichia coli has been determined. The conformation of the active site including the disulphide bridge is highly similar to those in glutaredoxins from pig liver and T4 phage. A comparison with the previously determined structure of glutaredoxin 3 [C14S, C65Y] in a complex with glutathione reveals conformational changes between the free and substrate-bound form which includes the sidechain of the conserved, active site tyrosine residue. In the oxidized form this tyrosine is solvent exposed, while it adopts a less exposed conformation, stabilized by hydrogen bonds, in the mixed disulfide with glutathione. The structures further suggest that the formation of a covalent linkage between glutathione and glutaredoxin 3 is necessary in order to induce these structural changes upon binding of the glutathione peptide. This could explain the observed low affinity of glutaredoxins for S-blocked glutathione analogues, in spite of the fact that glutaredoxins are highly specific reductants of glutathione mixed disulfides.
About this StructureAbout this Structure
1FOV is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
ReferenceReference
NMR structure of oxidized glutaredoxin 3 from Escherichia coli., Nordstrand K, Sandstrom A, Aslund F, Holmgren A, Otting G, Berndt KD, J Mol Biol. 2000 Oct 27;303(3):423-32. PMID:11031118
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