1ff3: Difference between revisions
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<StructureSection load='1ff3' size='340' side='right'caption='[[1ff3]], [[Resolution|resolution]] 1.90Å' scene=''> | <StructureSection load='1ff3' size='340' side='right'caption='[[1ff3]], [[Resolution|resolution]] 1.90Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1ff3]] is a 3 chain structure with sequence from [ | <table><tr><td colspan='2'>[[1ff3]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FF3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1FF3 FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9Å</td></tr> | ||
<tr id=' | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CAS:S-(DIMETHYLARSENIC)CYSTEINE'>CAS</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1ff3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ff3 OCA], [https://pdbe.org/1ff3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ff3 RCSB], [https://www.ebi.ac.uk/pdbsum/1ff3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ff3 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ff/1ff3_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ff/1ff3_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/ | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </jmolCheckbox> | ||
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[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Aubry | [[Category: Aubry A]] | ||
[[Category: Azza | [[Category: Azza S]] | ||
[[Category: Boschi-Muller | [[Category: Boschi-Muller S]] | ||
[[Category: Branlant | [[Category: Branlant G]] | ||
[[Category: Cobessi | [[Category: Cobessi D]] | ||
[[Category: Tete-Favier | [[Category: Tete-Favier F]] | ||
Latest revision as of 02:58, 21 November 2024
STRUCTURE OF THE PEPTIDE METHIONINE SULFOXIDE REDUCTASE FROM ESCHERICHIA COLISTRUCTURE OF THE PEPTIDE METHIONINE SULFOXIDE REDUCTASE FROM ESCHERICHIA COLI
Structural highlights
Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedBACKGROUND: Peptide methionine sulphoxide reductases catalyze the reduction of oxidized methionine residues in proteins. They are implicated in the defense of organisms against oxidative stress and in the regulation of processes involving peptide methionine oxidation/reduction. These enzymes are found in numerous organisms, from bacteria to mammals and plants. Their primary structure shows no significant similarity to any other known protein. RESULTS: The X-ray structure of the peptide methionine sulphoxide reductase from Escherichia coli was determined at 3 A resolution by the multiple wavelength anomalous dispersion method for the selenomethionine-substituted enzyme, and it was refined to 1.9 A resolution for the native enzyme. The 23 kDa protein is folded into an alpha/beta roll and contains a large proportion of coils. Among the three cysteine residues involved in the catalytic mechanism, Cys-51 is positioned at the N terminus of an alpha helix, in a solvent-exposed area composed of highly conserved amino acids. The two others, Cys-198 and Cys-206, are located in the C-terminal coil. CONCLUSIONS: Sequence alignments show that the overall fold of the peptide methionine sulphoxide reductase from E. coli is likely to be conserved in many species. The characteristics observed in the Cys-51 environment are in agreement with the expected accessibility of the active site of an enzyme that reduces methionine sulphoxides in various proteins. Cys-51 could be activated by the influence of an alpha helix dipole. The involvement of the two other cysteine residues in the catalytic mechanism requires a movement of the C-terminal coil. Several conserved amino acids and water molecules are discussed as potential participants in the reaction. Crystal structure of the Escherichia coli peptide methionine sulphoxide reductase at 1.9 A resolution.,Tete-Favier F, Cobessi D, Boschi-Muller S, Azza S, Branlant G, Aubry A Structure. 2000 Nov 15;8(11):1167-78. PMID:11080639[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References |
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