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[[Image:2p5r.jpg|left|200px]]
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{{STRUCTURE_2p5r|  PDB=2p5r  |  SCENE=  }}
'''Crystal structure of the poplar glutathione peroxidase 5 in the oxidized form'''


==Crystal structure of the poplar glutathione peroxidase 5 in the oxidized form==
<StructureSection load='2p5r' size='340' side='right'caption='[[2p5r]], [[Resolution|resolution]] 2.45&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2p5r]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Populus_trichocarpa_x_Populus_deltoides Populus trichocarpa x Populus deltoides]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2P5R OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2P5R FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.45&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2p5r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2p5r OCA], [https://pdbe.org/2p5r PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2p5r RCSB], [https://www.ebi.ac.uk/pdbsum/2p5r PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2p5r ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A3FNZ8_9ROSI A3FNZ8_9ROSI]
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/p5/2p5r_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2p5r ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Glutathione peroxidases (GPXs) are a group of enzymes that regulate the levels of reactive oxygen species in cells and tissues, and protect them against oxidative damage. Contrary to most of their counterparts in animal cells, the higher plant GPX homologues identified so far possess cysteine instead of selenocysteine in their active site. Interestingly, the plant GPXs are not dependent on glutathione but rather on thioredoxin as their in vitro electron donor. We have determined the crystal structures of the reduced and oxidized form of Populus trichocarpaxdeltoides GPX5 (PtGPX5), using a selenomethionine derivative. PtGPX5 exhibits an overall structure similar to that of the known animal GPXs. PtGPX5 crystallized in the assumed physiological dimeric form, displaying a pseudo ten-stranded beta sheet core. Comparison of both redox structures indicates that a drastic conformational change is necessary to bring the two distant cysteine residues together to form an intramolecular disulfide bond. In addition, a computer model of a complex of PtGPX5 and its in vitro recycling partner thioredoxin h1 is proposed on the basis of the crystal packing of the oxidized form enzyme. A possible role of PtGPX5 as a heavy-metal sink is also discussed.


==Overview==
Crystal structures of a poplar thioredoxin peroxidase that exhibits the structure of glutathione peroxidases: insights into redox-driven conformational changes.,Koh CS, Didierjean C, Navrot N, Panjikar S, Mulliert G, Rouhier N, Jacquot JP, Aubry A, Shawkataly O, Corbier C J Mol Biol. 2007 Jul 13;370(3):512-29. Epub 2007 Apr 19. PMID:17531267<ref>PMID:17531267</ref>
Glutathione peroxidases (GPXs) are a group of enzymes that regulate the levels of reactive oxygen species in cells and tissues, and protect them against oxidative damage. Contrary to most of their counterparts in animal cells, the higher plant GPX homologues identified so far possess cysteine instead of selenocysteine in their active site. Interestingly, the plant GPXs are not dependent on glutathione but rather on thioredoxin as their in vitro electron donor. We have determined the crystal structures of the reduced and oxidized form of Populus trichocarpaxdeltoides GPX5 (PtGPX5), using a selenomethionine derivative. PtGPX5 exhibits an overall structure similar to that of the known animal GPXs. PtGPX5 crystallized in the assumed physiological dimeric form, displaying a pseudo ten-stranded beta sheet core. Comparison of both redox structures indicates that a drastic conformational change is necessary to bring the two distant cysteine residues together to form an intramolecular disulfide bond. In addition, a computer model of a complex of PtGPX5 and its in vitro recycling partner thioredoxin h1 is proposed on the basis of the crystal packing of the oxidized form enzyme. A possible role of PtGPX5 as a heavy-metal sink is also discussed.


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
2P5R is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Populus_trichocarpa_x_populus_deltoides Populus trichocarpa x populus deltoides]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2P5R OCA].
</div>
<div class="pdbe-citations 2p5r" style="background-color:#fffaf0;"></div>


==Reference==
==See Also==
Crystal structures of a poplar thioredoxin peroxidase that exhibits the structure of glutathione peroxidases: insights into redox-driven conformational changes., Koh CS, Didierjean C, Navrot N, Panjikar S, Mulliert G, Rouhier N, Jacquot JP, Aubry A, Shawkataly O, Corbier C, J Mol Biol. 2007 Jul 13;370(3):512-29. Epub 2007 Apr 19. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17531267 17531267]
*[[Glutathione peroxidase|Glutathione peroxidase]]
[[Category: Populus trichocarpa x populus deltoides]]
== References ==
[[Category: Single protein]]
<references/>
[[Category: Aubry, A.]]
__TOC__
[[Category: Corbier, C.]]
</StructureSection>
[[Category: Didierjean, C.]]
[[Category: Large Structures]]
[[Category: Jacquot, J P.]]
[[Category: Populus trichocarpa x Populus deltoides]]
[[Category: Koh, C S.]]
[[Category: Aubry A]]
[[Category: Mulliert, G.]]
[[Category: Corbier C]]
[[Category: Navrot, N.]]
[[Category: Didierjean C]]
[[Category: Panjikar, S.]]
[[Category: Jacquot J-P]]
[[Category: Rouhier, N.]]
[[Category: Koh CS]]
[[Category: Shawkataly, O.]]
[[Category: Mulliert G]]
[[Category: Thioredoxin fold]]
[[Category: Navrot N]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May  4 12:25:24 2008''
[[Category: Panjikar S]]
[[Category: Rouhier N]]
[[Category: Shawkataly O]]

Latest revision as of 08:27, 30 October 2024

Crystal structure of the poplar glutathione peroxidase 5 in the oxidized form

2p5r, resolution 2.45Å

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