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3d5j

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Revision as of 16:12, 8 February 2016

Structure of yeast Grx2-C30S mutant with glutathionyl mixed disulfide

Structural highlights

3d5j is a 2 chain structure with sequence from Atcc 18824. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	3d4m
Gene:	GRX2, TTR, TTR1, YDR513W, D9719.17 (ATCC 18824)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[GLRX2_YEAST] Multifunctional enzyme with glutathione-dependent oxidoreductase, glutathione peroxidase and glutathione S-transferase (GST) activity. The disulfide bond functions as an electron carrier in the glutathione-dependent synthesis of deoxyribonucleotides by the enzyme ribonucleotide reductase. In addition, it is also involved in reducing cytosolic protein- and non-protein-disulfides in a coupled system with glutathione reductase. Required for resistance to reactive oxygen species (ROS) by directly reducing hydroperoxides and for the detoxification of ROS-mediated damage.^[1] ^[2] ^[3]

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 PubMed

Glutaredoxins (Grxs) are small (9-12 kDa) heat-stable proteins that are ubiquitously distributed. In Saccharomyces cerevisiae, seven Grx enzymes have been identified. Two of them (yGrx1 and yGrx2) are dithiolic, possessing a conserved Cys-Pro-Tyr-Cys motif. Here, we show that yGrx2 has a specific activity 15 times higher than that of yGrx1, although these two oxidoreductases share 64% identity and 85% similarity with respect to their amino acid sequences. Further characterization of the enzymatic activities through two-substrate kinetics analysis revealed that yGrx2 possesses a lower K(M) for glutathione and a higher turnover than yGrx1. To better comprehend these biochemical differences, the pK(a) of the N-terminal active-site cysteines (Cys27) of these two proteins and of the yGrx2-C30S mutant were determined. Since the pK(a) values of the yGrx1 and yGrx2 Cys27 residues are very similar, these parameters cannot account for the difference observed between their specific activities. Therefore, crystal structures of yGrx2 in the oxidized form and with a glutathionyl mixed disulfide were determined at resolutions of 2.05 and 1.91 A, respectively. Comparisons of yGrx2 structures with the recently determined structures of yGrx1 provided insights into their remarkable functional divergence. We hypothesize that the substitutions of Ser23 and Gln52 in yGrx1 by Ala23 and Glu52 in yGrx2 modify the capability of the active-site C-terminal cysteine to attack the mixed disulfide between the N-terminal active-site cysteine and the glutathione molecule. Mutagenesis studies supported this hypothesis. The observed structural and functional differences between yGrx1 and yGrx2 may reflect variations in substrate specificity.

Structural aspects of the distinct biochemical properties of glutaredoxin 1 and glutaredoxin 2 from Saccharomyces cerevisiae.,Discola KF, de Oliveira MA, Rosa Cussiol JR, Monteiro G, Barcena JA, Porras P, Padilla CA, Guimaraes BG, Netto LE J Mol Biol. 2009 Jan 23;385(3):889-901. Epub 2008 Oct 28. PMID:18992757^[4]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Luikenhuis S, Perrone G, Dawes IW, Grant CM. The yeast Saccharomyces cerevisiae contains two glutaredoxin genes that are required for protection against reactive oxygen species. Mol Biol Cell. 1998 May;9(5):1081-91. PMID:9571241
↑ Collinson EJ, Wheeler GL, Garrido EO, Avery AM, Avery SV, Grant CM. The yeast glutaredoxins are active as glutathione peroxidases. J Biol Chem. 2002 May 10;277(19):16712-7. Epub 2002 Mar 1. PMID:11875065 doi:http://dx.doi.org/10.1074/jbc.M111686200
↑ Collinson EJ, Grant CM. Role of yeast glutaredoxins as glutathione S-transferases. J Biol Chem. 2003 Jun 20;278(25):22492-7. Epub 2003 Apr 8. PMID:12684511 doi:http://dx.doi.org/10.1074/jbc.M301387200
↑ Discola KF, de Oliveira MA, Rosa Cussiol JR, Monteiro G, Barcena JA, Porras P, Padilla CA, Guimaraes BG, Netto LE. Structural aspects of the distinct biochemical properties of glutaredoxin 1 and glutaredoxin 2 from Saccharomyces cerevisiae. J Mol Biol. 2009 Jan 23;385(3):889-901. Epub 2008 Oct 28. PMID:18992757 doi:S0022-2836(08)01340-5

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3d5j"

@@ Line 2: / Line 2: @@
 <StructureSection load='3d5j' size='340' side='right' caption='[[3d5j]], [[Resolution|resolution]] 1.91&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3d5j]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3D5J OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3D5J FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3d5j]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3D5J OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3D5J FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GSH:GLUTATHIONE'>GSH</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3d4m|3d4m]]</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GRX2, TTR, TTR1, YDR513W, D9719.17 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 Saccharomyces cerevisiae])</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GRX2, TTR, TTR1, YDR513W, D9719.17 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3d5j FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3d5j OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3d5j RCSB], [http://www.ebi.ac.uk/pdbsum/3d5j PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3d5j FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3d5j OCA], [http://pdbe.org/3d5j PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3d5j RCSB], [http://www.ebi.ac.uk/pdbsum/3d5j PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 18: / Line 18: @@
     <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/chain_selection.php?pdb_ID=2ata ConSurf].
+</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=3d5j ConSurf].
 <div style="clear:both"></div>
 <div style="background-color:#fffaf0;">
@@ Line 28: / Line 28: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 3d5j" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Saccharomyces cerevisiae]]
+[[Category: Atcc 18824]]
 [[Category: Barcena, J A]]
 [[Category: Discola, K F]]

3d5j

From Proteopedia

Revision as of 16:12, 8 February 2016

Structure of yeast Grx2-C30S mutant with glutathionyl mixed disulfide

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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