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==A SURFACE MUTANT (G82R) OF A HUMAN ALPHA-GLUTATHIONE S-TRANSFERASE SHOWS DECREASED THERMAL STABILITY AND A NEW MODE OF MOLECULAR ASSOCIATION IN THE CRYSTAL==
==A SURFACE MUTANT (G82R) OF A HUMAN ALPHA-GLUTATHIONE S-TRANSFERASE SHOWS DECREASED THERMAL STABILITY AND A NEW MODE OF MOLECULAR ASSOCIATION IN THE CRYSTAL==
<StructureSection load='1ags' size='340' side='right' caption='[[1ags]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
<StructureSection load='1ags' size='340' side='right'caption='[[1ags]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1ags]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AGS OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1AGS FirstGlance]. <br>
<table><tr><td colspan='2'>[[1ags]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AGS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1AGS FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GTX:S-HEXYLGLUTATHIONE'>GTX</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5&#8491;</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Glutathione_transferase Glutathione transferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.5.1.18 2.5.1.18] </span></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GTX:S-HEXYLGLUTATHIONE'>GTX</scene></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=1ags FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ags OCA], [http://pdbe.org/1ags PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ags RCSB], [http://www.ebi.ac.uk/pdbsum/1ags PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1ags ProSAT]</span></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=1ags FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ags OCA], [https://pdbe.org/1ags PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ags RCSB], [https://www.ebi.ac.uk/pdbsum/1ags PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ags ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/GSTA2_HUMAN GSTA2_HUMAN]] Conjugation of reduced glutathione to a wide number of exogenous and endogenous hydrophobic electrophiles.  
[https://www.uniprot.org/uniprot/GSTA2_HUMAN GSTA2_HUMAN] Conjugation of reduced glutathione to a wide number of exogenous and endogenous hydrophobic electrophiles.
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
Check<jmol>
   <jmolCheckbox>
   <jmolCheckbox>
     <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ag/1ags_consurf.spt"</scriptWhenChecked>
     <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ag/1ags_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
     <text>to colour the structure by Evolutionary Conservation</text>
Line 20: Line 20:
</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=1ags 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=1ags ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
A chimeric enzyme (GST121) of the human alpha-glutathione S-transferases GST1-1 and GST2-2, which has improved catalytic efficiency and thermostability from its wild-type parent proteins, has been crystallized in a space group that is isomorphous with that reported for crystals of GST1-1. However, a single-site (G82R) mutant of GST121, which exhibits a significant reduction both in vitro and in vivo in protein thermostability, forms crystals that are not isomorphous with GST1-1. The mutant protein crystallizes in space group P2(1)2(1)2(1), with cell dimensions a = 49.5, b = 92.9, c = 115.9 A, and one dimer per asymmetric unit. Preliminary crystallographic results show that a mutation of the surface residue Gly 82 from a neutral to a charged residue causes new salt bridges to be formed among the GST dimers, suggesting that the G82R mutant might aggregate more readily than does GST121 in solution, resulting in a change of its solution properties.
A surface mutant (G82R) of a human alpha-glutathione S-transferase shows decreased thermal stability and a new mode of molecular association in the crystal.,Zeng K, Rose JP, Chen HC, Strickland CL, Tu CP, Wang BC Proteins. 1994 Nov;20(3):259-63. PMID:7892174<ref>PMID:7892174</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1ags" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Glutathione S-transferase|Glutathione S-transferase]]
*[[Glutathione S-transferase 3D structures|Glutathione S-transferase 3D structures]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Glutathione transferase]]
[[Category: Large Structures]]
[[Category: Rose, J P]]
[[Category: Synthetic construct]]
[[Category: Wang, B C]]
[[Category: Rose JP]]
[[Category: Zeng, K]]
[[Category: Wang BC]]
[[Category: Zeng K]]

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