1m9b

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[[Image:1m9b.gif|left|200px]]
 
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==Crystal structure of the 26 kDa glutathione S-transferase from Schistosoma japonicum complexed with gamma-glutamyl[S-(2-iodobenzyl)cysteinyl]glycine==
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The line below this paragraph, containing "STRUCTURE_1m9b", creates the "Structure Box" on the page.
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<StructureSection load='1m9b' size='340' side='right'caption='[[1m9b]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1m9b]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Schistosoma_japonicum Schistosoma japonicum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M9B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1M9B FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.6&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IBG:GAMMA-GLUTAMYL[S-(2-IODOBENZYL)CYSTEINYL]GLYCINE'>IBG</scene></td></tr>
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{{STRUCTURE_1m9b| PDB=1m9b | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1m9b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1m9b OCA], [https://pdbe.org/1m9b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1m9b RCSB], [https://www.ebi.ac.uk/pdbsum/1m9b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1m9b ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/GST26_SCHJA GST26_SCHJA] Conjugation of reduced glutathione to a wide number of exogenous and endogenous hydrophobic electrophiles. GST isoenzymes appear to play a central role in the parasite detoxification system. Other functions are also suspected including a role in increasing the solubility of haematin in the parasite gut.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/m9/1m9b_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=1m9b ConSurf].
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<div style="clear:both"></div>
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'''Crystal structure of the 26 kDa glutathione S-transferase from Schistosoma japonicum complexed with gamma-glutamyl[S-(2-iodobenzyl)cysteinyl]glycine'''
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==See Also==
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*[[Glutathione S-transferase 3D structures|Glutathione S-transferase 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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The 26-kDa glutathione S-transferase from Schistosoma japonicum (Sj26GST), a helminth worm that causes schistosomiasis, catalyzes the conjugation of glutathione with toxic secondary products of membrane lipid peroxidation. Crystal structures of Sj26GST in complex with glutathione sulfonate (Sj26GSTSLF), S-hexyl glutathione (Sj26GSTHEX), and S-2-iodobenzyl glutathione (Sj26GSTIBZ) allow characterization of the electrophile binding site (H site) of Sj26GST. The S-hexyl and S-2-iodobenzyl moieties of these product analogs bind in a pocket defined by side-chains from the beta1-alpha1 loop (Tyr7, Trp8, Ile10, Gly12, Leu13), helix alpha4 (Arg103, Tyr104, Ser107, Tyr111), and the C-terminal coil (Gln204, Gly205, Trp206, Gln207). Changes in the Ser107 and Gln204 dihedral angles make the H site more hydrophobic in the Sj26GSTHEX complex relative to the ligand-free structure. These structures, together with docking studies, indicate a possible binding mode of Sj26GST to its physiologic substrates 4-hydroxynon-2-enal (4HNE), trans-non-2-enal (NE), and ethacrynic acid (EA). In this binding mode, hydrogen bonds of Tyr111 and Gln207 to the carbonyl oxygen atoms of 4HNE, NE, and EA could orient the substrates and enhance their electrophilicity to promote conjugation with glutathione.
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[[Category: Large Structures]]
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==About this Structure==
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1M9B is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Schistosoma_japonicum Schistosoma japonicum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M9B OCA].
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==Reference==
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Characterization of the electrophile binding site and substrate binding mode of the 26-kDa glutathione S-transferase from Schistosoma japonicum., Cardoso RM, Daniels DS, Bruns CM, Tainer JA, Proteins. 2003 Apr 1;51(1):137-46. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12596270 12596270]
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[[Category: Glutathione transferase]]
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[[Category: Schistosoma japonicum]]
[[Category: Schistosoma japonicum]]
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[[Category: Single protein]]
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[[Category: Bruns CM]]
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[[Category: Bruns, C M.]]
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[[Category: Cardoso RMF]]
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[[Category: Cardoso, R M.F.]]
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[[Category: Daniels DS]]
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[[Category: Daniels, D S.]]
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[[Category: Tainer JA]]
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[[Category: Tainer, J A.]]
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[[Category: Antigen]]
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[[Category: Glutathione transferase]]
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[[Category: Multigene family]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 00:47:11 2008''
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Current revision

Crystal structure of the 26 kDa glutathione S-transferase from Schistosoma japonicum complexed with gamma-glutamyl[S-(2-iodobenzyl)cysteinyl]glycine

PDB ID 1m9b

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