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1sf8

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[[Image:1sf8.gif|left|200px]]<br /><applet load="1sf8" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1sf8, resolution 2.60&Aring;" />
 
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'''Crystal structure of the carboxy-terminal domain of htpG, the E. coli Hsp90'''<br />
 
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==Overview==
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==Crystal structure of the carboxy-terminal domain of htpG, the E. coli Hsp90==
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Hsp90 is a ubiquitous, well-conserved molecular chaperone involved in the folding and stabilization of diverse proteins. Beyond its capacity for general protein folding, Hsp90 influences a wide array of cellular signaling pathways that underlie key biological and disease processes. It has been proposed that Hsp90 functions as a molecular clamp, dimerizing through its carboxy-terminal domain and utilizing ATP binding and hydrolysis to drive large conformational changes including transient dimerization of the amino-terminal and middle domains. We have determined the 2.6 A X-ray crystal structure of the carboxy-terminal domain of htpG, the Escherichia coli Hsp90. This structure reveals a novel fold and that dimerization is dependent upon the formation of a four-helix bundle. Remarkably, proximal to the helical dimerization motif, each monomer projects a short helix into solvent. The location, flexibility, and amphipathic character of this helix suggests that it may play a role in substrate binding and hence chaperone activity.
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<StructureSection load='1sf8' size='340' side='right'caption='[[1sf8]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1sf8]] is a 8 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=1SF8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1SF8 FirstGlance]. <br>
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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=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</scene></td></tr>
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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=1sf8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sf8 OCA], [https://pdbe.org/1sf8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1sf8 RCSB], [https://www.ebi.ac.uk/pdbsum/1sf8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1sf8 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/HTPG_ECOLI HTPG_ECOLI] Molecular chaperone. Has ATPase activity.[HAMAP-Rule:MF_00505]
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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/sf/1sf8_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=1sf8 ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1SF8 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] with <scene name='pdbligand=NI:'>NI</scene> and <scene name='pdbligand=CL:'>CL</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SF8 OCA].
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*[[Heat Shock Protein structures|Heat Shock Protein structures]]
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__TOC__
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==Reference==
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</StructureSection>
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The crystal structure of the carboxy-terminal dimerization domain of htpG, the Escherichia coli Hsp90, reveals a potential substrate binding site., Harris SF, Shiau AK, Agard DA, Structure. 2004 Jun;12(6):1087-97. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15274928 15274928]
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[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Agard, D A.]]
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[[Category: Agard DA]]
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[[Category: Harris, S F.]]
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[[Category: Harris SF]]
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[[Category: Shiau, A K.]]
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[[Category: Shiau AK]]
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[[Category: CL]]
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[[Category: NI]]
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[[Category: exposed amphipathic helix]]
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[[Category: four helix bundle dimerization interface]]
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[[Category: three stranded beta sheet]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 15:00:52 2008''
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Current revision

Crystal structure of the carboxy-terminal domain of htpG, the E. coli Hsp90

PDB ID 1sf8

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