1wp5

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[[Image:1wp5.png|left|200px]]
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==Crystal structure of the C-terminal domain of DNA topoisomerase IV==
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<StructureSection load='1wp5' size='340' side='right' caption='[[1wp5]], [[Resolution|resolution]] 1.79&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1wp5]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Geobacillus_stearothermophilus Geobacillus stearothermophilus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1WP5 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1WP5 FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
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<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ParC ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1422 Geobacillus stearothermophilus])</td></tr>
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<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1wp5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1wp5 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1wp5 RCSB], [http://www.ebi.ac.uk/pdbsum/1wp5 PDBsum]</span></td></tr>
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<table>
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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/wp/1wp5_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/chain_selection.php?pdb_ID=2ata ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Bacteria possess two closely related yet functionally distinct essential type IIA topoisomerases (Topos). DNA gyrase supports replication and transcription with its unique supercoiling activity, whereas Topo IV preferentially relaxes (+) supercoils and is a decatenating enzyme required for chromosome segregation. Here we report the crystal structure of the C-terminal domain of Topo IV ParC subunit (ParC-CTD) from Bacillus stearothermophilus and provide a structure-based explanation for how Topo IV and DNA gyrase execute distinct activities. Although the topological connectivity of ParC-CTD is similar to the recently determined CTD structure of DNA gyrase GyrA subunit (GyrA-CTD), ParC-CTD surprisingly folds as a previously unseen broken form of a six-bladed beta-propeller. Propeller breakage is due to the absence of a DNA gyrase-specific GyrA box motif, resulting in the reduction of curvature of the proposed DNA binding region, which explains why ParC-CTD is less efficient than GyrA-CTD in mediating DNA bending, a difference that leads to divergent activities of the two homologous enzymes. Moreover, we found that the topology of the propeller blades observed in ParC-CTD and GyrA-CTD can be achieved from a concerted beta-hairpin invasion-induced fold change event of a canonical six-bladed beta-propeller; hence, we proposed to name this new fold as "hairpin-invaded beta-propeller" to highlight the high degree of similarity and a potential evolutionary linkage between them. The possible role of ParC-CTD as a geometry facilitator during various catalytic events and the evolutionary relationships between prokaryotic type IIA Topos have also been discussed according to these new structural insights.
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{{STRUCTURE_1wp5| PDB=1wp5 | SCENE= }}
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Structure of the topoisomerase IV C-terminal domain: a broken beta-propeller implies a role as geometry facilitator in catalysis.,Hsieh TJ, Farh L, Huang WM, Chan NL J Biol Chem. 2004 Dec 31;279(53):55587-93. Epub 2004 Oct 4. PMID:15466871<ref>PMID:15466871</ref>
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===Crystal structure of the C-terminal domain of DNA topoisomerase IV===
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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{{ABSTRACT_PUBMED_15466871}}
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==About this Structure==
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[[1wp5]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Geobacillus_stearothermophilus Geobacillus stearothermophilus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1WP5 OCA].
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==See Also==
==See Also==
*[[Topoisomerase|Topoisomerase]]
*[[Topoisomerase|Topoisomerase]]
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:015466871</ref><references group="xtra"/>
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__TOC__
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</StructureSection>
[[Category: Geobacillus stearothermophilus]]
[[Category: Geobacillus stearothermophilus]]
[[Category: Chan, N L.]]
[[Category: Chan, N L.]]

Revision as of 21:52, 28 September 2014

Crystal structure of the C-terminal domain of DNA topoisomerase IV

1wp5, resolution 1.79Å

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