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[[Image: | ==Crystal structure of the topoisomerase VI holoenzyme from Methanosarcina mazei== | ||
<StructureSection load='2q2e' size='340' side='right' caption='[[2q2e]], [[Resolution|resolution]] 4.00Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2q2e]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Methanosarcina_mazei Methanosarcina mazei]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2Q2E OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2Q2E FirstGlance]. <br> | |||
</td></tr><tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">top6A ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2209 Methanosarcina mazei]), top6B ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2209 Methanosarcina mazei])</td></tr> | |||
<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA_topoisomerase_(ATP-hydrolyzing) DNA topoisomerase (ATP-hydrolyzing)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.99.1.3 5.99.1.3] </span></td></tr> | |||
<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=2q2e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2q2e OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2q2e RCSB], [http://www.ebi.ac.uk/pdbsum/2q2e PDBsum]</span></td></tr> | |||
<table> | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/q2/2q2e_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<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]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Type II topoisomerases help disentangle chromosomes to facilitate cell division. To advance understanding of the structure and dynamics of these essential enzymes, we have determined the crystal structure of an archaeal type IIB topoisomerase, topo VI, at 4.0-A resolution. The 220-kDa heterotetramer adopts a 'twin-gate' architecture, in which a pair of ATPase domains at one end of the enzyme is poised to coordinate DNA movements into the enzyme and through a set of DNA-cleaving domains at the other end. Small-angle X-ray scattering studies show that nucleotide binding elicits a major structural reorganization that is propagated to the enzyme's DNA-cleavage center, explaining how ATP is coupled to DNA capture and strand scission. These data afford important insights into the mechanisms of topo VI and related proteins, including type IIA topoisomerases and the Spo11 meiotic recombination endonuclease. | |||
Holoenzyme assembly and ATP-mediated conformational dynamics of topoisomerase VI.,Corbett KD, Benedetti P, Berger JM Nat Struct Mol Biol. 2007 Jul;14(7):611-9. Epub 2007 Jul 1. PMID:17603498<ref>PMID:17603498</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
==See Also== | ==See Also== | ||
*[[Topoisomerase|Topoisomerase]] | *[[Topoisomerase|Topoisomerase]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
</StructureSection> | |||
[[Category: Methanosarcina mazei]] | [[Category: Methanosarcina mazei]] | ||
[[Category: Benedetti, P.]] | [[Category: Benedetti, P.]] | ||
Revision as of 09:19, 29 September 2014
Crystal structure of the topoisomerase VI holoenzyme from Methanosarcina mazeiCrystal structure of the topoisomerase VI holoenzyme from Methanosarcina mazei
Structural highlights
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 PubMedType II topoisomerases help disentangle chromosomes to facilitate cell division. To advance understanding of the structure and dynamics of these essential enzymes, we have determined the crystal structure of an archaeal type IIB topoisomerase, topo VI, at 4.0-A resolution. The 220-kDa heterotetramer adopts a 'twin-gate' architecture, in which a pair of ATPase domains at one end of the enzyme is poised to coordinate DNA movements into the enzyme and through a set of DNA-cleaving domains at the other end. Small-angle X-ray scattering studies show that nucleotide binding elicits a major structural reorganization that is propagated to the enzyme's DNA-cleavage center, explaining how ATP is coupled to DNA capture and strand scission. These data afford important insights into the mechanisms of topo VI and related proteins, including type IIA topoisomerases and the Spo11 meiotic recombination endonuclease. Holoenzyme assembly and ATP-mediated conformational dynamics of topoisomerase VI.,Corbett KD, Benedetti P, Berger JM Nat Struct Mol Biol. 2007 Jul;14(7):611-9. Epub 2007 Jul 1. PMID:17603498[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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