View source for 2csd

==Crystal structure of Topoisomerase V (61 kDa fragment)==
<StructureSection load='2csd' size='340' side='right' caption='[[2csd]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2csd]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Methanopyrus_kandleri Methanopyrus kandleri]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2CSD OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2CSD FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2csb|2csb]]</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=2csd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2csd OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2csd RCSB], [http://www.ebi.ac.uk/pdbsum/2csd PDBsum]</span></td></tr>
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== Publication Abstract from PubMed ==
Topoisomerases are involved in controlling and maintaining the topology of DNA and are present in all kingdoms of life. Unlike all other types of topoisomerases, similar type IB enzymes have only been identified in bacteria and eukarya. The only putative type IB topoisomerase in archaea is represented by Methanopyrus kandleri topoisomerase V. Despite several common functional characteristics, topoisomerase V shows no sequence similarity to other members of the same type. The structure of the 61 kDa N-terminal fragment of topoisomerase V reveals no structural similarity to other topoisomerases. Furthermore, the structure of the active site region is different, suggesting no conservation in the cleavage and religation mechanism. Additionally, the active site is buried, indicating the need of a conformational change for activity. The presence of a topoisomerase in archaea with a unique structure suggests the evolution of a separate mechanism to alter DNA.

Structure of the N-terminal fragment of topoisomerase V reveals a new family of topoisomerases.,Taneja B, Patel A, Slesarev A, Mondragon A EMBO J. 2006 Jan 25;25(2):398-408. Epub 2006 Jan 5. PMID:16395333<ref>PMID:16395333</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[Topoisomerase|Topoisomerase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Methanopyrus kandleri]]
[[Category: Mondragon, A.]]
[[Category: Patel, A.]]
[[Category: Slesarev, A.]]
[[Category: Taneja, B.]]
[[Category: Helix-hairpin-helix]]
[[Category: Helix-turn-helix]]
[[Category: Hhh motif]]
[[Category: Isomerase]]
[[Category: Three helix bundle]]
[[Category: Topoisomerase ib]]
[[Category: Topoisomerase v]]