2csd | pdb_00002csd

Crystal structure of Topoisomerase V (61 kDa fragment)

spinqualitylabelsall models 2csd, resolution 2.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2csd is a 2 chain structure with sequence from Methanopyrus kandleri. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 2csb Resources: FirstGlance, OCA, RCSB, PDBsum 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 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Topoisomerase

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