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3qx3

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Revision as of 22:05, 4 August 2016

Human topoisomerase IIbeta in complex with DNA and etoposide

Structural highlights

3qx3 is a 6 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	3qxk
Gene:	TOP2B (HUMAN)
Activity:	DNA topoisomerase (ATP-hydrolyzing), with EC number 5.99.1.3
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[TOP2B_HUMAN] Control of topological states of DNA by transient breakage and subsequent rejoining of DNA strands. Topoisomerase II makes double-strand breaks. Indirectly involved in vitamin D-coupled transcription regulation via its association with the WINAC complex, a chromatin-remodeling complex recruited by vitamin D receptor (VDR), which is required for the ligand-bound VDR-mediated transrepression of the CYP27B1 gene.^[1] ^[2]

Publication Abstract from PubMed

Type II topoisomerases (TOP2s) resolve the topological problems of DNA by transiently cleaving both strands of a DNA duplex to form a cleavage complex through which another DNA segment can be transported. Several widely prescribed anticancer drugs increase the population of TOP2 cleavage complex, which leads to TOP2-mediated chromosome DNA breakage and death of cancer cells. We present the crystal structure of a large fragment of human TOP2beta complexed to DNA and to the anticancer drug etoposide to reveal structural details of drug-induced stabilization of a cleavage complex. The interplay between the protein, the DNA, and the drug explains the structure-activity relations of etoposide derivatives and the molecular basis of drug-resistant mutations. The analysis of protein-drug interactions provides information applicable for developing an isoform-specific TOP2-targeting strategy.

Structural basis of type II topoisomerase inhibition by the anticancer drug etoposide.,Wu CC, Li TK, Farh L, Lin LY, Lin TS, Yu YJ, Yen TJ, Chiang CW, Chan NL Science. 2011 Jul 22;333(6041):459-62. PMID:21778401^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ West KL, Meczes EL, Thorn R, Turnbull RM, Marshall R, Austin CA. Mutagenesis of E477 or K505 in the B' domain of human topoisomerase II beta increases the requirement for magnesium ions during strand passage. Biochemistry. 2000 Feb 15;39(6):1223-33. PMID:10684600
↑ Kitagawa H, Fujiki R, Yoshimura K, Mezaki Y, Uematsu Y, Matsui D, Ogawa S, Unno K, Okubo M, Tokita A, Nakagawa T, Ito T, Ishimi Y, Nagasawa H, Matsumoto T, Yanagisawa J, Kato S. The chromatin-remodeling complex WINAC targets a nuclear receptor to promoters and is impaired in Williams syndrome. Cell. 2003 Jun 27;113(7):905-17. PMID:12837248
↑ Wu CC, Li TK, Farh L, Lin LY, Lin TS, Yu YJ, Yen TJ, Chiang CW, Chan NL. Structural basis of type II topoisomerase inhibition by the anticancer drug etoposide. Science. 2011 Jul 22;333(6041):459-62. PMID:21778401 doi:10.1126/science.1204117

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3qx3"

@@ Line 1: / Line 1: @@
 ==Human topoisomerase IIbeta in complex with DNA and etoposide==
 <StructureSection load='3qx3' size='340' side='right' caption='[[3qx3]], [[Resolution|resolution]] 2.16&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3qx3]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3QX3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3QX3 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3qx3]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3QX3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3QX3 FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EVP:(5S,5AR,8AR,9R)-9-(4-HYDROXY-3,5-DIMETHOXYPHENYL)-8-OXO-5,5A,6,8,8A,9-HEXAHYDROFURO[3,4 6,7]NAPHTHO[2,3-D][1,3]DIOXOL-5-YL+4,6-O-[(1R)-ETHYLIDENE]-BETA-D-GLUCOPYRANOSIDE'>EVP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3qxk|3qxk]]</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">TOP2B ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">TOP2B ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
 <tr id='activity'><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 id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3qx3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3qx3 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3qx3 RCSB], [http://www.ebi.ac.uk/pdbsum/3qx3 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3qx3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3qx3 OCA], [http://pdbe.org/3qx3 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3qx3 RCSB], [http://www.ebi.ac.uk/pdbsum/3qx3 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3qx3 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 19: / Line 20: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 3qx3" style="background-color:#fffaf0;"></div>
 ==See Also==
@@ Line 26: / Line 28: @@
 __TOC__
 </StructureSection>
-[[Category: Homo sapiens]]
+[[Category: Human]]
 [[Category: Chan, N L]]
 [[Category: Chiang, C W]]

3qx3

From Proteopedia

Revision as of 22:05, 4 August 2016

Human topoisomerase IIbeta in complex with DNA and etoposide

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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