2rgr

From Proteopedia

(Difference between revisions)

Current revision

Topoisomerase IIA bound to G-segment DNA

Structural highlights

2rgr is a 3 chain structure with sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 3Å
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

TOP2_YEAST Control of topological states of DNA by transient breakage and subsequent rejoining of DNA strands. Topoisomerase II makes double-strand breaks. Essential during mitosis and meiosis for proper segregation of daughter chromosomes.^[1] ^[2]

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 PubMed

Type II topoisomerases disentangle DNA to facilitate chromosome segregation, and represent a major class of therapeutic targets. Although these enzymes have been studied extensively, a molecular understanding of DNA binding has been lacking. Here we present the structure of a complex between the DNA-binding and cleavage core of Saccharomyces cerevisiae Topo II (also known as Top2) and a gate-DNA segment. The structure reveals that the enzyme enforces a 150 degrees DNA bend through a mechanism similar to that of remodelling proteins such as integration host factor. Large protein conformational changes accompany DNA deformation, creating a bipartite catalytic site that positions the DNA backbone near a reactive tyrosine and a coordinated magnesium ion. This configuration closely resembles the catalytic site of type IA topoisomerases, reinforcing an evolutionary link between these structurally and functionally distinct enzymes. Binding of DNA facilitates opening of an enzyme dimerization interface, providing visual evidence for a key step in DNA transport.

Structural basis for gate-DNA recognition and bending by type IIA topoisomerases.,Dong KC, Berger JM Nature. 2007 Dec 20;450(7173):1201-5. PMID:18097402^[3]

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

References

↑ Liu Q, Wang JC. Identification of active site residues in the "GyrA" half of yeast DNA topoisomerase II. J Biol Chem. 1998 Aug 7;273(32):20252-60. PMID:9685374
↑ Schmidt BH, Osheroff N, Berger JM. Structure of a topoisomerase II-DNA-nucleotide complex reveals a new control mechanism for ATPase activity. Nat Struct Mol Biol. 2012 Nov;19(11):1147-54. doi: 10.1038/nsmb.2388. Epub 2012, Sep 30. PMID:23022727 doi:http://dx.doi.org/10.1038/nsmb.2388
↑ Dong KC, Berger JM. Structural basis for gate-DNA recognition and bending by type IIA topoisomerases. Nature. 2007 Dec 20;450(7173):1201-5. PMID:18097402 doi:10.1038/nature06396

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2rgr"

Categories: Large Structures | Saccharomyces cerevisiae | Berger JM | Dong KC

@@ Line 3: / Line 3: @@
 <StructureSection load='2rgr' size='340' side='right'caption='[[2rgr]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2rgr]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2RGR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2RGR FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2rgr]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2RGR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2RGR FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3&#8491;</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">TOP2, TOR3 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824])</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
-<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/DNA_topoisomerase_(ATP-hydrolyzing) DNA topoisomerase (ATP-hydrolyzing)], with EC number [https://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'>[https://proteopedia.org/fgij/fg.htm?mol=2rgr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2rgr OCA], [https://pdbe.org/2rgr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2rgr RCSB], [https://www.ebi.ac.uk/pdbsum/2rgr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2rgr ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[https://www.uniprot.org/uniprot/TOP2_YEAST TOP2_YEAST]] Control of topological states of DNA by transient breakage and subsequent rejoining of DNA strands. Topoisomerase II makes double-strand breaks. Essential during mitosis and meiosis for proper segregation of daughter chromosomes.<ref>PMID:9685374</ref> <ref>PMID:23022727</ref>
+[https://www.uniprot.org/uniprot/TOP2_YEAST TOP2_YEAST] Control of topological states of DNA by transient breakage and subsequent rejoining of DNA strands. Topoisomerase II makes double-strand breaks. Essential during mitosis and meiosis for proper segregation of daughter chromosomes.<ref>PMID:9685374</ref> <ref>PMID:23022727</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 37: / Line 36: @@
 __TOC__
 </StructureSection>
-[[Category: Atcc 18824]]
 [[Category: Large Structures]]
-[[Category: Berger, J M]]
+[[Category: Saccharomyces cerevisiae]]
-[[Category: Dong, K C]]
+[[Category: Berger JM]]
-[[Category: Atp-binding]]
+[[Category: Dong KC]]
-[[Category: Dna-binding]]
-[[Category: Isomerase]]
-[[Category: Isomerase-dna complex]]
-[[Category: Nucleotide-binding]]
-[[Category: Nucleus]]
-[[Category: Phosphoprotein]]
-[[Category: Protein-dna complex]]
-[[Category: Topoisomerase]]

2rgr

From Proteopedia

Current revision

Topoisomerase IIA bound to G-segment DNA

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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