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1sc7
From Proteopedia
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| - | [[Image:1sc7.png|left|200px]] | ||
| - | + | ==Human DNA Topoisomerase I (70 Kda) In Complex With The Indenoisoquinoline MJ-II-38 and Covalent Complex With A 22 Base Pair DNA Duplex== | |
| - | + | <StructureSection load='1sc7' size='340' side='right'caption='[[1sc7]], [[Resolution|resolution]] 3.00Å' scene=''> | |
| - | + | == Structural highlights == | |
| - | + | <table><tr><td colspan='2'>[[1sc7]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SC7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1SC7 FirstGlance]. <br> | |
| - | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3Å</td></tr> | |
| - | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=M38:4-(5,11-DIOXO-5H-INDENO[1,2-C]ISOQUINOLIN-6(11H)-YL)BUTANOATE'>M38</scene>, <scene name='pdbligand=PG4:TETRAETHYLENE+GLYCOL'>PG4</scene>, <scene name='pdbligand=PTR:O-PHOSPHOTYROSINE'>PTR</scene>, <scene name='pdbligand=TGP:5-THIO-2-DEOXY-GUANOSINE+PHOSPHONIC+ACID'>TGP</scene></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=1sc7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sc7 OCA], [https://pdbe.org/1sc7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1sc7 RCSB], [https://www.ebi.ac.uk/pdbsum/1sc7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1sc7 ProSAT]</span></td></tr> |
| - | [[1sc7]] is a 4 chain structure with sequence from [ | + | </table> |
| + | == Disease == | ||
| + | [https://www.uniprot.org/uniprot/TOP1_HUMAN TOP1_HUMAN] Note=A chromosomal aberration involving TOP1 is found in a form of therapy-related myelodysplastic syndrome. Translocation t(11;20)(p15;q11) with NUP98. | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/TOP1_HUMAN TOP1_HUMAN] Releases the supercoiling and torsional tension of DNA introduced during the DNA replication and transcription by transiently cleaving and rejoining one strand of the DNA duplex. Introduces a single-strand break via transesterification at a target site in duplex DNA. The scissile phosphodiester is attacked by the catalytic tyrosine of the enzyme, resulting in the formation of a DNA-(3'-phosphotyrosyl)-enzyme intermediate and the expulsion of a 5'-OH DNA strand. The free DNA strand then undergoes passage around the unbroken strand thus removing DNA supercoils. Finally, in the religation step, the DNA 5'-OH attacks the covalent intermediate to expel the active-site tyrosine and restore the DNA phosphodiester backbone (By similarity). Regulates the alternative splicing of tissue factor (F3) pre-mRNA in endothelial cells.<ref>PMID:2833744</ref> <ref>PMID:19168442</ref> <ref>PMID:14594810</ref> <ref>PMID:16033260</ref> | ||
| + | == 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/sc/1sc7_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/main_output.php?pdb_ID=1sc7 ConSurf]. | ||
| + | <div style="clear:both"></div> | ||
==See Also== | ==See Also== | ||
| - | *[[Topoisomerase|Topoisomerase]] | + | *[[Topoisomerase 3D structures|Topoisomerase 3D structures]] |
| - | + | == References == | |
| - | == | + | <references/> |
| - | < | + | __TOC__ |
| - | + | </StructureSection> | |
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
| - | [[Category: Burgin | + | [[Category: Large Structures]] |
| - | [[Category: Cushman | + | [[Category: Burgin AB]] |
| - | [[Category: Feese | + | [[Category: Cushman M]] |
| - | [[Category: Pommier | + | [[Category: Feese MD]] |
| - | [[Category: Staker | + | [[Category: Pommier Y]] |
| - | [[Category: Stewart | + | [[Category: Staker BL]] |
| - | [[Category: Zembower | + | [[Category: Stewart L]] |
| - | + | [[Category: Zembower D]] | |
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Current revision
Human DNA Topoisomerase I (70 Kda) In Complex With The Indenoisoquinoline MJ-II-38 and Covalent Complex With A 22 Base Pair DNA Duplex
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Categories: Homo sapiens | Large Structures | Burgin AB | Cushman M | Feese MD | Pommier Y | Staker BL | Stewart L | Zembower D
