1cy8: Difference between revisions

<StructureSection load='1cy8' size='340' side='right'caption='[[1cy8]], [[Resolution|resolution]] 2.45&Aring;' scene=''>

<table><tr><td colspan='2'>[[1cy8]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CY8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1CY8 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]] 2.45&#8491;</td></tr>

<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=T3P:THYMIDINE-3-PHOSPHATE'>T3P</scene>, <scene name='pdbligand=TMP:THYMIDINE-5-PHOSPHATE'>TMP</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=1cy8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1cy8 OCA], [https://pdbe.org/1cy8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1cy8 RCSB], [https://www.ebi.ac.uk/pdbsum/1cy8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1cy8 ProSAT]</span></td></tr>

[https://www.uniprot.org/uniprot/TOP1_ECOLI TOP1_ECOLI] Releases the supercoiling and torsional tension of DNA, which is 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-(5'-phosphotyrosyl)-enzyme intermediate and the expulsion of a 3'-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 3'-OH attacks the covalent intermediate to expel the active-site tyrosine and restore the DNA phosphodiester backbone.<ref>PMID:9497321</ref> <ref>PMID:10681504</ref> <ref>PMID:21482796</ref>  

[[Category: Escherichia coli K-12]]

[[Category: Large Structures]]

[[Category: Changela A]]

[[Category: Feinberg H]]

[[Category: Mondragon A]]