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| | <StructureSection load='3rad' size='340' side='right'caption='[[3rad]], [[Resolution|resolution]] 3.35Å' scene=''> | | <StructureSection load='3rad' size='340' side='right'caption='[[3rad]], [[Resolution|resolution]] 3.35Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3rad]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/"diplococcus_pneumoniae"_(klein_1884)_weichselbaum_1886 "diplococcus pneumoniae" (klein 1884) weichselbaum 1886]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3RAD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3RAD FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3rad]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus_pneumoniae Streptococcus pneumoniae] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3RAD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3RAD 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>, <scene name='pdbligand=NFX:7-[(3R)-3-AMINOPYRROLIDIN-1-YL]-8-CHLORO-1-CYCLOPROPYL-6-FLUORO-4-OXO-1,4-DIHYDROQUINOLINE-3-CARBOXYLIC+ACID'>NFX</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]] 3.35Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2nov|2nov]], [[3foe|3foe]], [[3fof|3fof]], [[3k9f|3k9f]], [[3ksa|3ksa]], [[3ksb|3ksb]], [[3ltn|3ltn]], [[3rae|3rae]], [[3raf|3raf]]</div></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>, <scene name='pdbligand=NFX:7-[(3R)-3-AMINOPYRROLIDIN-1-YL]-8-CHLORO-1-CYCLOPROPYL-6-FLUORO-4-OXO-1,4-DIHYDROQUINOLINE-3-CARBOXYLIC+ACID'>NFX</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">parC, SP_0855 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1313 "Diplococcus pneumoniae" (Klein 1884) Weichselbaum 1886]), parE, SP_0852 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1313 "Diplococcus pneumoniae" (Klein 1884) Weichselbaum 1886])</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=3rad FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rad OCA], [https://pdbe.org/3rad PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3rad RCSB], [https://www.ebi.ac.uk/pdbsum/3rad PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3rad ProSAT]</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=3rad FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rad OCA], [https://pdbe.org/3rad PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3rad RCSB], [https://www.ebi.ac.uk/pdbsum/3rad PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3rad ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/PARC_STRPN PARC_STRPN]] Topoisomerase IV is essential for chromosome segregation. It relaxes supercoiled DNA. Performs the decatenation events required during the replication of a circular DNA molecule.<ref>PMID:17375187</ref> <ref>PMID:20596531</ref> [[https://www.uniprot.org/uniprot/PARE_STRPN PARE_STRPN]] Topoisomerase IV is essential for chromosome segregation. It relaxes supercoiled DNA. Performs the decatenation events required during the replication of a circular DNA molecule.<ref>PMID:17375187</ref> <ref>PMID:20596531</ref>
| + | [https://www.uniprot.org/uniprot/PARC_STRPN PARC_STRPN] Topoisomerase IV is essential for chromosome segregation. It relaxes supercoiled DNA. Performs the decatenation events required during the replication of a circular DNA molecule.<ref>PMID:17375187</ref> <ref>PMID:20596531</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Fisher, L M]] | + | [[Category: Streptococcus pneumoniae]] |
| - | [[Category: Laponogov, I]] | + | [[Category: Synthetic construct]] |
| - | [[Category: McAuley, K E]] | + | [[Category: Fisher LM]] |
| - | [[Category: Pan, X S]] | + | [[Category: Laponogov I]] |
| - | [[Category: Sanderson, M R]] | + | [[Category: McAuley KE]] |
| - | [[Category: Veselkov, D A]] | + | [[Category: Pan X-S]] |
| - | [[Category: Clinafloxacin]]
| + | [[Category: Sanderson MR]] |
| - | [[Category: Isomerase-dna-antibiotic complex]]
| + | [[Category: Veselkov DA]] |
| - | [[Category: Protein-dna cleavage complex]] | + | |
| - | [[Category: Topoisomerase iia]] | + | |
| Structural highlights
Function
PARC_STRPN Topoisomerase IV is essential for chromosome segregation. It relaxes supercoiled DNA. Performs the decatenation events required during the replication of a circular DNA molecule.[1] [2]
Publication Abstract from PubMed
As part of a programme of synthesizing and investigating the biological properties of new fluoroquinolone antibacterials and their targeting of topoisomerase IV from Streptococcus pneumoniae, we have solved the X-ray structure of the complexes of two new 7,8-bridged fluoroquinolones (with restricted C7 group rotation favouring tight binding) in complex with the topoisomerase IV from S. pneumoniae and an 18-base-pair DNA binding site-the E-site-found by our DNA mapping studies to bind drug strongly in the presence of topoisomerase IV (Leo et al. 2005 J. Biol. Chem. 280, 14 252-14 263, doi:10.1074/jbc.M500156200). Although the degree of antibiotic resistance towards fluoroquinolones is much lower than that of beta-lactams and a range of ribosome-bound antibiotics, there is a pressing need to increase the diversity of members of this successful clinically used class of drugs. The quinolone moiety of the new 7,8-bridged agents ACHN-245 and ACHN-454 binds similarly to that of clinafloxocin, levofloxacin, moxifloxacin and trovofloxacin but the cyclic scaffold offers the possibility of chemical modification to produce interactions with other topoisomerase residues at the active site.
Exploring the active site of the Streptococcus pneumoniae topoisomerase IV-DNA cleavage complex with novel 7,8-bridged fluoroquinolones.,Laponogov I, Pan XS, Veselkov DA, Cirz RT, Wagman A, Moser HE, Fisher LM, Sanderson MR Open Biol. 2016 Sep;6(9). pii: rsob.160157. doi: 10.1098/rsob.160157. PMID:27655731[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Laponogov I, Veselkov DA, Sohi MK, Pan XS, Achari A, Yang C, Ferrara JD, Fisher LM, Sanderson MR. Breakage-reunion domain of Streptococcus pneumoniae topoisomerase IV: crystal structure of a gram-positive quinolone target. PLoS ONE. 2007 Mar 21;2(3):e301. PMID:17375187 doi:10.1371/journal.pone.0000301
- ↑ Laponogov I, Pan XS, Veselkov DA, McAuley KE, Fisher LM, Sanderson MR. Structural basis of gate-DNA breakage and resealing by type II topoisomerases. PLoS One. 2010 Jun 28;5(6):e11338. PMID:20596531 doi:10.1371/journal.pone.0011338
- ↑ Laponogov I, Pan XS, Veselkov DA, Cirz RT, Wagman A, Moser HE, Fisher LM, Sanderson MR. Exploring the active site of the Streptococcus pneumoniae topoisomerase IV-DNA cleavage complex with novel 7,8-bridged fluoroquinolones. Open Biol. 2016 Sep;6(9). pii: rsob.160157. doi: 10.1098/rsob.160157. PMID:27655731 doi:http://dx.doi.org/10.1098/rsob.160157
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