4u20: Difference between revisions
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New page: '''Unreleased structure''' The entry 4u20 is ON HOLD Authors: Noeske, J., Huang, J., Olivier, N.B., Giacobbe, R.A., Zambrowski, M., Cate, J.H.D. Description: Crystal structure of the E... |
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==Crystal structure of the E. coli ribosome bound to flopristin.== | |||
<StructureSection load='4u20' size='340' side='right'caption='[[4u20]], [[Resolution|resolution]] 2.90Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[4u20]] is a 20 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12] and [https://en.wikipedia.org/wiki/Escherichia_coli_str._K-12_substr._MDS42 Escherichia coli str. K-12 substr. MDS42]. This structure supersedes the now removed PDB entries [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=4tou 4tou], [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=4tov 4tov], [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=4tow 4tow] and [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=4tox 4tox]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4U20 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4U20 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]] 2.9Å</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=VIF:FLOPRISTIN'>VIF</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=4u20 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4u20 OCA], [https://pdbe.org/4u20 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4u20 RCSB], [https://www.ebi.ac.uk/pdbsum/4u20 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4u20 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/RS2_ECOLI RS2_ECOLI] | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Streptogramin antibiotics are divided into type A and B streptogramins, which in combination can act synergistically. We compared the molecular interactions of the streptogramin combinations Synercid (type A: dalfopristin, type B: quinupristin) and NXL 103 (type A: flopristin, type B: linopristin) with the Escherichia coli 70S ribosome by x-ray crystallography. We further analyzed the activity of the streptogramin components individually and in combination. Streptogramin A and B components in Synercid and NXL 103 exhibit synergistic antimicrobial activity against certain pathogenic bacteria. However, in transcription-coupled translation assays, only combinations that include dalfopristin, the streptogramin A component of Synercid, show synergy. Notably, the diethylaminoethylsulfonyl group in dalfopristin reduces its activity, but is the basis for synergy in transcription-coupled translation assays before its rapid hydrolysis from the depsipeptide core. Replacement of the diethylaminoethylsulfonyl group in dalfopristin by a non-hydrolyzable group may therefore be beneficial for synergy. The absence of general streptogramin synergy in transcription-coupled translation assays suggests that synergistic antimicrobial activity of streptogramins can occur independently of streptogramin effects on translation. | |||
Synergy of streptogramin antibiotics occurs independently of their effects on translation.,Noeske J, Huang J, Olivier NB, Giacobbe RA, Zambrowski M, Cate JH Antimicrob Agents Chemother. 2014 Jun 23. pii: AAC.03389-14. PMID:24957822<ref>PMID:24957822</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 4u20" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Ribosome 3D structures|Ribosome 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Escherichia coli K-12]] | |||
[[Category: Escherichia coli str. K-12 substr. MDS42]] | |||
[[Category: Large Structures]] | |||
[[Category: Cate JHD]] | |||
[[Category: Giacobbe RA]] | |||
[[Category: Huang J]] | |||
[[Category: Noeske J]] | |||
[[Category: Olivier NB]] | |||
[[Category: Zambrowski M]] | |||
