1fyp: Difference between revisions
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[[ | ==EUKARYOTIC DECODING REGION A-SITE RNA-PAROMOMYCIN COMPLEX== | ||
<StructureSection load='1fyp' size='340' side='right' caption='[[1fyp]], [[NMR_Ensembles_of_Models | 29 NMR models]]' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1fyp]] is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FYP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1FYP FirstGlance]. <br> | |||
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=PAR:PAROMOMYCIN'>PAR</scene><br> | |||
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1fyo|1fyo]], [[1pbr|1pbr]], [[1a3m|1a3m]]</td></tr> | |||
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1fyp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fyp OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1fyp RCSB], [http://www.ebi.ac.uk/pdbsum/1fyp PDBsum]</span></td></tr> | |||
<table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Aminoglycoside antibiotics, including paromomycin, neomycin and gentamicin, target a region of highly conserved nucleotides in the decoding region aminoacyl-tRNA site (A site) of 16 S rRNA on the 30 S subunit. Change of a single nucleotide, A1408 to G, reduces the affinity of many aminoglycosides for the ribosome; G1408 distinguishes between prokaryotic and eukaryotic ribosomes. The structures of a prokaryotic decoding region A-site oligonucleotide free in solution and bound to the aminoglycosides paromomycin and gentamicin C1a were determined previously. Here, the structure of a eukaryotic decoding region A-site oligonucleotide bound to paromomycin has been determined using NMR spectroscopy and compared to the prokaryotic A-site-paromomycin structure. A conformational change in three adenosine residues of an internal loop, critical for high-affinity antibiotic binding, was observed in the prokaryotic RNA-paromomycin complex in comparison to its free form. This conformational change is not observed in the eukaryotic RNA-paromomycin complex, disrupting the binding pocket for ring I of the antibiotic. The lack of the conformational change supports footprinting and titration calorimetry data that demonstrate approximately 25-50-fold weaker binding of paromomycin to the eukaryotic decoding-site oligonucleotide. Neomycin, which is much less active against Escherichia coli ribosomes with an A1408G mutation, binds non-specifically to the oligonucleotide. These results suggest that eukaryotic ribosomal RNA has a shallow binding pocket for aminoglycosides, which accommodates only certain antibiotics. | |||
Structural origins of aminoglycoside specificity for prokaryotic ribosomes.,Lynch SR, Puglisi JD J Mol Biol. 2001 Mar 9;306(5):1037-58. PMID:11237617<ref>PMID:11237617</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
== References == | |||
<references/> | |||
== | __TOC__ | ||
</StructureSection> | |||
[[Category: Lynch, S R.]] | [[Category: Lynch, S R.]] | ||
[[Category: Puglisi, J D.]] | [[Category: Puglisi, J D.]] | ||
Revision as of 14:29, 28 September 2014
EUKARYOTIC DECODING REGION A-SITE RNA-PAROMOMYCIN COMPLEX
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