1nta

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[[Image:1nta.gif|left|200px]]
 
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==2.9 A crystal structure of Streptomycin RNA-aptamer==
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The line below this paragraph, containing "STRUCTURE_1nta", creates the "Structure Box" on the page.
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<StructureSection load='1nta' size='340' side='right'caption='[[1nta]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1nta]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NTA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1NTA FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.9&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BA:BARIUM+ION'>BA</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=SRY:STREPTOMYCIN'>SRY</scene></td></tr>
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{{STRUCTURE_1nta| PDB=1nta | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1nta FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1nta OCA], [https://pdbe.org/1nta PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1nta RCSB], [https://www.ebi.ac.uk/pdbsum/1nta PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1nta ProSAT]</span></td></tr>
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</table>
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'''2.9 A crystal structure of Streptomycin RNA-aptamer'''
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
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==Overview==
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[[Category: Patel DJ]]
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We describe a 2.9 A X-ray structure of a complex between the aminocyclitol antibiotic streptomycin and an in vitro selected RNA aptamer, solved using the anomalous diffraction properties of Ba cations. The RNA aptamer, which contains two asymmetric internal loops, adopts a distinct cation-stabilized fold involving a series of S-shaped backbone turns anchored by canonical and noncanonical pairs and triples. The streptomycin streptose ring is encapsulated by stacked arrays of bases from both loops at the elbow of the L-shaped RNA architecture. Specificity is defined by direct hydrogen bonds between all streptose functional groups and base edges that line the inner walls of the cylindrical binding pocket. By contrast, the majority of intermolecular interactions involve contacts to backbone phosphates in the published structure of streptomycin bound to the 16S rRNA.
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[[Category: Skripkin E]]
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[[Category: Tereshko V]]
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==About this Structure==
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Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NTA OCA].
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==Reference==
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Encapsulating streptomycin within a small 40-mer RNA., Tereshko V, Skripkin E, Patel DJ, Chem Biol. 2003 Feb;10(2):175-87. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12618190 12618190]
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[[Category: Patel, D J.]]
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[[Category: Skripkin, E.]]
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[[Category: Tereshko, V.]]
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[[Category: Barium form]]
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[[Category: Streptomycin rna-aptamer]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 02:57:12 2008''
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2.9 A crystal structure of Streptomycin RNA-aptamer

PDB ID 1nta

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