315d

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(New page: 200px<br /><applet load="315d" size="350" color="white" frame="true" align="right" spinBox="true" caption="315d, resolution 1.380&Aring;" /> '''CRYSTAL STRUCTURE O...)
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[[Image:315d.jpg|left|200px]]<br /><applet load="315d" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="315d, resolution 1.380&Aring;" />
 
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'''CRYSTAL STRUCTURE OF AN ALTERNATING OCTAMER R(GUAUGUA)D(C) WITH ADJACENT G-U WOBBLE PAIRS'''<br />
 
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==Overview==
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==CRYSTAL STRUCTURE OF AN ALTERNATING OCTAMER R(GUAUGUA)D(C) WITH ADJACENT G-U WOBBLE PAIRS==
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The crystal structure of the RNA duplex, r(GUAUGUA)dC, with a 3'-terminal, deoxy C residue, has been determined at 1.38 A resolution. The r(GUAUGU), hexameric consensus sequence is present at the exon-intron junction in, pre-mRNAs of yeast and higher eukaryotic organisms. The crystal belongs to, the rhombohedral space group R3. The hexagonal unit cell dimensions are a, = b = 39.71 A, c = 68.15 A and gamma = 120 degrees with one duplex in the, asymmetric unit. The structure was solved using the molecular replacement, method. The final model contains 332 atoms of the duplex and 67 solvent, molecules. The R-factor is 17.6% (Rfree of 23.1%) for 4035 reflections, with F &gt; or = 1.5sigma(F) in the resolution range 10.0 to 1.38 A. The, duplex is of the A-type with a pseudodyad relating the two strands. The, RNA helix is slightly distorted, in spite of the presence of two adjacent, G x U wobble base-pairs located at the center of the helix. The twist, angle between the wobble pairs, 38.1 degrees, is above the average value, and those between the wobble base-pairs and the flanking Watson-Crick, base-pairs, 26.7 degrees and 26.3 degrees, respectively, are lower than, the average values. The twist between the junction base-pairs are about 24, degrees. The G x U wobble pairs are bridged by water molecules and, solvated in the grooves. G x U base-pairs are as stable as the, Watson-Crick A x U pairs and only slightly less stable than the G x C, pairs accounting for their frequent occurrence in RNA.
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<StructureSection load='315d' size='340' side='right'caption='[[315d]], [[Resolution|resolution]] 1.38&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[315d]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=315D OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=315D FirstGlance]. <br>
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315D is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/ ]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=315D OCA].
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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]] 1.38&#8491;</td></tr>
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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=315d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=315d OCA], [https://pdbe.org/315d PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=315d RCSB], [https://www.ebi.ac.uk/pdbsum/315d PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=315d ProSAT]</span></td></tr>
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==Reference==
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</table>
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Crystal structure of an alternating octamer r(GUAUGUA)dC with adjacent G x U wobble pairs., Biswas R, Wahl MC, Ban C, Sundaralingam M, J Mol Biol. 1997 Apr 18;267(5):1149-56. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=9150403 9150403]
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__TOC__
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[[Category: Protein complex]]
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</StructureSection>
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[[Category: Ban, C.]]
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[[Category: Large Structures]]
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[[Category: Biswas, R.]]
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[[Category: Ban C]]
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[[Category: Sundaralingam, M.]]
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[[Category: Biswas R]]
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[[Category: Wahl, M.C.]]
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[[Category: Sundaralingam M]]
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[[Category: a-dna/rna]]
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[[Category: Wahl MC]]
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[[Category: double helix]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jan 29 21:34:57 2008''
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Current revision

CRYSTAL STRUCTURE OF AN ALTERNATING OCTAMER R(GUAUGUA)D(C) WITH ADJACENT G-U WOBBLE PAIRS

PDB ID 315d

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