165d

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[[Image:165d.jpg|left|200px]]
 
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==THE STRUCTURE OF A MISPAIRED RNA DOUBLE HELIX AT 1.6 ANGSTROMS RESOLUTION AND IMPLICATIONS FOR THE PREDICTION OF RNA SECONDARY STRUCTURE==
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The line below this paragraph, containing "STRUCTURE_165d", creates the "Structure Box" on the page.
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<StructureSection load='165d' size='340' side='right'caption='[[165d]], [[Resolution|resolution]] 1.55&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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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'>[[165d]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=165D OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=165D 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]] 1.55&#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=BRU:5-BROMO-2-DEOXYURIDINE-5-MONOPHOSPHATE'>BRU</scene>, <scene name='pdbligand=RHD:RHODIUM+HEXAMINE+ION'>RHD</scene></td></tr>
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{{STRUCTURE_165d| PDB=165d | 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=165d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=165d OCA], [https://pdbe.org/165d PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=165d RCSB], [https://www.ebi.ac.uk/pdbsum/165d PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=165d ProSAT]</span></td></tr>
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</table>
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'''THE STRUCTURE OF A MISPAIRED RNA DOUBLE HELIX AT 1.6 ANGSTROMS RESOLUTION AND IMPLICATIONS FOR THE PREDICTION OF RNA SECONDARY STRUCTURE'''
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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: Biala E]]
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The nonamer r(GCUUCGGC)dBrU, where dBrU is 5-bromo-2'-deoxyuridine, contains the tetraloop sequence UUCG. It crystallizes in the presence of Rh(NH3)6Cl3. In solution the oligomer is expected to form a hairpin loop but the x-ray structure analysis, to a resolution of 1.6 A, indicates an eight-base-pair A-RNA duplex containing a central block of two G.U and two C.U pairs. Self-pairs which approximate to Watson-Crick geometry are also formed in the extended crystal structure between symmetry-related BrU residues and are part of infinite double-helical stacks. The G.U pair is a wobble base pair analogous to the G.T pair found in DNA fragments. The C.U mismatch involves one hydrogen-bonded contact between the bases and a bridging water molecule which ensures a good fit of the base pair in the RNA helix. The BrU.BrU pair is held by two hydrogen bonds in an orientation which is compatible with duplex geometry. The structure observed within the crystal has some parallels with the structure of globular RNAs, and the presence of stable, noncanonical base pairs has implications for the prediction of RNA secondary structure.
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[[Category: Cruse W]]
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[[Category: Kennard O]]
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==About this Structure==
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[[Category: Prange T]]
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Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=165D OCA].
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[[Category: Saludjian P]]
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[[Category: Strazewski P]]
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==Reference==
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Structure of a mispaired RNA double helix at 1.6-A resolution and implications for the prediction of RNA secondary structure., Cruse WB, Saludjian P, Biala E, Strazewski P, Prange T, Kennard O, Proc Natl Acad Sci U S A. 1994 May 10;91(10):4160-4. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/7514296 7514296]
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[[Category: Biala, E.]]
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[[Category: Cruse, W.]]
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[[Category: Kennard, O.]]
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[[Category: Prange, T.]]
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[[Category: Saludjian, P.]]
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[[Category: Strazewski, P.]]
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[[Category: A-dna/rna]]
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[[Category: Double helix]]
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[[Category: Mismatched]]
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[[Category: Modified]]
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[[Category: Overhanging base]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 09:32:07 2008''
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Current revision

THE STRUCTURE OF A MISPAIRED RNA DOUBLE HELIX AT 1.6 ANGSTROMS RESOLUTION AND IMPLICATIONS FOR THE PREDICTION OF RNA SECONDARY STRUCTURE

PDB ID 165d

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