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| [[Image:1da1.gif|left|200px]]<br /><applet load="1da1" size="350" color="white" frame="true" align="right" spinBox="true"
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| caption="1da1, resolution 2.250Å" />
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| '''STRUCTURAL CHARACTERISATION OF THE BROMOURACIL-GUANINE BASE PAIR MISMATCH IN A Z-DNA FRAGMENT'''<br />
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| ==Overview== | | ==STRUCTURAL CHARACTERISATION OF THE BROMOURACIL-GUANINE BASE PAIR MISMATCH IN A Z-DNA FRAGMENT== |
| The deoxyoligonucleotide d(BrU-G-C-G-C-G) was crystallised at pH 8.2 and its structure analysed by X-ray diffraction. The unit cell, of dimensions a = 17.94, b = 30.85, c = 49.94A contains four DNA duplexes in space group P2(1)2(1)2(1). The duplexes are in the Z conformation, with four Watson-Crick G.C base pairs and two BrU.G base pairs. The structure was refined to an R factor of 0.16 at a resolution of 2.2A with 64 solvent molecules located. The BrU.G base pair mismatch is of the wobble type, with both bases in the major tautomer form and hydrogen bonds linking 0-2 of BrU with N-1 of G and N3 of BrU with 0-6 of G. There is no indication of the presence of ionised base pairs, in spite of the high pH of crystallisation. The results are discussed in terms of the mutagenic properties of 5- bromouracil.
| | <StructureSection load='1da1' size='340' side='right'caption='[[1da1]], [[Resolution|resolution]] 2.25Å' scene=''> |
| | == Structural highlights == |
| | <table><tr><td colspan='2'>[[1da1]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DA1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DA1 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]] 2.25Å</td></tr> |
| | <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=MG:MAGNESIUM+ION'>MG</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=1da1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1da1 OCA], [https://pdbe.org/1da1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1da1 RCSB], [https://www.ebi.ac.uk/pdbsum/1da1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1da1 ProSAT]</span></td></tr> |
| | </table> |
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| ==About this Structure== | | ==See Also== |
| 1DA1 is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/ ] with <scene name='pdbligand=MG:'>MG</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DA1 OCA].
| | *[[Z-DNA|Z-DNA]] |
| | | __TOC__ |
| ==Reference==
| | </StructureSection> |
| Structural characterisation of the bromouracil.guanine base pair mismatch in a Z-DNA fragment., Brown T, Kneale G, Hunter WN, Kennard O, Nucleic Acids Res. 1986 Feb 25;14(4):1801-9. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=3951996 3951996]
| | [[Category: Large Structures]] |
| [[Category: Protein complex]] | | [[Category: Brown T]] |
| [[Category: Brown, T.]] | | [[Category: Hunter WN]] |
| [[Category: Hunter, W N.]] | | [[Category: Kennard O]] |
| [[Category: Kennard, O.]] | | [[Category: Kneale G]] |
| [[Category: Kneale, G.]] | |
| [[Category: MG]]
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| [[Category: double helix]]
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| [[Category: mismatched]]
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| [[Category: modified]]
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| [[Category: z-dna]]
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| ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:14:31 2008''
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