2m54
From Proteopedia
(Difference between revisions)
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| - | + | ==Refined NMR solution structure of metal-modified DNA== | |
| - | + | <StructureSection load='2m54' size='340' side='right' caption='[[2m54]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> | |
| - | + | == Structural highlights == | |
| + | <table><tr><td colspan='2'>[[2m54]] is a 2 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2M54 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2M54 FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=AG:SILVER+ION'>AG</scene></td></tr> | ||
| + | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=D33:1-(2-DEOXY-5-O-PHOSPHONO-BETA-D-ERYTHRO-PENTOFURANOSYL)-1H-IMIDAZOLE'>D33</scene></td></tr> | ||
| + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2ke8|2ke8]], [[2k68|2k68]]</td></tr> | ||
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2m54 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2m54 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2m54 RCSB], [http://www.ebi.ac.uk/pdbsum/2m54 PDBsum]</span></td></tr> | ||
| + | </table> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | A series of hybrid quantum mechanical/molecular mechanical (QM/MM) calculations was performed on models of a DNA duplex with artificial silver(I)-mediated imidazole base pairs. The optimized structures were compared to the original experimental NMR structure (Nat. Chem. 2 (2010) 229-234). The metalcdots, three dots, centeredmetal distances are significantly shorter (~0.5A) in the QM/MM model than in the original NMR structure. As a result, argentophilic interactions are feasible between the silver(I) ions of neighboring metal-mediated base pairs. Using the computationally determined metalcdots, three dots, centeredmetal distances, a re-refined NMR solution structure of the DNA duplex was obtained. In this new NMR structure, all experimental constraints remain fulfilled. The new NMR structure shows less deviation from the regular B-type conformation than the original one. This investigation shows that the application of QM/MM models to generate additional constraints to be used during NMR structural refinements represents an elegant approach to obtaining high-resolution NMR structures. | ||
| - | + | A QM/MM refinement of an experimental DNA structure with metal-mediated base pairs.,Kumbhar S, Johannsen S, Sigel RK, Waller MP, Muller J J Inorg Biochem. 2013 Mar 28. pii: S0162-0134(13)00067-6. doi:, 10.1016/j.jinorgbio.2013.03.009. PMID:23622950<ref>PMID:23622950</ref> | |
| - | + | ||
| - | == | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> |
| - | + | </div> | |
| - | [[Category: Johannsen, S | + | == References == |
| - | [[Category: Kumbhar, S | + | <references/> |
| - | [[Category: Mueller, J | + | __TOC__ |
| - | [[Category: Sigel, R K | + | </StructureSection> |
| - | [[Category: Waller, M P | + | [[Category: Johannsen, S]] |
| + | [[Category: Kumbhar, S]] | ||
| + | [[Category: Mueller, J]] | ||
| + | [[Category: Sigel, R K]] | ||
| + | [[Category: Waller, M P]] | ||
[[Category: Artificial nucleobase]] | [[Category: Artificial nucleobase]] | ||
[[Category: Dna]] | [[Category: Dna]] | ||
[[Category: Imidazole nucleoside]] | [[Category: Imidazole nucleoside]] | ||
Revision as of 12:43, 18 December 2014
Refined NMR solution structure of metal-modified DNA
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