2rt8

Structure of metallo-dna in solution

spinqualitylabelsall models 2rt8, 17 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2rt8 is a 2 chain structure. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: HG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed We have determined the three-dimensional (3D) structure of DNA duplex that includes tandem Hg(II)-mediated T-T base pairs (thymine-Hg(II)-thymine, T-Hg(II)-T) with NMR spectroscopy in solution. This is the first 3D structure of metallo-DNA (covalently metallated DNA) composed exclusively of 'NATURAL' bases. The T-Hg(II)-T base pairs whose chemical structure was determined with the (15)N NMR spectroscopy were well accommodated in a B-form double helix, mimicking normal Watson-Crick base pairs. The Hg atoms aligned along DNA helical axis were shielded from the bulk water. The complete dehydration of Hg atoms inside DNA explained the positive reaction entropy (DeltaS) for the T-Hg(II)-T base pair formation. The positive DeltaS value arises owing to the Hg(II) dehydration, which was approved with the 3D structure. The 3D structure explained extraordinary affinity of thymine towards Hg(II) and revealed arrangement of T-Hg(II)-T base pairs in metallo-DNA. The structure of metallo-DNA with consecutive thymine-HgII-thymine base pairs explains positive entropy for the metallo base pair formation.,Yamaguchi H, Sebera J, Kondo J, Oda S, Komuro T, Kawamura T, Dairaku T, Kondo Y, Okamoto I, Ono A, Burda JV, Kojima C, Sychrovsky V, Tanaka Y Nucleic Acids Res. 2014 Apr;42(6):4094-9. doi: 10.1093/nar/gkt1344. Epub 2013 Dec, 26. PMID:24371287 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

Proteopedia Page Contributors and Editors (what is this?)

OCA