Tanaka Y, Yamaguchi H, Oda S, Kondo Y, Nomura M, Chojiro K, Akira O. NMR spectroscopic study of a DNA duplex with mercury-mediated T-T base pairs.
NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2006;
25:613-24. [PMID:
16838849 DOI:
10.1080/15257770600686154]
[Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Recently, we reported that T-T mismatches can specifically recognize Hg(II) (T-Hg(II)-T pair formation). In order to understand the properties of the T-Hg(II)-T pair, we recorded NMR spectra for a DNA duplex, d(CGCGTTGTCC).d(GGACTTCGCG), with two successive T-T mismatches (Hg (II)-binding sites). We assigned 1H resonances for mercury-free and di-mercurated duplexes, and performed titration experiments with Hg(II) by using 1D 1H NMR spectra. Because of the above mentioned assignments, we could confirm the existence of mono-mercurated species, because individual components gave independent NMR signals in the titration spectra.
Collapse