Enhancement of aromatic amino acid‐nucleic acid base stacking interaction by metal coordination to base: fluorescence study on a tryptophan‐Pt(II)‐guanine ternary complex

FEBS Letters

关键词: Platinum complex;    Tryptophan;    Guanine;    Stacking interaction;    Fluorescence;    HOMO;    highest occupied molecular orbital;    LUMO;    lowest unoccupied molecular orbital;    Trp;    l-tryptophan;    GH;    9-ethyl-guanine;    dien;    diethylenetriamine;    dien-Pt;    [(dien)Pt(H2O)](ClO4)2;    dien-Pt · GH;    [(dien)Pt(GH)](ClO4)2;   

DOI  :  10.1016/0014-5793(95)00824-S

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

In order to investigate the effect of the Pt(II) ion on the stacking interaction between tryptophan and a guanine base, the quenching of Trp fluorescence was monitored for some systems in the absence and presence of the metal ion, and the association constants were obtained by the analysis of Eadie-Hofstee plots. All spectral data suggested that the stacking interaction is enhanced by the Pt(II) coordination to the guanine N7 atom. The result indicates the importance of the metal ion as a bookmark in the specific recognition of a nucleic acid base by an aromatic amino acid residue.

【 授权许可】

Unknown