Chem. J. Chinese Universities

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Steady-state and Time-resolved Spectroscopic Studies on the Interaction Between TMPyP4 and Nucleic Acids

WANG Xue-Fei1,2, ZHANG Hui-Juan3, WU Yi-Shi1,2, WANG Peng2, AI Xi-Cheng2*, ZHANG Jian-Ping1,2   

    1. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China;
    2. Department of Chemistry, College of Sciences, Renmin University of China, Beijing 100872, China;
    3. School of Life Science & Technology, Beijing Institute of Technology, Beijing 100081, China
  • Received:2006-10-09 Revised:1900-01-01 Online:2007-07-10 Published:2007-07-10
  • Contact: AI Xi-Cheng

Abstract: Steady-state absorption and fluorescence, circular dichroism and picosecond time-resolved fluorescence spectroscopies were used to investigate the interaction between 5,10,15,20-tetrakis(4-N-methylpyridine)porphyrin (TMPyP4) and nucleic acid molecules, i.e. bases (A, G, T, C), deoxynucleosides (dA, dG, dT, dC), deoxynucleotides (dAMP, dGMP, dTMP, dCMP) and oligonucleotides (dA6, dG6, dT6, dC6). The results show that the interactions between TMPyP4 and the purine species were stronger than that between TMPyP4 and the pyrimidine species. For a certain series of species, such as A, dA, dAMP and dA6, the interaction strength follows the order: base-nucleoside

Key words: Porphyrin, Porphyrin, Nucleic acid, Nucleic acid, Binding constant, Binding constant, Spectroscopy, Spectroscopy

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