Modulation of group I ribozyme activity by cationic porphyrins

Shigeyoshi Matsumura, Tatsunobu Ito, Takahiro Tanaka, Hiroyuki Furuta, Yoshiya Ikawa

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)


    The effects of cationic porphyrins on the catalytic activities of four group I ribozymes were investigated. A cationic porphyrin possessing four pyridinium moieties (pPyP) inhibited two group IC3 ribozymes (Syn Rz and Azo Rz) and a group IC1 ribozyme (Tet Rz). In the case of a group IA2 ribozyme (Td Rz), however, pPyP served not only as an inhibitor but also as an activator, and the effects of pPyP were dependent on its concentration. To analyze the structural and electronic factors determining the effects of pPyP on group I ribozymes, three cationic porphyrins (pPyNCP, pPyF4P, and TMPyP) were also examined. As interactions between small organic molecules and nucleic acids are attractive and important issues in biochemistry and biotechnology, this study contributes to the development of porphyrin-based molecules that can modulate functions of structured RNA molecules.

    Original languageEnglish
    Pages (from-to)251-263
    Number of pages13
    Issue number2
    Publication statusPublished - Mar 24 2015

    All Science Journal Classification (ASJC) codes

    • General Biochemistry,Genetics and Molecular Biology
    • General Immunology and Microbiology
    • General Agricultural and Biological Sciences


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