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Structural analysis of telomere G-quartet and molecular design of new nucleic acid aptamer

Research Project

Project/Area Number 15570098
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural biochemistry
Research InstitutionKyoto Institute of Technology

Principal Investigator

KANAORI Kenji  Kyoto Institute of Technology, Faculty of Textile, Associate Professor, 繊維学部, 助教授 (30273543)

Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2004: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2003: ¥2,700,000 (Direct Cost: ¥2,700,000)
Keywordstelomere / four stranded structure / nucleic acid aptamer / i-moitf / G-quartet / NMR
Research Abstract

The P-chiral stereodefined phosphorothioate groups have been introduced into all the four internucleotide positions of d(T_<PS1>C_<PS2>C_<PS3>C_<PS4>C) (PSn : phosphorothioate group), and among possible 16 diastereomers of PS-d(TC_4), 10 stereomers have been synthesized to investigate the effects of the sense of the P-chirality upon the structure and stability of the i-motif structure. The temperature dependence of circular dichroism spectra showed melting temperature (Tm) of the [all R_p]PS-d(TC_4) i-motif was 31 ℃ identical to that of the parent oligomer, PO-d(TC_4), while that of the [all S_p]PS-d(TC_4) i-motif was largely decreased by 11℃. Single substitution of R_p with S_p caused a decrease of T_m by 3〜4℃ at positions of PS1, 2, and 3, and by 1℃ at that of PS4, showing the additive property of the T_m suppression. The comparison of the NOESY spectra between [all R_p]PS-, [all S_p]PS-, and PO-d(TC_4) showed that intra-residual H6-H3' and H2"-H4' NOE cross-peaks of the [all S_p] isomer are weaker than those of the [all R_p] isomer and PO-d(TC_4), indicating the change in the C3'-endo conformation and glycosidic bond angle. The structural alternation for the i-motif formed by [all S_p]PS-d(TC_4) is also suggested by the chemical shift differences of C2/C3/C4 H2"and H4' protons from those of [all R_p]PS-d(TC_4) and PO-d(TC_4). These results suggest that the S_p configuration at phosphorus of the phosphorothioate linkage change the sugar-phosphorothioate conformation and intermolecular interaction in the narrow groove, leading to the destabilization of the i-motif structure.

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (16 results)

All 2005 2004 2003 Other

All Journal Article (14 results) Publications (2 results)

  • [Journal Article] Solution structure of marinostatin, a natural ester-linked protein protease inhibitor2005

    • Author(s)
      Kanaori, K.
    • Journal Title

      Biochemistry 44

      Pages: 2462-2468

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] Effect of phosphorothioate chirality on i-motif structure and stability2004

    • Author(s)
      Kanaori, K.
    • Journal Title

      Biochemistry 43

      Pages: 5672-5679

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] 1H NMR study on equilibrium between parallel G-quartet structures2004

    • Author(s)
      Kanaori, K.
    • Journal Title

      Nucleic Acids Symp.Series 48

      Pages: 233-234

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] Two-metal ion, Ni(II) and Cu(II), Binding α-helical coiled coil peptide2004

    • Author(s)
      Tanaka, T.
    • Journal Title

      J.Am.Chem.Soc. 126

      Pages: 14023-14028

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Semihemoglobins, high oxygen affinity dimeric forms of human hemoglobin respond efficiently to allosteric effectors without forming tetramers2004

    • Author(s)
      Tsuneshige, A.
    • Journal Title

      J.Biol.Chem. 279

      Pages: 48959-48967

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] Effect of phosphorothioate chirality on i-motif structure and stability.2004

    • Author(s)
      K.Kanaori, S.Sakamoto, H.Yoshida, P.Guga, W.Stec, K.Tajima, K.Makino
    • Journal Title

      Biochemistry 43

      Pages: 5672-5679

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] ^1H NMR study on equilibrium between parallel G-quartet structures.2004

    • Author(s)
      K.Kanaori, A.Yasumra, K.Tajima, K.Makino
    • Journal Title

      Nucleic Acids Symp.Series 48

      Pages: 233-234

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Solution structure of marinostatin, a natural ester-linked protein protease inhibitor.2004

    • Author(s)
      K.Kanaori, K.Kamei, M.Taniguchi, T.Koyama, T.Yasui, R.Takano, C.Imada, K.Tajima, S.Hara
    • Journal Title

      Biochemistry 44

      Pages: 2462-2468

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Two-metal ion, Ni(II) and Cu(II), Binding a-helical coiled coil peptide.2004

    • Author(s)
      T.Tanaka, T.Mizuno, S.Fukui, H.Hiroaki, J.Oku, K.Kanaori, K.Tajima, M.Shirakawa
    • Journal Title

      J.Am.Chem.Soc. 126

      Pages: 14023-14028

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Semihemoglobins, high oxygen affinity dimeric forms of human hemoglobin respond efficiently to allosteric effectors without forming tetramers2004

    • Author(s)
      A.Tsuneshige, K.Kanaori, U.Samuni, D.Danstker, J.M.Friedman, S.Neya, L.L.Giangiacomo, T.Yonetani
    • Journal Title

      J.Biol.Chem. 279

      Pages: 48959-48967

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Two-metal ion, Ni(II) and Cu(II), Binding α-helical coiled coil peptide2004

    • Author(s)
      Tanaka, T.
    • Journal Title

      J.Am.Chem.Soc 126

      Pages: 14023-14028

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Nitration of 2'-deoxyguanosine by a NO/O2 gas mixture : identification and characterization of N2-nitro-2'-deoxyguanosine2003

    • Author(s)
      Yamada, M.
    • Journal Title

      Org.Lett. 5

      Pages: 3173-3176

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Nitration of 2'-deoxyguanosine by a NO/O2 gas mixture : identification and characterization of N2-nitro-2'-deoxyguanosine.2003

    • Author(s)
      M.Yamada, T.Suzuki, K.Kanaori, K..Tajima, S.Sakamoto, T.Kodaki, K.Makino
    • Journal Title

      Org.Lett. 5

      Pages: 3173-3176

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Relationship between temporary inhibition and structure of disulfide-linkage analogs of marinostatin, a natural ester-linked protease inhibitor

    • Author(s)
      Taniguchi, M.
    • Journal Title

      J.Peptide Res. (In press)

    • Related Report
      2004 Annual Research Report
  • [Publications] Kanaori, K: "Effect of phosphorothioate chirality on i-motif structure and stability"Biochemistry. (In press).

    • Related Report
      2003 Annual Research Report
  • [Publications] Yamada, M.: "Nitration of 2-deoxyguanosine by a NO/O2 gas mixture : identification and"Org.Lett.. 5. 3173-3176 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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