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Challenge in computational science toward the identification of the reaction pathway for the formation of nucleic acids-small molecule complexes

Research Project

Project/Area Number 19K22254
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 37:Biomolecular chemistry and related fields
Research InstitutionOsaka University

Principal Investigator

Nakatani Kazuhiko  大阪大学, 産業科学研究所, 教授 (70237303)

Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2019: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
KeywordsRNA / 標的 / 低分子 / 創薬 / 誘導適合 / 量子計算 / DNA / 複合体 / 形成経路 / 量子化学計算 / 核酸 / 形成過程 / 計算機科学 / 低分子複合体 / 複合体形成過程 / 計算科学
Outline of Research at the Start

低分子とRNAの複合体形成は、動的な構造変化を伴う「誘導適合」で進むため、RNA結合分子の設計はほぼ困難である。誘導適合型の低分子-RNA結合の本質的な理解と、研究者が気付かない複合体形成要因の解明が不可欠である。本提案研究では、GRRM法による経路探索とDLPNO-CCSD(T)等の超高精密エネルギー計算を組み合わせ、これまで誰も考えもしなかった巨大な分子サイズを持つ「低分子-RNA複合体」の形成経路を理論科学的に解き明かし、律速段階同定、複合体形成の決定的記述子の同定、その分子設計へのフィードバックと効果実証などにより、RNA標的低分子創成を一気に加速させる。

Outline of Final Research Achievements

The present study aimed to understand the essential nature of induced conformational small molecule-RNA binding with dynamic conformational changes. For the structurally analyzed small molecule DANP-C bulge complex, we generated an initial structure in which the DANP on the opposite side of the cytosine bulge was pulled apart at an appropriate distance perpendicular to the hydrogen bond, and the stable structure from that structure was determined by simulation. As a result, it was found that there are multiple transition states before the complex structure is formed, i.e., the coordinates at which the original structure is no longer restored, and a clue to the structure of the transition states was obtained through precise structural analysis. Parameters for quantum chemical calculations were derived, and structural optimization at the wb97xd/6-31+gd level of the density functional theory was performed in water.

Academic Significance and Societal Importance of the Research Achievements

これから将来極めて有望であり、必ずや創薬研究に必要となるRNAを標的とする低分子創成のボトルネックは、RNA-低分子複合体形成が誘導適合型であるためシミュレーションが難しいことにある。この問題点を解決し、我が国がRNAを標的とする低分子創成研究で主導権を握ることを目的として、最新の革新的計算科学手法を世界にさきがけて低分子-核酸複合体という巨大分子系に適用し、低分子-RNA複合体形成経路の計算科学による解明を基盤とするRNA標的低分子創成の加速、本領域における主導権の掌握を狙った。結果的には目標に到達できなかったが、本研究は、RNA標的低分子創薬に資する研究である。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2022 2021 2020 2019 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (2 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Remarks (1 results)

  • [Journal Article] Possibilities and challenges of small molecule organic compounds for the treatment of repeat diseases2022

    • Author(s)
      NAKATANI Kazuhiko
    • Journal Title

      Proceedings of the Japan Academy, Series B

      Volume: 98 Issue: 1 Pages: 30-48

    • DOI

      10.2183/pjab.98.003

    • NAID

      130008140767

    • ISSN
      0386-2208, 1349-2896
    • Year and Date
      2022-01-11
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] HT-SELEX-based identification of binding pre-miRNA hairpin-motif for small molecules2022

    • Author(s)
      Mukherjee Sanjukta、Murata Asako、Ishida Ryoga、Sugai Ayako、Dohno Chikara、Hamada Michiaki、Krishna Sudhir、Nakatani Kazuhiko
    • Journal Title

      Molecular Therapy - Nucleic Acids

      Volume: 27 Pages: 165-174

    • DOI

      10.1016/j.omtn.2021.11.021

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Small molecule targeting r(UGGAA)n disrupts RNA foci and alleviates disease phenotype in Drosophila model2021

    • Author(s)
      Shibata Tomonori、Nagano Konami、Ueyama Morio、Ninomiya Kensuke、Hirose Tetsuro、Nagai Yoshitaka、Ishikawa Kinya、Kawai Gota、Nakatani Kazuhiko
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 1-13

    • DOI

      10.1038/s41467-020-20487-4

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Chemical Probing of Thymine in the TGG/CGG Triad to Explore the Deamination of 5-Methylcytosine in the CGG Repeat2020

    • Author(s)
      Yagi Yuki、Yamada Takeshi、Nakatani Kazuhiko
    • Journal Title

      Biochemistry

      Volume: 59 Issue: 29 Pages: 2679-2683

    • DOI

      10.1021/acs.biochem.0c00333

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] DNAミスマッチ部位に結合する小分子に関する分子動力学および量子化学計算による研究2019

    • Author(s)
      宮川 晃一, 庄司 光男, 中谷 和彦, 重田 育照, 山口 兆
    • Organizer
      第13回分子科学討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] Small Molecules targeting Repeat Sequences causing Neurological Disorders2019

    • Author(s)
      中谷和彦
    • Organizer
      IUPAC International Symposium on Bioorganic Chemistry (ISBOC-12)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] 中谷研究室

    • URL

      http://www.sanken.osaka-u.ac.jp/labs/rbc/

    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2023-01-30  

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