• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2018 Fiscal Year Final Research Report

Development of DNA strand displacement reactions using bifacial nucleobases that form both hydrogen-bonded and metal-mediated base pairs

Research Project

  • PDF
Project/Area Number 16K14029
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Bio-related chemistry
Research InstitutionThe University of Tokyo

Principal Investigator

Takezawa Yusuke  東京大学, 大学院理学系研究科(理学部), 助教 (70508598)

Project Period (FY) 2016-04-01 – 2019-03-31
KeywordsDNA / 人工塩基対 / 鎖交換反応 / 金属錯体 / 人工核酸
Outline of Final Research Achievements

We have developed metal-triggered DNA strand displacement reactions by utilizing bifacial unnatural nucleobases that form both hydrogen-bonded base pairs and metal-mediated base pairs. 5-hydroxyuracil (UOH) bases were incorporated into DNA strands and the Gd(III)-triggered strand displacement was demonstrated based on the reversible switching between hydrogen-bonded UOH-A base pairs and metal-mediated UOH-Gd(III)-UOH base pairs. In addition, a 5-carboxyuracil base was found to form both hydrogen-bonded and metal-mediated base pairs in DNA duplexes, and thus would be utilized for metal-triggered strand displacement reactions.

Free Research Field

生体関連化学

Academic Significance and Societal Importance of the Research Achievements

DNA鎖交換反応は生体内では相同組換えの過程でも見られるが、近年ではDNAナノ構造体の動的変換などDNAナノテクノロジーの分野でも活用されている。本研究で開発した金属錯体形成に基づくDNA鎖交換反応は、金属イオンを外部刺激として駆動するDNA分子マシンの開発や、機能性人工核酸の機能スイッチングなどへの応用が期待される。特に、水素結合型塩基対と金属錯体型塩基対の双方を形成する「ヤヌス型人工核酸塩基」の設計戦略は、外部刺激応答性のDNA材料や機能性核酸の新規なビルディングブロックとして有用であると考えられる。

URL: 

Published: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi