期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 151, 期 -, 页码 976-983出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2019.10.181
关键词
DNAzyme; Tetramolecular G-quadruplex; Peroxidase activity; Hemin
资金
- Department of Pharmacy, University of Naples Federico II, Fondo di finanziamento per le attivita base di ricerca (FFABR)
- CNRS
- Agence Nationale de la Recherche [ANR-17-CE17-0010-01]
- Universite de Bourgogne
- Conseil Regional de Bourgogne (PARI)
- European Union
- Agence Nationale de la Recherche (ANR) [ANR-17-CE17-0010] Funding Source: Agence Nationale de la Recherche (ANR)
Here we report on the design of a new catalytic G-quadruplex-DNA system (G4-DNAzyme) based on the modification of the DNA scaffold to provide the DNA pre-catalyst with two identical 3'-ends, known to be more catalytically proficient than the 5'-ends. To this end, we introduced a 5'-5' inversion of polarity site in the middle of the G4-forming sequences AG(4)A and AG(6)A to obtain d((3')AGG(5')-(5')GGA(3')) (or AG(2)-G(2)A) and d((3')AGG(5')-(5')GGA(3')) (or AG(3)-G(3)A) that fold into stable G4 whose tetramolecular nature was confirmed via nuclear magnetic resonance (NMR) and circular dichroism (CD) investigations. Both AG(2)-G(2)A and AG(3)-G(3)A display two identical external G-quartets (3'-ends) known to interact with the cofactor hemin with a high efficiency, making the resulting complex competent to perform hemoprotein-like catalysis (G4-DNAzyme). A systematic comparison of the performances of modified and unmodified G4s lends credence to the relevance of the modification exploited here (5'-5' inversion of polarity site), which represents a new chemical opportunity to improve the overall activity of catalytic G4s. (C) 2019 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据