Controlling the Catalytic Functions of DNAzymes within Constitutional Dynamic Networks of DNA Nanostructures.
Fiche publication
Date publication
juillet 2017
Journal
Journal of the American Chemical Society
Auteurs
Membres identifiés du Cancéropôle Est :
Pr LEHN Jean-Marie
Tous les auteurs :
Wang S, Yue L, Shpilt Z, Cecconello A, Kahn JS, Lehn JM, Willner I
Lien Pubmed
Résumé
Mimicking complex cellular dynamic chemical networks being up-regulated or down-regulated by external triggers is one of the challenges in system chemistry. Constitutional dynamic networks, CDNs, composed of exchangeable components that respond to environmental triggers by self-adaption, provide general means to mimic biosystems. We use the structural and functional information encoded in nucleic acid nanostructures to construct effector (input)-triggered constitutional dynamic networks that reveal adaptable catalytic properties. Specifically, CDNs composed of four exchangeable constituents, AA', A'B, AB' and BB', are constructed. In the presence of an effector (input) that controls the stability of one of the constituents, the input-guided up-regulation or down-regulation of the CDNs constituents proceeds. As effectors we apply the fuel-strand stabilization of one of the CDN constituents by the formation of the T-A•T triplex structure or by the K(+)-ion-induced stabilization of one of the CDN constituents via the formation of a K(+)-ion-stabilized G-quadruplex. Energetic stabilization of one of the CDN constituent leads to a new dynamically adapted network composed of up-regulated and down-regulated constituents. By applying counter triggers to the effector units, e.g., an anti-fuel strand or 18-crown-6-ether, reconfiguration to the original CDNs is demonstrated. The performance of the CDNs is followed by the catalytic activities of the constituents, and by complementary quantitative gel electrophoresis experiments. The orthogonal triggered and switchable operation of the CDNs is highlighted.
Mots clés
Biocatalysis, DNA, chemistry, DNA, Catalytic, chemistry, Molecular Dynamics Simulation, Nanostructures, chemistry, Nucleic Acid Conformation
Référence
J. Am. Chem. Soc.. 2017 Jul 19;139(28):9662-9671