TY - JOUR
T1 - Controlling the Catalytic Functions of DNAzymes within Constitutional Dynamic Networks of DNA Nanostructures
AU - Wang, Shan
AU - Yue, Liang
AU - Shpilt, Zohar
AU - Cecconello, Alessandro
AU - Kahn, Jason S.
AU - Lehn, Jean Marie
AU - Willner, Itamar
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/7/19
Y1 - 2017/7/19
N2 - Mimicking complex cellular dynamic chemical networks being up-regulated or down-regulated by external triggers is one of the challenges in systems 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′, BA′, 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 CDN's 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 constituents 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 antifuel 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.
AB - Mimicking complex cellular dynamic chemical networks being up-regulated or down-regulated by external triggers is one of the challenges in systems 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′, BA′, 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 CDN's 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 constituents 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 antifuel 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.
UR - http://www.scopus.com/inward/record.url?scp=85024919667&partnerID=8YFLogxK
U2 - 10.1021/jacs.7b04531
DO - 10.1021/jacs.7b04531
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C2 - 28627887
AN - SCOPUS:85024919667
SN - 0002-7863
VL - 139
SP - 9662
EP - 9671
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 28
ER -