The Effect of Carbon Nanotube on Improving Catalytic G-quadruplex Sensing Properties

Subject Areas : Polymer

Fahimeh Otovat ¹ ( Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Hakimiyeh, Tehran, Iran )
Mohammad Reza Bozorgmehr ² ( Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran )
Ali Mahmoudi ³ ( Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Hakimiyeh, Tehran, Iran )
Ali Morsali ⁴ ( Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran )

Received: 2023-12-13 Accepted : 2023-12-13 Published : 2023-10-01

Keywords:

Abstract :

In the use of G-quadruplex as DNAzyme, the background signal corresponding to Hemin is high.Therefore, it limits the application of DNAzyme. If carbon nanotubes are added to the system containing G-quadruplex and Hemin, this problem will be solved. However, the mechanism of the nanotube effect on DNAzyme is not known. In this work, molecular dynamics simulation was used to clarify this mechanism. The interaction between G-quadruplex and Hemin was simulated in the presence and absence of carbon nanotubes. The calculated distance between the center of mass ofG-quadruplex and Hemin during the simulation time shows that the nanotube increases the affinity of hemin to G-quadruplex. Also, the calculation of the conformational factor of the G-quadruplex residues shows that Hemin is bonded to the G-quadruplex from the top and side. The obtained results are in good agreement with the available experimental evidence.

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