Ionic liquids make DNA rigid

Garai, Ashok ; Ghoshdastidar, Debostuti ; Senapati, Sanjib ; Maiti, Prabal K. (2018) Ionic liquids make DNA rigid Journal of Chemical Physics, 149 (4). 045104. ISSN 0021-9606

Full text not available from this repository.

Official URL: http://doi.org/10.1063/1.5026640

Related URL: http://dx.doi.org/10.1063/1.5026640

Abstract

Persistence length of double-stranded DNA (dsDNA) is known to decrease with an increase in ionic concentration of the solution. In contrast to this, here we show that the persistence length of dsDNA increases dramatically as a function of ionic liquid (IL) concentration. Using all atom explicit solvent molecular dynamics simulations and theoretical models, we present, for the first time, a systematic study to determine the mechanical properties of dsDNA in various hydrated ILs at different concentrations. We find that dsDNA in 50 wt % ILs have lower persistence length and stretch modulus in comparison to 80 wt % ILs. We further observe that both the persistence length and stretch modulus of dsDNA increase as we increase the concentration of ILs. The present trend of the stretch modulus and persistence length of dsDNA with IL concentration supports the predictions of the macroscopic elastic theory, in contrast to the behavior exhibited by dsDNA in monovalent salt. Our study further suggests the preferable ILs that can be used for maintaining DNA stability during long-term storage. ACKNOWLE

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
ID Code:123979
Deposited On:26 Oct 2021 07:34
Last Modified:26 Oct 2021 07:34

Repository Staff Only: item control page