Artículo
Charge transport in poly(dG)-poly(dC) and poly(dA)-poly(dT) DNA polymers
Autor/es | Hennig, Dirk
Starikov, Eugen B. Archilla, Juan F. R. Palmero Acebedo, Faustino |
Departamento | Universidad de Sevilla. Departamento de Física Aplicada I |
Fecha de publicación | 2003 |
Fecha de depósito | 2016-02-22 |
Publicado en |
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Resumen | We investigate the charge transport in synthetic DNA polymers built up
from single types of base pairs. In the context of a polaron-like model,
for which an electronic tight-binding system and bond vibrations of the
double ... We investigate the charge transport in synthetic DNA polymers built up from single types of base pairs. In the context of a polaron-like model, for which an electronic tight-binding system and bond vibrations of the double helix are coupled, we present estimates for the electron-vibration coupling strengths utilizing a quantum-chemical procedure. Subsequent studies concerning the mobility of polaron solutions, representing the state of a localized charge in unison with its associated helix deformation, show that the system for poly(dG)-poly(dC) and poly(dA)-poly(dT) DNA polymers, respectively possess quantitatively distinct transport properties. While the former supports unidirectionally moving electron breathers attributed to highly efficient long-range conductivity the breather mobility in the latter case is comparatively restrained inhibiting charge transport. Our results are in agreement with recent experimental results demonstrating that poly(dG)-poly(dC) DNA molecules acts as a semiconducting nanowire and exhibits better conductance than poly(dA)-poly(dT) ones. |
Cita | Hennig, D., Starikov, E.B., Archilla, J.F.R. y Palmero Acebedo, F. (2003). Charge transport in poly(dG)-poly(dC) and poly(dA)-poly(dT) DNA polymers. Journal of Biological Physics, 30 (3), 227-238. |
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