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Title: | Study of light-induced formation of photodimers in the i-motif nucleic acid structure by rapid-scan FTIR difference spectroscopy and hybrid hard- and soft-modelling |
Author: | Benabou Zdaou, Sanae Ruckebusch, Cyril Sliwa, Michel Aviñó Andrés, Anna Eritja i Casadellà, Ramon Gargallo Gómez, Raimundo Juan Capdevila, Anna de |
Keywords: | Quimiometria Espectroscòpia infraroja Chemometrics Infrared spectroscopy |
Issue Date: | 10-Jul-2018 |
Publisher: | Royal Society of Chemistry |
Abstract: | The i-motif is a DNA structure formed by cytosine-rich sequences, very relevant from a biochemical point of view and potentially useful in Nanotechnology as pH-sensitive nanodevices or nanomotors. To provide a different view on the structural changes and dynamics of direct excitation processes involving i-motif structures, the use of rapid scan FTIR spectroscopy is proposed. Hybrid hard- and soft-modelling based on the Multivariate Curve Resolution by Alternating least squares (MCR-ALS) algorithm has been used for the resolution of rapid-scan FTIR spectra and the interpretation of the photochemically induced time-dependent conformational changes of i-motif structures. The hybrid hard- and soft-modelling version of MCR-ALS (HS-MCR), which allows the introduction of kinetic models to describe the process behavior, provides also rate constants associated with the transitions modeled. The results show that i-motif structures formed by short DNA sequences present higher structural changes upon UV irradiation than those formed by long sequences with additional structural stabilizing elements, such as hairpins. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1039/C8CP00850G |
It is part of: | Physical Chemistry Chemical Physics, 2018, vol. 20, p. 19635-19646 |
URI: | http://hdl.handle.net/2445/127350 |
Related resource: | https://doi.org/10.1039/C8CP00850G |
ISSN: | 1463-9076 |
Appears in Collections: | Articles publicats en revistes (Enginyeria Química i Química Analítica) |
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