作者: Indrajit Deb , Joanna Sarzynska , Lennart Nilsson , Ansuman Lahiri
DOI: 10.1021/CI400582A
关键词: RNA 、 Force field (chemistry) 、 Computational chemistry 、 Molecular dynamics 、 Nucleic acid structure 、 Pseudouridine 、 Chemistry 、 Molecular conformation 、 Dihydrouridine 、 Thermodynamics
摘要: The widespread occurrence of modified residues in RNA sequences necessitates development accurate parameters for these modifications reliable modeling structure and dynamics. A comprehensive set the 107 naturally occurring was proposed by Aduri et al. (J. Chem. Theory Comput. 2007, 3, 1464-1475) AMBER FF99 force field. In this work, we tested on a uridine residues, namely, dihydrouridine, 2-thiouridine, 4-thiouridine, pseudouridine, uridine-5-oxyacetic acid, performing molecular dynamics replica exchange simulations nucleosides. Although our using field did not, general, reproduce experimentally observed conformational characteristics well, combination parameter with recent revisions showed noticeable improvement some