DNA Cholesteric Phases: The Role of DNA Molecular Chirality and DNA−DNA Electrostatic Interactions
作者： A. G. Cherstvy
DOI: 10.1021/JP801220P
关键词: Molecule 、 Crystallography 、 Nucleosome 、 DNA 、 Chemistry 、 Intermolecular force 、 Electrostatics 、 Steric effects 、 Chirality (chemistry) 、 Affinities
摘要: DNA molecules form dense liquid-crystalline twisted phases both in vivo and vitro. How the microscopic chirality is transferred into intermolecular twist these mesophases what role of chiral DNA−DNA electrostatic interactions still not completely clear. In this paper, we first give an extended overview experimental observations on cholesteric discuss factors affecting their stability. Then, consider effects steric grooved helical sign twist. We present some theoretical results strength interactions, azimuthal correlations phases, value pitch, regions existence stabilized by interactions. suggest for instance that 146 bp long fragments with stronger affinities nucleosome formation can less a larger...
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