AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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Authors: ATTILA BENDE.
The role of different positively (Na+ , K+ , Mg2+ ) and negatively (Cl‾) charged ions on the interaction between the negatively charged PO4‾ group of DNA and the positively charged histone protein side chains of lysine and arginine amino acids have been investigated using ab initio quantum chemical methods. The analysis of the intermolecular interaction have shown that the positively charged ions polarize the negative charges on the PO4‾ group which weaken the electrostatic interaction between the negative side of the DNA and the positive part of the histone protein. Similarly, the negatively charged Cl‾ ion can drastically change the charge distribution on the positively charged lysine or arginine amino acids and again weaken the electrostatic interaction between the negative side of the DNA and the positive part of the histone protein.
Keywords: Ab initio methods, DNA, histone, ions, nucleosome
