2014
Ion Binding to Quadruplex DNA Stems. Comparison of MM and QM Descriptions Reveals Sizable Polarization Effects Not Included in Contemporary Simulations
GKIONIS, Konstantinos, Holger KRUSE, James PLATTS, Arnošt MLÁDEK, Jaroslav KOČA et. al.Základní údaje
Originální název
Ion Binding to Quadruplex DNA Stems. Comparison of MM and QM Descriptions Reveals Sizable Polarization Effects Not Included in Contemporary Simulations
Autoři
GKIONIS, Konstantinos (300 Řecko, domácí), Holger KRUSE (276 Německo, domácí), James PLATTS (826 Velká Británie a Severní Irsko), Arnošt MLÁDEK (203 Česká republika), Jaroslav KOČA (203 Česká republika, domácí) a Jiří ŠPONER (203 Česká republika, garant, domácí)
Vydání
Journal of Chemical Theory and Computation, Washington DC, American Chemical Society, 2014, 1549-9618
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10403 Physical chemistry
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 5.498
Kód RIV
RIV/00216224:14740/14:00075657
Organizační jednotka
Středoevropský technologický institut
UT WoS
000332913500041
Klíčová slova anglicky
MOLECULAR-DYNAMICS SIMULATIONS; GAUSSIAN-BASIS SETS; TETRAMOLECULAR G-QUADRUPLEXES; HUMAN TELOMERIC QUADRUPLEX; AIM TOPOLOGICAL ANALYSIS; FORCE-FIELD; STRUCTURAL DYNAMICS; NUCLEIC-ACIDS; ELECTRONIC DENSITY; DIELECTRIC MEDIUM
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 12. 8. 2014 10:11, Martina Prášilová
Anotace
V originále
Molecular mechanical (MM) force fields are commonly employed for biomolecular simulations. Despite their success, the nonpolarizable nature of contemporary additive force fields limits their performance, especially in long simulations and when strong polarization effects are present. Guanine quadruplex D(R)NA molecules have been successfully studied by MM simulations in the past. However, the G-stems are stabilized by a chain of monovalent cations that create sizable polarization effects. Indeed, simulation studies revealed several problems that have been tentatively attributed to the lack of polarization. Here, we provide a detailed comparison between quantum chemical (QM) DFT-D3 and MM potential energy surfaces of ion binding to G-stems and assess differences that may affect MM simulations. We suggest that MM describes binding of a single ion to the G-stem rather well. However, polarization effects become very significant when a second ion is present. We suggest that the MM approximation substantially limits accuracy of description of energy and dynamics of multiple ions inside the G-stems and binding of ions at the stem loop junctions. The difference between QM and MM descriptions is also explored using symmetry-adapted perturbation theory and quantum theory of atoms in molecules analyses, which reveal a delicate balance of electrostatic and induction effects.
Návaznosti
ED1.1.00/02.0068, projekt VaV |
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286154, interní kód MU |
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