Abstract:
:We studied the structure and dynamics of star-shaped polymers by means of coarse-grained molecular dynamics simulations and analysis of structural transitions of semi-flexible macromolecules confined in nano-channels. The conformation of star arms in narrow channels is given by the channel width, arm flexibility and number of arms aligned together in the given region along the channel. We focused on the conformation transition, where all arms are initially stretched in one direction of the narrow channel and were interested in the process of how individual arms escape into a free volume region of channel. We found that the escape transition does not proceed from arm ends but progresses by extension of a loop starting from the branch point; the arms escape in individual steps and the extension of arms depends on how many arms align in parallel in the channel.
journal_name
J Mol Modeljournal_title
Journal of molecular modelingauthors
Račko D,Cifra Pdoi
10.1007/s00894-015-2735-9subject
Has Abstractpub_date
2015-07-01 00:00:00pages
186issue
7eissn
1610-2940issn
0948-5023journal_volume
21pub_type
杂志文章abstract::Recently, great attention has been focused on using epoxy polymers in different fields such as aerospace, automotive, biotechnology, and electronics, owing to their superior properties. In this study, the classical molecular dynamics (MD) was used to simulate the cross linking of diglycidyl ether of bisphenol-A (DGEBA...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-013-1906-9
更新日期:2013-09-01 00:00:00
abstract::In order to understand the mechanisms of ligand binding and the interaction between the ligand and the bovine phenol sulfotransferase, (bSULT1A1, EC 2.8.2.1) a three-dimensional (3D) model of the bSULT1A1 is generated based on the crystal structure of the estrogen sulfotransferase (PDB code 1AQU) by using the InsightI...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-004-0225-6
更新日期:2005-03-01 00:00:00
abstract::Insulin-like growth factor-binding proteins (IGFBPs) control bioactivity and distribution of insulin-like growth factors (IGFs) through high-affinity complex of IGFBP and IGF. To get more insight into the binding interaction of IGF system, the site-directed mutagenesis and force-driving desorption methods were employe...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-013-2020-8
更新日期:2013-12-01 00:00:00
abstract::The quinolinol derivatives clioquinol (5-chloro-7-iodo-8-quinolinol, Quinoform) and cloxiquine (5-chloro-8-quinolinol) were studied experimentally in the solid state via ³⁵Cl NQR, ¹H-¹⁷O and ¹H-¹⁴N NQDR spectroscopies, and theoretically by density functional theory (DFT). The supramolecular synthon pattern of O-H···N ...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-010-0876-4
更新日期:2011-07-01 00:00:00
abstract::Antihistamines are frequently used pharmaceuticals that treat the symptoms of allergic reactions. Loratadine (LOR) is an active component of the second generation of selective antihistaminic pharmaceutical usually known as Claritin. Frequent usage of this type of pharmaceuticals imposes the need for understanding thei...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-016-3101-2
更新日期:2016-10-01 00:00:00
abstract::A practical mixed basis set was developed to facilitate accurate calculations of potential energy surfaces for π-stacking interactions. Correlation consistent basis sets (cc-PVXZ) were augmented by p-type Gaussian functions placed above and below the planes of C6 moieties. Møller-Plesset (MP2, SCS-MP2) and coupled clu...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-014-2558-0
更新日期:2015-01-01 00:00:00
abstract::The binding of the reductase inhibitor drug fluvastatin, hydroxy-3-methylglutaryl coenzyme A, with the hydrophilic ι- or λ-carrageenan polymers, serving as potential controllers of the drug's release rate, have been studied at the density functional level of theory with the B3LYP exchange correlation functional. Three...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-010-0878-2
更新日期:2011-07-01 00:00:00
abstract::The mechanism of the thermal rearrangement of substituted N-acyl-2,2-dimethylaziridines 1 has been studied using quantum chemistry methods. Geometries of reactants, transition states and products have been optimized at the B3LYP/6-311++G(2d,2p) level. Relative energies for various stationary points have been determine...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-013-1959-9
更新日期:2013-10-01 00:00:00
abstract::Some recent papers clearly indicate that the cytoplasmic domain of KcsA plays a role in pH sensing. We have performed, for the first time, a targeted molecular dynamics (TMD) simulation of the opening of full-length KcsA at pH 4 and pH 7, with a special interest for the cytoplasmic domain. Association energy calculati...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-012-1726-3
更新日期:2013-04-01 00:00:00
abstract::Amorphous molecular simulation to model the reaction species in the synthesis of chemically inert and energetic 1,1-diamino-2,2-dinitroethene (DADNE) explosive material was performed in this work. Nitromethane was selected as the starting reactant to undergo halogenation, nitration, deprotonation, intermolecular conde...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-016-3182-y
更新日期:2017-01-01 00:00:00
abstract::In this theoretical study we used density functional theory to calculate the molecular and crystalline structures of sodium selenite. Our structural results were compared with experimental data. From the molecular structure we determined the ionization potential, electronic affinity, and global reactivity parameters l...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-010-0766-9
更新日期:2011-04-01 00:00:00
abstract::A coarse-grained Brownian dynamics model was used to simulate two proteins of similar sizes inside model membrane pores of varying size and hydrophobicity. The two proteins, which have radii of gyration of approximately 9.5 Å in their native states, are a 36-residue hydrophilic villin head piece (HP-36) and a 40-resid...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-019-3985-8
更新日期:2019-04-25 00:00:00
abstract::In this study, the binding of Bovine serum albumin (BSA) with three flavonoids, kaempferol-3-O-a-L-rhamnopyranosyl-(1-3)-a-L-rhamnopyranosyl-(1-6)-b-D-galacto- pyranoside (drug 1),kaempfol-7-O-rhamnosyl-3-O-rutinoside (drug 2)andkaempferide-7-O-(4"-O-acetylrhamnosyl)-3-O-ruti- noside (drug 3) is investigated by molecu...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-012-1649-z
更新日期:2013-03-01 00:00:00
abstract::We investigate the conformational properties of a potent inhibitor of neuropilin-1, a protein involved in cancer processes and macular degeneration. This inhibitor consists of four aromatic/conjugated fragments: a benzimidazole, a methylbenzene, a carboxythiourea, and a benzene-linker dioxane, and these fragments are ...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-014-2472-5
更新日期:2014-11-01 00:00:00
abstract::The analysis of the electronic-structure changes along IRC paths for double-proton-transfer reactions in the formamide dimer (R1), formamide-thioformamide system (R2), and the thioformamide dimer (R3) was performed based on the extended-transition-state natural orbitals for chemical valence (ETS-NOCV) partitioning of ...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-017-3564-9
更新日期:2017-12-22 00:00:00
abstract::3-phosphoinositide-dependent protein kinase-1 (PDK1) plays a crucial role in the signal transduction of massive growth-related protein kinases. In this work, a computational study has been performed to investigate the binding pose of the hydrolyzed product of SBF1 (SBF1-) with PDK1. The binding pose was predicted by V...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-019-4069-5
更新日期:2019-06-13 00:00:00
abstract::To date, no suitable vaccine or specific antiviral drug is available to treat Chikungunya viral (CHIKV) fever. Hence, it is essential to identify drug candidates that could potentially impede CHIKV infection. Here, we present the development of a homology model of nsP2 protein based on the crystal structure of the nsP...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-011-1018-3
更新日期:2012-01-01 00:00:00
abstract::Extremely extensive calculations of potential energy surfaces for the parallel-displaced configuration of pyridine dimer systems have been carried out using a dispersion-corrected density functional. Instead of focusing on stationary geometries these calculations provide much deeper insight into the "landscape" of the...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-017-3496-4
更新日期:2017-11-09 00:00:00
abstract::The theoretical three-dimensional structure of a novel δ-endotoxin Cry1Id (81 kDa) belonging to Cry1I class, toxic to many of the lepidopteran pests has been investigated through comparative modeling. Molecular dynamics (MD) simulations was carried out to characterize its structural and dynamical features at 10 ns in ...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-013-2010-x
更新日期:2013-12-01 00:00:00
abstract::In the present investigation, the first hyperpolarizability of alkali and alkaline earth metal derivatives of cyclooctatetraene (COT) has been calculated using BHHLYP and CAM-B3LYP functional for 6-311++G(d,p), 6-311++G(3df,3pd), and aug-pc 2 basis sets. Introduction of Na/K atoms at the axial position of COT and Li, ...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-017-3273-4
更新日期:2017-03-01 00:00:00
abstract::We investigate the chemical reactivities, aromatic properties, and UV-Vis absorption spectra of four constitutional isomers of 1-butoxy-4-methoxybenzenepillar[5]arene with the DFT and TDDFT methods. These characteristics in the gas and solvent phases are discussed on the basis of electronic energy, the highest occupie...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-016-3076-z
更新日期:2016-09-01 00:00:00
abstract::The electric field induced within a molecule by its electrons determines a whole series of important physical properties of the molecule. In particular, the values of the gradient of this field at the nuclei determine the interaction of their quadrupole moments with the electrons. Using unsymmetrical one-range additio...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-010-0851-0
更新日期:2011-06-01 00:00:00
abstract::Theoretical adiabatic electron affinities are often considered inaccurate because they are referenced to only a single value. Ground state electron affinities for all the main group elements and homonuclear diatomics were identified recently using the normalized binding energy of the hydrogen atom: [0.75420375(3)/2 = ...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-015-2598-0
更新日期:2015-04-01 00:00:00
abstract::Ethanol and water are the solvents most commonly used to extract flavonoids from propolis. Do hydrogen-bonding interactions exist between flavonoids and ethanol/water? In this work, this question was addressed by using density functional theory (DFT) to provide information on the hydrogen-bonding interactions between ...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-016-2968-2
更新日期:2016-04-01 00:00:00
abstract::The energetic and electronic structure of various water dimer isomers has been explored through DFT methodology. Six different possible water dimers come in two broad categories, planar and non-planar. In each of the categories, three distinct topologies (i) linear, (ii) ring and (iii) bifurcated, have been obtained. ...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-019-4274-2
更新日期:2020-01-06 00:00:00
abstract::Molecular-dynamics simulations have been used to study the diffusion of a short single model carbonic chain on the graphite (001) surface. The calculated diffusion coefficient (D) first increases, then decreases with increasing chain length (N). This abnormal behavior is similar to polymer lateral diffusion at the sol...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-005-0064-0
更新日期:2006-03-01 00:00:00
abstract::The mechanism and regioselectivity of [3+2] cycloaddition (32CA) reactions of benzonitrile oxide with ethyl trans-cinnamate, ethyl crotonate and trans-2-penten-1-ol has been studied in gas phase and in acetonitrile, ethyl acetate and tetrahydrofuran using the B3LYP functional in connection with 6-31G(d) basis set. The...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-020-04547-6
更新日期:2020-09-22 00:00:00
abstract::The effect of a strong electric field generated by molecular dipoles on the ground state electronic structure and the Q and B states as well as the lowest charge transfer (CT) excited state of porphine-2,5-dimethyl-1,4-benzoquinone (PQ) complex has been investigated theoretically. Density functional theory DFT and tim...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-012-1595-9
更新日期:2013-02-01 00:00:00
abstract::In this work, hybrid functional and G4 methods were employed in the rational design of carbonitrile-carboxaldehyde receptor models for cation recognition. Electron-sharing and ionic interactions between the models and the cations were analyzed utilizing the concepts of overlap population, atomic valence, electrostatic...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-014-2428-9
更新日期:2014-09-01 00:00:00
abstract::The geometric and electronic structure of tetracyanoethylene (TCNE)-aniline (donor-acceptor type) complex has been investigated in gas phase using ab initio and time dependent density functional theory calculations. Both the above calculations predict a composed structure for the complex, in which the interacting site...
journal_title:Journal of molecular modeling
pub_type: 杂志文章
doi:10.1007/s00894-008-0443-4
更新日期:2009-08-01 00:00:00