Mechanism for the depolymerization of cellulose under alkaline conditions.

abstract：:Hyaluronan lyase from Streptococcus pneumoniae can degrade hyaluronic acid, which is one of the major components in the extracellular matrix. Hyaluronan can regulate water balance, osmotic pressure, and act as an ion exchange resin. Followed by our recent work on the catalytic reaction mechanism and substrate binding ...

journal_title：Journal of molecular modeling

authors： Li F,Xu D

更新日期：2015-08-01 00:00:00

abstract：:The Schiff base compound, 2-[(4-Fluorophenylimino)methyl]-3,5-dimethoxyphenol, has been synthesized and characterized by IR, electronic spectroscopy, and X-ray single-crystal determination. Molecular geometry from X-ray experiment of the title compound in the ground state have been compared using the Hartree-Fock (HF)...

journal_title：Journal of molecular modeling

authors： Tanak H,Ağar A,Yavuz M

更新日期：2010-03-01 00:00:00

abstract：:Our recent molecular dynamics (MD) simulation of an insertion/duplication mutant 'L20' of bacteriophage T4 lysozyme demonstrated a solvent induced α→β transition in a loosely held duplicate helical region, while α-helical conformation in the parent region was relatively stabilized by its tertiary interactions with the...

journal_title：Journal of molecular modeling

authors： Kaur H,Sasidhar YU

更新日期：2015-04-01 00:00:00

abstract：:We present a critical discussion related to the recent definition of the intrinsic reactivity index, IRI, (Tetrahedron Lett. 2013, 54, 339-342; Tetrahedron 2013, 69, 4247-4258) formulated to describe both, electrophilicity (charge acceptance) and nucleophilicity (charge donation) reactivities. We here stress that such...

journal_title：Journal of molecular modeling

authors： Chamorro E,Melin J

更新日期：2015-03-01 00:00:00

abstract：:The aquatic leech, Theromyzon tessulatum, secretes a proteinaceous cocoon with extraordinary physical properties (e.g., proteolytic, thermal resiliency). The deduced amino acid sequence of a major protein (Tcp-Theromyzon cocoon protein) from the T. tessulatum cocoon wall has been used to model the endogenous structure...

journal_title：Journal of molecular modeling

authors： Mason TA,McIlroy PJ,Shain DH

更新日期：2006-09-01 00:00:00

abstract：:Carbon monoxide (CO) and oxygen (O2) catalyzed by small neutral iron oxide clusters (FeO(1-3)) was investigated at the density functional level of theory using the Becke-Perdew-Wang functional (BPW91). Three reaction pathways along with singlet, triplet and quintet states were calculated for ascertaining the presence ...

journal_title：Journal of molecular modeling

authors： Wang HJ,Wang YC

更新日期：2014-06-01 00:00:00

abstract：:Cyclin-dependent kinases (Cdks) play important roles in the regulation of the cell cycle. Their inhibitors have entered clinical trials to treat cancer. Very recently, Davis et al. (Nat Struct Biol 9:745-749, 2002) have found a ligand NU6102, which has a high affinity with cyclin-dependent kinase 2 (K(i) = 6 nM) but a...

journal_title：Journal of molecular modeling

authors： Jiang Y,Zou J,Gui C

更新日期：2005-11-01 00:00:00

abstract：:The role of resultant gradient-information concept, reflecting the kinetic energy of electrons, in shaping the molecular electronic structure and reactivity preferences of open reactants is examined. This quantum-information descriptor combines contributions due to both the modulus (probability) and phase (current) co...

journal_title：Journal of molecular modeling

authors： Nalewajski RF

更新日期：2019-08-16 00:00:00

abstract：:Density functional theory and its time-dependent extension (DFT, TDDFT) were employed to establish the feasibility of using a series of 4,4-difluoro-4-bora-3a,4a-diaza-s-indacenes (BODIPYs) in photodynamic therapy. Their absorption electronic spectra, singlet-triplet energy gaps, and spin-orbit matrix elements were co...

journal_title：Journal of molecular modeling

authors： Ponte F,Mazzone G,Russo N,Sicilia E

更新日期：2018-06-29 00:00:00

abstract：:The mechanism of the cycloaddition reaction CH3M≡MCH3 (M=C, Si, Ge) with C2H4 has been studied at the CCSD(T)/6-311++G(d,p)//MP2/6-311++G(d,p) level. Vibrational analysis and intrinsic reaction coordinate (IRC), calculated at the same level, have been applied to validate the connection of the stationary points. The br...

journal_title：Journal of molecular modeling

authors： Huo S,Li X,Zeng Y,Zheng S,Meng L

更新日期：2013-09-01 00:00:00

abstract：:The present study reports the geometry, electronic structure and properties of neutral and anionic transition metal (TM = Ti, Zr and Hf)) doped germanium clusters containing 1 to 20 germanium atoms within the framework of linear combination of atomic orbitals density functional theory under spin polarized generalized ...

journal_title：Journal of molecular modeling

authors： Kumar M,Bhattacharyya N,Bandyopadhyay D

更新日期：2012-01-01 00:00:00

abstract：:This theoretical study presents a comparative analysis of the molecular properties of heterocyclic (C2H4O...HF and C2H5...HF) and homocyclic (C3H6...HF) hydrogen-bonded complexes. Initially, the equilibrium geometries of these complexes were analyzed in detail at the B3LYP/6-311++G(d,p) level of theory. Subsequently, ...

journal_title：Journal of molecular modeling

authors： Oliveira BG,Araújo RC,Carvalho AB,Ramos MN

更新日期：2009-02-01 00:00:00

abstract：:Theoretical studies on 1H-indole-3-acetic acid (IAA) were performed to investigate the conformational properties of dimeric species and vibrational spectra. Experimental infrared spectra at 100 K and 297 K and Raman spectrum at 297 K were analyzed and compared against calculations performed at B3LYP/6-31G** level. A e...

journal_title：Journal of molecular modeling

authors： Lobayan RM,Schmit MC,Jubert AH,Vitale A

更新日期：2011-06-01 00:00:00

abstract：:The treatment of bacterial infections is currently threatened by the emergence of pathogenic bacteria producing β-lactamase, which catalyzes the hydrolysis of β-lactams. Although the hydrolysis of the substrate nitrocefin by a metallo-β-lactamase, namely β-lactamase N1 from USA300 (a typical methicillin-resistant Stap...

journal_title：Journal of molecular modeling

authors： Yu Y,Wang X,Gao Y,Yang Y,Sun L,Wang G,Deng X,Niu X

更新日期：2019-04-13 00:00:00

abstract：:The work uses MD simulation to study effects of five water contents (3 %, 10 %, 20 %, 50 %, 100 % v/v) on the tetrahedral intermediate of chymotrypsin - trifluoromethyl ketone in polar acetonitrile and non-polar hexane media. The water content induced changes in the structure of the intermediate, solvent distribution ...

journal_title：Journal of molecular modeling

authors： Tian X,Jiang L,Yuan Y,Wang M,Guo Y,Zeng X,Li M,Pu X

更新日期：2013-06-01 00:00:00

abstract：:A first-principles calculation was carried out to investigate the stability and electronic properties of ultra-thin Cx(BN)y heteronanotubes which were composed by joining pure CNT and BNNT segments with different composition and configurations. We found that the stability of Cx(BN)y heteronanotubes is increased with t...

journal_title：Journal of molecular modeling

authors： Wang Y,Huang G,Zhang J,Shao Q

更新日期：2014-08-01 00:00:00

abstract：:Amino acid sequence alignments of the transcriptional regulator AfeR, which is involved in type 1 quorum sensing (QS) in Acidithiobacillus ferrooxidans bacteria, with other acyl homoserine lactone (AHL)-dependent QS regulators, revealed the presence of strictly or highly conserved residues located in the active site o...

journal_title：Journal of molecular modeling

authors： Soulère L,Guiliani N,Queneau Y,Jerez CA,Doutheau A

更新日期：2008-07-01 00:00:00

abstract：:We report the parameterization of AM1 for the elements palladium and silver. The basis sets for both metals contain one set each of s-, p- and d-orbitals. AM1 parameters are now available for H, C, N, O and F (which use the original AM1 parameters), Al, Si, P, S, Cl, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Br, Zr, Mo, Pd, ...

journal_title：Journal of molecular modeling

authors： Kayi H,Clark T

更新日期：2011-10-01 00:00:00

abstract：:We tested different approaches to including the effect of binding-site water molecules for ligand-binding affinities within the MM/GBSA approach (molecular mechanics combined with generalised Born and surface-area solvation). As a test case, we studied the binding of nine phenol analogues to ferritin. The effect of wa...

journal_title：Journal of molecular modeling

authors： Mikulskis P,Genheden S,Ryde U

更新日期：2014-06-01 00:00:00

abstract：:Ergothioneine (2-mercaptohistidine trimethylbetaine) is a very stable natural compound largely present in cells and tissues of plants and mammals. The biological role of ET is still incompletely understood but its antioxidant properties are well assessed experimentally. However, no theoretical study had been performed...

journal_title：Journal of molecular modeling

authors： Lespade L

更新日期：2019-10-26 00:00:00

abstract：:The nuclear magnetic shieldings of Si, Ge, and Sn in MH(4-n) Y(n) (M = Si, Ge, Sn; Y = F, Cl, Br, I and n = 1-4) molecular systems are highly influenced by the substitution of one or more hydrogens by heavy-halogen atoms. We applied the linear response elimination of small components (LRESC) formalism to calculate tho...

journal_title：Journal of molecular modeling

authors： Maldonado AF,Aucar GA,Melo JI

更新日期：2014-09-01 00:00:00

abstract：:In this study, the complete orthonormal sets of phi(alpha)-momentum space orbitals (where alpha = 1, 0, -1, -2, ...) obtained from the psi(alpha)-ETO in coordinate representation (I.I. Guseinov, J. Mol. Model., 9 (2003) 135) are reduced to the complete orthonormal sets of hyperspherical harmonics (HSH) by means of a F...

journal_title：Journal of molecular modeling

authors： Guseinov II

更新日期：2006-09-01 00:00:00

abstract：:A theoretical study of a series of five glucose based glycolipid crown ethers and their complexes with Na(+) and K(+) was performed using the density functional theory with B3LYP/6-31 G* to obtain the optimized geometrical structures and electronic properties. The local nucleophilicity of the five molecules was invest...

journal_title：Journal of molecular modeling

authors： Nguan H,Ahmadi S,Hashim R

更新日期：2012-12-01 00:00:00

abstract：:NBO-NJC decomposition of vicinal (3)J HH spin-spin coupling constants into Lewis, delocalization, and repolarization contributions are presented. A deep study allows to assign the main contributions to specific orbitals or electron delocalizations between two orbitals. (3)J HH torsional dependence and the substituent ...

journal_title：Journal of molecular modeling

authors： García de la Vega JM,San Fabián J

更新日期：2014-07-01 00:00:00

abstract：:The interaction between tetramethylcucurbit[6]uril (host) and 5,5'-dimethyl-2,2'-bipyridyl hydrochloride (guest) was studied by 1H NMR, X-ray crystallography, electronic absorption spectroscopy, fluorescence emission spectra and quantum chemistry calculations. This experimental-computational study that indicated the h...

journal_title：Journal of molecular modeling

authors： Cong H,Zhao YJ,Xue SF,Tao Z,Zhu QJ

更新日期：2007-12-01 00:00:00

abstract：:Two important classes of organic molecules, perylene diimide (PDI) and pyrene derivatives have been found to possess relatively excellent photophysical and photochemical properties and especially high two-photon absorption cross sections (δ(T)(max)). Herein, one-photon absorption (OPA) and two-photon absorption (TPA) ...

journal_title：Journal of molecular modeling

authors： Liu XT,Zhao Y,Ren AM,Feng JK

更新日期：2011-06-01 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

authors： Dehury B,Sahu M,Sahu J,Sarma K,Sen P,Modi MK,Barooah M,Choudhury MD

更新日期：2013-12-01 00:00:00

abstract：:Although molecularly targeted therapy with imatinib has improved treatments of chronic myeloid leukemia (CML), clinical resistance gradually develops in patients with accelerated or blast phase CML. The inability of imatinib to cure CML suggests that inactivation of BCR-ABL kinase activity alone is not sufficient to c...

journal_title：Journal of molecular modeling

authors： Shao S,Yu R,Yu Y,Li Y

更新日期：2014-08-01 00:00:00

abstract：:Quasi-classical trajectory calculations were performed to investigate the stereodynamics of the reaction H(²S) + ClO(²Π) → HO(²Π) + Cl(²P) using the ground-state potential energy surface 1¹A'. The alignment and orientation of the product molecules as well as the four polarization-dependent differential cross-sections ...

journal_title：Journal of molecular modeling

authors： Huang Y

更新日期：2014-03-01 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

authors： Li Y,Barbault F,Delamar M,Zhang R,Hu R

更新日期：2013-04-01 00:00:00