isoleucine/cárie dentária

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Crystal structure of the novel amino-acid racemase isoleucine 2-epimerase from Lactobacillus buchneri.

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Crystal structures of Lactobacillus buchneri isoleucine 2-epimerase, a novel branched-chain amino-acid racemase, were determined for the enzyme in the apo form, in complex with pyridoxal 5'-phosphate (PLP), in complex with N-(5'-phosphopyridoxyl)-L-isoleucine (PLP-L-Ile) and in complex with

P53 Gene Mutation Identified by Next Generation Sequencing in Poorly Differentiated Neuroendocrine Carcinoma of the Nasal Cavity.

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Neuroendocrine carcinomas (NECs) are epithelial neoplasms showing morphologic, immunophenotypic or ultrastructural evidence of neuroendocrine differentiation. The 2017 WHO Classification of Head and Neck Tumours classifies NECs into well, moderately and poorly differentiated NECs according to light

Changes in activity levels and isozyme patterns of isoleucine aminotransferase in response to experimentally induced hepatic lesion.

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Branched-chain amino acid aminotransferase activities were measured in rats in which hepatic lesions were induced experimentally, that is, fatty liver produced by an orotic acid-containing diet and acute hepatic lesion induced by D-galactosamine injection into the abdominal cavity. The levels of the

Shape and energetics of a cavity in c-Myb probed by natural and non-natural amino acid mutations.

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The shape and the energetics of a functional cavity in the R2 subdomain (90-141) of the c-Myb DNA-binding domain were investigated by spectroscopy and thermodynamic analysis. We focused on the valine 103 residue located in front of the cavity. Nine mutants, in which valine 103 was substituted with

Vaginal metabolome: towards a minimally invasive diagnosis of microbial invasion of the amniotic cavity in women with preterm labor.

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Microbial invasion of the amniotic cavity (MIAC) is only identified by amniocentesis, an invasive procedure that limits its clinical translation. Here, we aimed to evaluate whether the vaginal metabolome discriminates the presence/absence of MIAC in women with preterm labor (PTL) and intact

Stabilization and enhanced enzymatic activities of a mutant human lysozyme C77/95A with a cavity space by amino acid substitution.

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Amino acid substitutions were examined to increase the stability of the mutant human lysozyme C77/95A by filling the cavity created by this mutation. To modulate the cavity with hydrophobic amino acids or by the formation of a hydrogen bond, five amino acid-substituted mutants, C77AC95L, C77AC95I,

QM and QM/MM studies of uranyl fluorides in the gas and aqueous phases and in the hydrophobic cavities of tetrabrachion.

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The structural properties and electronic structures of pentacoordinated uranyl complexes belonging to the [UO(2)F(n)(H(2)O)(5-n)](2-n) series have been studied in the gas and aqueous phases using density functionals with relativistic pseudopotentials and all-electron basis sets in the gas-phase

Molecular dynamics simulations of isoleucine-release pathway in GAF domain of N-CodY from Bacillus Subtilis.

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The GAF domain located in the N-terminal motifs of CodY (N-CodY) is responsible for increasing the affinity of CodY to its target sites on DNA by its interaction with the branched chain amino acids (BCAAs) involving isoleucine, leucine and valine. The study of the interaction of GAF domain with

Structural and energetic consequences of mutations in a solvated hydrophobic cavity.

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The structural and energetic consequences of modifications to the hydrophobic cavity of interleukin 1-beta (IL-1beta) are described. Previous reports demonstrated that the entirely hydrophobic cavity of IL-1beta contains positionally disordered water. To gain a better understanding of the nature of

Connected cavity structure enables prenyl elongation across the dimer interface in mutated geranylfarnesyl diphosphate synthase from Methanosarcina mazei.

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The mechanism for product chain-length determination of geranylfarnesyl diphosphate synthase from the methanogenic archaeon Methanosarcina mazei was investigated by constructing mutants based on structural information. Among the mutants, in which each of the bulky residues that constitute the bottom

A tyrosine substitution in the cavity wall of a k channel induces an inverted inactivation.

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Ion permeation and gating kinetics of voltage-gated K channels critically depend on the amino-acid composition of the cavity wall. Residue 470 in the Shaker K channel is an isoleucine, making the cavity volume in a closed channel insufficiently large for a hydrated K(+) ion. In the cardiac human

Critical roles of isoleucine-364 and adjacent residues in a hydrophobic gate control of phospholipid transport by the mammalian P4-ATPase ATP8A2.

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P4-ATPases (flippases) translocate specific phospholipids such as phosphatidylserine from the exoplasmic leaflet of the cell membrane to the cytosolic leaflet, upholding an essential membrane asymmetry. The mechanism of flipping this giant substrate has remained an enigma. We have investigated the

Molecular Simulation of the Separation of Isoleucine Enantiomers by β-Cyclodextrin.

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Molecular mechanics and dynamics simulations were carried out to study the capacity of isoleucine enantiomers to form inclusion complexes with β⁻cyclodextrin, and to be discriminated by this chiral compound, in vacuo and with different solvents. Solvents were characterized not only by the value of

Contribution of hydrophobic residues to the stability of human lysozyme: calorimetric studies and X-ray structural analysis of the five isoleucine to valine mutants.

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In order to understand the contribution of hydrophobic residues to the conformational stability of human lysozyme, five Ile mutants (Ile --> Val) in the interior of the protein were constructed. The thermodynamic parameters characterizing the denaturation of these mutant proteins were determined by

Demonstration of isoleucine 199 as a structural determinant for the selective inhibition of human monoamine oxidase B by specific reversible inhibitors.

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Several reversible inhibitors selective for human monoamine oxidase B (MAO B) that do not inhibit MAO A have been described in the literature. The following compounds: 8-(3-chlorostyryl)caffeine, 1,4-diphenyl-2-butene, and trans,trans-farnesol are shown to inhibit competitively human, horse, rat,

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