Mechanism of the Reaction between Cyanocobalamin and Reduced Flavin Mononucleotide

2021 ◽  
Vol 95 (10) ◽  
pp. 2020-2024
Author(s):  
I. A. Dereven’kov ◽  
K. A. Ugodin ◽  
S. V. Makarov
Keyword(s):  
Flavin Mononucleotide ◽  
Mechanism Of The Reaction

Acetolysis of 4β-methanesulphonyloxy-6β,7aβ-cyclo-B-homo-5α-cholestane

1979 ◽  
Vol 44 (11) ◽  
pp. 3308-3320 ◽  
Author(s):  
Ladislav Kohout ◽  
Jan Fajkoš
Keyword(s):  
Mechanism Of The Reaction

Synthesis of 4β-methanesulphonyloxy-6β,7aβ-cyclo-B-homo-5α-cholestane is described. During its acetolysis a kind of conjugative stabilization of the carbocation formed was observed. The mechanism of the reaction is discussed.

Kinetics and mechanism of the reaction of iron(III) with 6-methyl-2,4-heptanedione and 3,5-heptanedione

1990 ◽  
Vol 55 (8) ◽  
pp. 1984-1990 ◽  
Author(s):  
José M. Hernando ◽  
Olimpio Montero ◽  
Carlos Blanco
Keyword(s):  
Aqueous Solution ◽  
Metal Ion ◽  
Activation Parameters ◽  
Enol Form ◽  
Kinetics And Mechanism ◽  
Kinetic Constants ◽  
Steric Factors ◽  
Kinetics Of ◽  
Mechanism Of The Reaction

The kinetics of the reactions of iron(III) with 6-methyl-2,4-heptanedione and 3,5-heptanedione to form the corresponding monocomplexes have been studied spectrophotometrically in the range 5 °C to 16 °C at I 25 mol l-1 in aqueous solution. In the proposed mechanism for the two complexes, the enol form reacts with the metal ion by parallel acid-independent and inverse-acid paths. The kinetic constants for both pathways have been calculated at five temperatures. Activation parameters have also been calculated. The results are consistent with an associative activation for Fe(H2O)63+ and dissociative activation for Fe(H2O)5(OH)2+. The differences in the results for the complexes of heptanediones studied are interpreted in terms of steric factors.

Kinetics and mechanism of the reaction between oxidized cytochrome c and ascorbic acid

1991 ◽  
Vol 56 (2) ◽  
pp. 478-490 ◽  
Author(s):  
Joaquin F. Perez-Benito ◽  
Conchita Arias
Keyword(s):  
Ascorbic Acid ◽  
Cytochrome C ◽  
Redox Reactions ◽  
Arrhenius Equation ◽  
Horse Heart Cytochrome ◽  
First Order ◽  
Acidic Form ◽  
Ph Range ◽  
Horse Heart Cytochrome C ◽  
Mechanism Of The Reaction

The reaction between horse-heart cytochrome c and ascorbic acid has been investigated in the pH range 5.5 – 7.1 and at 10.0 – 25.0 °C. The rate shows a first-order dependence on the concentration of cytochrome c, it increases in a non-linear way as the concentration of ascorbic acid increases, it increases markedly with increasing pH and, provided that the ionic strength of the medium is high enough, it fulfills the Arrhenius equation. The apparent activation energy increases as the pH of the solution increases. The results have been explained by means of a mechanism that includes the existence of an equilibrium between two forms (acidic and basic) of oxidized cytochrome c: cyt-H+ -Fe3+ + OH- cyt -Fe3+ + H2O, whose equilibrium constant is (6.7 ± 1.4). 108 at 25.0 °C, the acidic form being more reducible than the basic one. It is suggested that there is a linkage of hydrogenascorbate ion to both forms of cytochrome c previous to the redox reactions. Two possibilities for the oxidant-reductant linkage (binding and adsorption) are discussed in detail.

Absorption Spectrum of Flavin Mononucleotide Semiquinone

1963 ◽  
Vol 53 (2) ◽  
pp. 143-146 ◽  
Author(s):  
SATOSHI NAKAMURA ◽  
TAKAO NAKAMURA ◽  
YASUYUKI OGURA
Keyword(s):  
Absorption Spectrum ◽  
Flavin Mononucleotide

Structural Characterization of HP1264 Reveals a Novel Fold for the Flavin Mononucleotide Binding Protein

Biochemistry ◽  
2013 ◽  
Vol 52 (9) ◽  
pp. 1583-1593 ◽  
Author(s):  
Ki-Young Lee ◽  
Ji-Hun Kim ◽  
Kyu-Yeon Lee ◽  
Jiyun Lee ◽  
Ingyun Lee ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Binding Protein ◽  
Flavin Mononucleotide

scholarly journals ON THE MECHANISM OF THE REACTION OF NINHYDRIN WITH α-AMINO ACIDS

1950 ◽  
Vol 186 (1) ◽  
pp. 13-22
Author(s):  
Douglas A. MacFadyen ◽  
Nathalie. Fowler
Keyword(s):  
Amino Acids ◽  
Mechanism Of The Reaction

scholarly journals Intermediates in the Bioluminescent Oxidation of Reduced Flavin Mononucleotide

1963 ◽  
Vol 238 (7) ◽  
pp. 2537-2554 ◽  
Author(s):  
J. Woodland Hastings ◽  
Quentin H. Gibson
Keyword(s):  
Flavin Mononucleotide

Chemical reduction of chlorpyrifos driven by flavin mononucleotide functionalized titanium (IV) dioxide

2020 ◽  
Vol 5 (11) ◽  
Author(s):  
Stephanie Santos Díaz ◽  
Hazim Al-Zubaidi ◽  
Amir C. Ross-Obare ◽  
Sherine O. Obare
Keyword(s):  
Functional Groups ◽  
Organic Contaminants ◽  
Chemical Reduction ◽  
Flavin Mononucleotide ◽  
Reaction Conditions ◽  
Organophosphate Compounds ◽  
Biological Molecule ◽  
Highly Active ◽  
New Directions ◽  
Detrimental Impact

AbstractFor many decades, organohalide and organophosphate compounds have shown significant detrimental impact on the environment. Consequently, strategies for their remediation continue to be an area of emerging need. The reduction of the chlorpyrifos pesticide, a molecule that bears both organohalide and organophosphate functional groups, is an important area of investigation due to it toxic nature. In this report, we demonstrate the effectiveness of the biological molecule, flavin mononucleotide (FMN) toward chemically reducing chlorpyrifos. The FMN was found to be highly active when anchored to nanocrystalline TiO2 surfaces. The results show new directions toward the remediation of organic contaminants under mild reaction conditions.

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