scholarly journals Lipopolysaccharide Is a 4-Aminoarabinose Donor to Exogenous Polyisoprenyl Phosphates through the Reverse Reaction of the Enzyme ArnT

ACS Omega ◽  
2021 ◽  
Vol 6 (39) ◽  
pp. 25729-25741
Author(s):  
Beth A. Scarbrough ◽  
Colleen R. Eade ◽  
Amanda J. Reid ◽  
Tiffany C. Williams ◽  
Jerry M. Troutman
Keyword(s):  
Reverse Reaction

scholarly journals The kinetics of hœmoglobin VI -The competition of carbon monoxide and oxygen for hœmoglobin

1934 ◽  
Vol 115 (795) ◽  
pp. 473-495 ◽  
Keyword(s):  
Carbon Monoxide ◽  
Reverse Reaction ◽  
Experimental Part ◽  
Kinetics Of ◽  
Broad Outline

The experimental part of the research to be described below is given in two main sections. Of these Section 1 deals with the results obtained in measurements of the rate of displacement of oxygen from combination with hœmoglobin by carbon monoxide. Section 2 gives, in corresponding fashion, the results for the reverse reaction, namely, the displacement of carbon monoxide from combination with hœmoglobin by oxygen. The theoretical aspects of theses two reactions have already been dealt with in broad outline at the end of Part IV, with which it will be assumed that the reader is fully acquainted. Some further considerations, however, arise and these are given in Section 3 of the present paper.

scholarly journals A Unique GTP-Dependent Sporulation Sensor Histidine Kinase in Bacillus anthracis

2008 ◽  
Vol 191 (3) ◽  
pp. 687-692 ◽  
Author(s):  
Francesca Scaramozzino ◽  
Andrea White ◽  
Marta Perego ◽  
James A. Hoch
Keyword(s):  
Bacillus Anthracis ◽  
Histidine Kinase ◽  
Catalytic Domain ◽  
Coiled Coil ◽  
Reverse Reaction ◽  
Forward Reaction ◽  
Critical Signal ◽  
Sensor Histidine Kinase ◽  
Virulence Plasmids ◽  
Kinase Catalytic Domain

ABSTRACT The Bacillus anthracis BA2291 gene codes for a sensor histidine kinase involved in the induction of sporulation. Genes for orthologs of the sensor domain of the BA2291 kinase exist in virulence plasmids in this organism, and these proteins, when expressed, inhibit sporulation by converting BA2291 to an apparent phosphatase of the sporulation phosphorelay. Evidence suggests that the sensor domains inhibit BA2291 by titrating its activating signal ligand. Studies with purified BA2291 revealed that this kinase is uniquely specific for GTP in the forward reaction and GDP in the reverse reaction. The G1 motif of BA2291 is highly modified from ATP-specific histidine kinases, and modeling this motif in the structure of the kinase catalytic domain suggested how guanine binds to the region. A mutation in the putative coiled-coil linker between the sensor domain and the catalytic domains was found to decrease the rate of the forward autophosphorylation reaction and not affect the reverse reaction from phosphorylated Spo0F. The results suggest that the activating ligand for BA2291 is a critical signal for sporulation and in a limited concentration in the cell. Decreasing the response to it either by slowing the forward reaction through mutation or by titration of the ligand by expressing the plasmid-encoded sensor domains switches BA2291 from an inducer to an inhibitor of the phosphorelay and sporulation.

Kinetics of the diels-alder addition of ethene to cyclohexa-1,3-diene and its reverse reaction in the gas phase

1980 ◽  
Vol 12 (4) ◽  
pp. 253-259 ◽  
Author(s):  
G. Huybrechts ◽  
D. Rigaux ◽  
J. Vankeerberghen ◽  
B. Van Mele
Keyword(s):  
Gas Phase ◽  
Diels Alder ◽  
Reverse Reaction ◽  
Kinetics Of

scholarly journals An Analysis of the Reverse Reaction Phenomena in Shifting Human Body Weight

1982 ◽  
Vol 18 (5) ◽  
pp. 520-526 ◽  
Author(s):  
Noboru OHNISHI ◽  
Kazuo TSUCHIYA ◽  
Koji ITO ◽  
Masami ITO
Keyword(s):  
Body Weight ◽  
Human Body ◽  
Reverse Reaction

Production of Branched Cyclodextrins by Reverse Reaction of Microbial Debranching Enzymes

1997 ◽  
Vol 49 (2) ◽  
pp. 75-78 ◽  
Author(s):  
Dong K. Yim ◽  
Yong H. Park ◽  
Yong H. Park
Keyword(s):  
Reverse Reaction ◽  
Debranching Enzymes

Methylation of Phenolic Hydroxyl Group and Demethylation of Anisoles

2009 ◽  
Vol 2009 (4) ◽  
pp. 229-230 ◽  
Author(s):  
Nobuhiro Sato ◽  
Hiroyuki Endo
Keyword(s):  
Microwave Heating ◽  
Room Temperature ◽  
Reverse Reaction ◽  
Phenolic Hydroxyl ◽  
Hydroxyl Group ◽  
Hydroxyl Groups ◽  
Phenolic Hydroxyl Groups ◽  
Phenyl Ethers ◽  
Methyl Phenyl

A mild methylation of phenolic hydroxyl groups with iodomethane was enabled in the presence of sodium bis(trimethylsilyl)amide at room temperature. The reverse reaction, namely demethylation of methyl phenyl ethers, was easily achieved by microwave heating with neat iodotrimethylsilane.

Mechanism of Carbothermic Reduction of Magnesia and Reverse Reaction

2012 ◽  
pp. 511-516
Author(s):  
Yang Tian ◽  
Tao Qu ◽  
Bin Yang ◽  
Hong-xiang Liu ◽  
Cheng-bo Yang ◽  
...  
Keyword(s):  
Carbothermic Reduction ◽  
Reverse Reaction

Model Studies on Flavin-Dependent Carbonyl-Activation: Reduction of Carbonyl Compounds by Flavohydroquinone

1972 ◽  
Vol 27 (9) ◽  
pp. 1038-1040 ◽  
Author(s):  
G. Blankenhorn ◽  
S. Ghisla ◽  
P. Hemmerich
Keyword(s):  
Redox Reaction ◽  
Carbonyl Compounds ◽  
Reverse Reaction ◽  
Intermediate Species ◽  
Model Studies

The reduction of aldehydes by flavohydroquinone to yield the corresponding alcohols and flavoquinone is reported and discussed in view of its relevance to the mechanism of flavin-dependent dehydrogenation and carbonyl activation. With formaldehyde and flavohydroquinone formation of a covalent 5- (HO - CH2) Flred⁻ intermediate species is observed. In a reverse reaction 5-methylflavoquinonium cation undergoes an internal redox reaction to yield flavohydroquinone and formaldehyde.

Reactions of trifluoromethyl radicals. I. Hydrogen abstraction from dimethyl sulphide

1972 ◽  
Vol 25 (4) ◽  
pp. 803 ◽  
Author(s):  
NL Arthur ◽  
KS Yeo
Keyword(s):  
Hydrogen Atom ◽  
Rate Constant ◽  
Hydrogen Abstraction ◽  
Reverse Reaction ◽  
Thermochemical Data ◽  
Hydrogen Atom Abstraction ◽  
Dimethyl Sulphide ◽  
Temperature Range

Hydrogen atom abstraction from (CH3)2S by CF3 radicals has been studied in the temperature range 79-167�: (1) CF3 + CH3SCH3 ←→ CF3H + CH3SCH2 (-1) The rate constant, based on Ayscough's value of 1013.36cmS mol-l s-l for the recombination of CF3 radicals, is given by (k1 in cm3 mol-1 s-l, E in J mol-l): Logk1 = (12.05 � 0.02)-(28710 � 130)/2.303RT Combination of these results with thermochemical data gives a calculated value of log k-1 = 12.2 - 62600/2.303RT for the rate constant of the reverse reaction. ΔH�f(CH3SCH2) and S�(CH3SCH2) are estimated to be 155.6 kJ mol-l and 290 J K-l mol-1 respectively.

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