Results 151 to 160 of about 1,413 (192)
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Streptococcus mutans Dextransucrase: A Review
1978Publisher Summary Two factors contribute to the cariogenic potential of Streptococcus mutans ( S. mutuns). These factors include its ability to produce high yields of lactic acid from a variety of carbon sources and its ability to adhere to hard surfaces by the action of its extracellular polysaccharides. S.
T J, Montville +2 more
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The hydrolysis of sucrose by dextransucrase
Carbohydrate Research, 1983Abstract Dextransucrase was shown to catalyze the hydrolysis of sucrose. The hydrolytic activity was found to be directly correlatable with dextransucrase activity on poly-(acrylamide) disc-gel electrophoresis. In studies on the hydrolysis of sucrose and formation of dextran as a function of time and substrate concentration, the two activities were ...
Gary A. Luzio, Robert M. Mayer
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Production of Leucrose by Dextransucrase
Starch - Stärke, 1998Dextransucrase can be used to synthesize the disaccharide leucrose from sucrose and fructose under appropriate reaction conditions. HPLC methods to analyze the reaction solutions and an enzyme activity test were developed to determine reaction kinetics and by-products in detail. As a result, a separate acceptor binding site at the enzyme was postulated
Klaus Buchholz +2 more
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Dextransucrase: Studies on donor substrate specificity
Archives of Biochemistry and Biophysics, 1981Abstract Previous studies (D. S. Genghoff and E. J. Hehre, Proc. Soc. Exp. Biol. Med., 1972, 140, 1298–1301) have shown that an α-linked fluorine atom at C-1 of glucose provided sufficient activation to permit this analog to be a donor substrate for dextransucrase. In order to study the specificity at the donor substrate binding site, a series of α-1-
T J, Grier, R M, Mayer
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Kinetics of Leucrose Formation From Sucrose by Dextransucrase
Biotechnology and Bioengineering, 1994AbstractLeucrose formation from sucrose and fructose by dextransucrase is of practical interest. It has been investigated at different experimental conditions, including the influence of temperature on reaction rate and selectivity. Under appropriate conditions high product yield can be obtained.
Klaus Buchholz +2 more
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TEMPERATURE-SENSITIVE DEXTRANSUCRASE SYNTHESIS BY A LACTOBACILLUS
Journal of Bacteriology, 1963Dunican , L. K. (Cornell University, Ithaca, New York), and H. W. Seeley, Jr. Temperature-sensitive dextransucrase synthesis by a lactobacillus. J. Bacteriol. 86: 1079–1083.
L K, DUNICAN, H W, SEELEY
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High pressure enzyme kinetics of dextransucrase
Biophysical Chemistry, 1976The pressure dependence of enzymatic dextran formation has been observed up to 1000 at for several substrate concentrations. First order denaturation effects could be separated from the thermodynamic effects, which lead to a volume of 30.4 to 44.0 ccm per mole for the formation and -13.6ccm per mole for the activation of the enzyme-substrate complex ...
K O, Greulich, H, Ludwig
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Inhibition of Dextransucrase by Excess Substrate
Nature, 1958HEHRE1, working with the enzyme dextransucrase, showed that a plot of initial velocity v against substrate concentration deviated from linearity above a sucrose concentration of 200 mM. This was tentatively explained on the basis of a decrease in concentration of water in the stronger sucrose solutions.
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Regulation of Dextransucrase Formation by Streptococcus sanguis
Caries Research, 2009The dextransucrase formation by Streptococcus sanguis, strain 804, was studied under standardized and reproducible conditions in continuous culture. At state growth in complex medium the enzyme activity was high at low dilution rates and decreased when the dilution rate increased. At steady-state growth in chemically defined medium, the enzyme activity
J, Carlsson, B, Elander
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Immobilization of dextransucrase on functionalized TiO2 supports
International Journal of Biological Macromolecules, 2018The TiO2 based hybrid supports with different functional groups (amino, glutaraldehyde or epoxy) were prepared and their influence on immobilization of dextransucrase (DS) was studied. Novel synthetic route for surface modification of TiO2 with amino and glutaraldehyde groups was developed taking advantage of charge transfer complex (CTC) formation ...
Miljković, Miona G. +8 more
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