Results 161 to 170 of about 4,068 (193)
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Did psychrophilic enzymes really win the challenge?
Extremophiles, 2001Organisms living in permanently cold environments, which actually represent the greatest proportion of our planet, display at low temperatures metabolic fluxes comparable to those exhibited by mesophilic organisms at moderate temperatures. They produce cold-evolved enzymes partially able to cope with the reduction in chemical reaction rates and the ...
Zecchinon, Laurent +11 more
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Psychrophilic Enzymes: Potential Biocatalysts for Food Processing
2019Babu Joseph, Pramod W Ramteke
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Comparative structural analysis of psychrophilic and meso‐ and thermophilic enzymes
Proteins: Structure, Function, and Bioinformatics, 2002AbstractEnzymes adapted to cold display structures comparable with those of their meso‐ and thermophilic homologs but are characterized by a higher catalytic efficiency at low temperatures and by thermolability at moderate temperatures. To identify the structural factors responsible of such features, we undertook a systematic comparative analysis of ...
GIANESE, Giulio +2 more
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Isolation and characterization of psychrophilic yeasts producing cold-adapted pectinolytic enzymes
Letters in Applied Microbiology, 2004The present study was conducted to screen for psychrophilic yeasts that are able to degrade pectin compounds at low temperature, and to examine the cold-active pectinolytic enzymes produced by the isolated psychrophilic yeasts.Psychrophilic yeasts, which grow on pectin as a sole carbon source, pectinolytic-psychrophilic yeast (PPY) strains PPY-3, 4, 5 ...
Noboru Tomizuka
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Canadian Journal of Microbiology, 1968
Proteinase in culture fluids of an obligately psychrophilic bacterium was precipitated by ammonium sulfate and fractionated by gel filtration and DEAE-cellulose chromatography. Three purified fractions (I-1, I-2, and III-1) with proteinase activity were obtained. On the basis of reactions and characteristics (i.e. effect of pH, heat, and metal ions on
Y, Nunokawa, I J, McDonald
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Proteinase in culture fluids of an obligately psychrophilic bacterium was precipitated by ammonium sulfate and fractionated by gel filtration and DEAE-cellulose chromatography. Three purified fractions (I-1, I-2, and III-1) with proteinase activity were obtained. On the basis of reactions and characteristics (i.e. effect of pH, heat, and metal ions on
Y, Nunokawa, I J, McDonald
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Psychrophiles as a novel and promising source of cold-adapted industrial enzymes
The Applied Biology & Chemistry Journal, 2023Psychrophiles are an exclusive group of microbes that thrive in extremely cold environments, such as polar regions and deep-sea. These cold-loving microbes have developed a range of adaptations that enable them to function at low temperatures, including the production of cold-adapted enzymes.
Varsha Gupta +5 more
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Canadian Journal of Microbiology, 1968
The appearance of proteolytic enzymes in culture fluids during growth of an obligately psychrophilic red-pigmented bacterium and of a white variant was followed. Enzymes were precipitated with ammonium sulfate and fractionated on Sephadex G-100. Both organisms produced a slow-moving component (III) at the start of proteinase production and a fast ...
Y, Nunokawa, I J, McDonald
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The appearance of proteolytic enzymes in culture fluids during growth of an obligately psychrophilic red-pigmented bacterium and of a white variant was followed. Enzymes were precipitated with ammonium sulfate and fractionated on Sephadex G-100. Both organisms produced a slow-moving component (III) at the start of proteinase production and a fast ...
Y, Nunokawa, I J, McDonald
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Molecular adaptations of enzymes from psychrophilic organisms
Comparative Biochemistry and Physiology Part A: Physiology, 1997Abstract The dominating adaptative character of enzymes from cold-evolving organisms is their high turnover number (kcat) and catalytic efficiency ( k cat K m ), which compensate for the reduction of chemical reaction rates inherent to low temperatures.
Feller, Georges +3 more
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Applied Biochemistry and Biotechnology
Psychrophilic enzymes are primarily produced by microorganisms from extremely low-temperature environments which are known as psychrophiles. Their high efficiency at low temperatures and easy heat inactivation property have attracted extensive attention from various food and industrial bioprocesses.
Yongqin Liu, Xu Hu, Xu Dawei
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Psychrophilic enzymes are primarily produced by microorganisms from extremely low-temperature environments which are known as psychrophiles. Their high efficiency at low temperatures and easy heat inactivation property have attracted extensive attention from various food and industrial bioprocesses.
Yongqin Liu, Xu Hu, Xu Dawei
exaly +3 more sources
Thermolability of glycolysis enzymes from a psychrophilic marine bacterium
Journal of Oceanography, 1977Cell extracts ofVibrio marinus MP-1 grown at 15°C and suspended in either tris-HCl buffer or NaCl were compared for heat lability of hexokinase, glucose phosphate isomerase, and aldolase. In tris buffer glucose phosphate isomerase and aldolase lost 50 per cent activity after one hour at low thermal exposures of 34°C and 28°C, respectively.
Richard Y. Morita, Paul F. Mathemeier
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