Тип публикации: статья из журнала
Год издания: 2009
Идентификатор DOI: 10.1134/S0006297909060157
Ключевые слова: bioluminescence, immobilization, thermostability, luciferase, starch, gelatin, Active reagents, Chemical factors, Comparative studies, Enzyme systems, Gelatin gels, High temperature, Luminous bacteria, NAD(p)H, Optimum pH, Oxidoreductase, Polymer gels, Salt solution, Starch gels, Activation energy, Catalysts, Enzyme immobilization, Gelation, Gels, Light emission, Phosphorescence, Polysaccharides, Enzymes, Bacteria (microorganisms), alkanal monooxygenase (FMN linked), bacterial protein, flavine mononucleotide reductase, immobilized enzyme, article, comparative study, enzyme stability, Escherichia coli, gel, kinetics, metabolism, osmolarity, pH, Photobacterium, temperature, Bacterial Proteins, Enzymes, Immobilized, FMN Reductase, Hydrogen-Ion Concentration, Luciferases, Bacterial, Osmolar Concentration
Аннотация: The properties of a coupled enzyme system (NAD(P)H:FMN-oxidoreductase and luciferase) from luminous bacteria were studied. The enzymes and their substrates were immobilized in polymer gels of different types: starch (polysaccharide) and gelatin (polypeptide). Maximum activity yield (100%) was achieved with the enzymes immobilized in starch gel. An increase in K (m app) was observed in both immobilized systems as compared with the soluble coupled enzyme system. Immobilization in starch and gelatin gels increased the resistance of the NAD(P)H:FMN-oxidoreductase and luciferase coupled enzyme system to the effects of external physical and chemical factors. The optimum pH range expanded both to the acidic and alkaline regions. The resistance to concentrated salt solutions and high temperature also increased. The coupled enzyme system immobilized in starch gel (with activation energy 30 kJ/mol) was characterized by the best thermostability. The immobilized coupled enzyme system can be used to produce a stable and highly active reagent for bioluminescent analysis.
Журнал: Biochemistry (Moscow)
Выпуск журнала: Vol. 74, Is. 6
Номера страниц: 695-700
ISSN журнала: 00062979
Место издания: NEW YORK
Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER
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