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Catalytic Stability of S-1-(4-Hydroxyphenyl)-Ethanol Dehydrogenase from Aromatoleum aromaticum.
Tataruch, Mateusz; Illeová, Viera; Kluza, Anna; Cabadaj, Patrik; Polakovic, Milan.
Afiliación
  • Tataruch M; Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland.
  • Illeová V; Institute of Chemical and Environmental Engineering, Slovak Technical University, Radlinského 9, 812 37 Bratislava, Slovakia.
  • Kluza A; Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland.
  • Cabadaj P; Institute of Chemical and Environmental Engineering, Slovak Technical University, Radlinského 9, 812 37 Bratislava, Slovakia.
  • Polakovic M; Institute of Chemical and Environmental Engineering, Slovak Technical University, Radlinského 9, 812 37 Bratislava, Slovakia.
Int J Mol Sci ; 25(13)2024 Jul 05.
Article en En | MEDLINE | ID: mdl-39000491
ABSTRACT
Derived from the denitrifying bacterium Aromatoleum aromaticum EbN1 (Azoarcus sp.), the enzyme S-1-(4-hydroxyphenyl)-ethanol dehydrogenase (S-HPED) belongs to the short-chain dehydrogenase/reductase family. Using research techniques like UV-Vis spectroscopy, dynamic light scattering, thermal-shift assay and HPLC, we investigated the catalytic and structural stability of S-HPED over a wide temperature range and within the pH range of 5.5 to 9.0 under storage and reaction conditions. The relationship between aggregation and inactivation of the enzyme in various pH environments was also examined and interpreted. At pH 9.0, where the enzyme exhibited no aggregation, we characterized thermally induced enzyme inactivation. Through isothermal and multitemperature analysis of inactivation data, we identified and confirmed the first-order inactivation mechanism under these pH conditions and determined the kinetic parameters of the inactivation process. Additionally, we report the positive impact of glucose as an enzyme stabilizer, which slows down the dynamics of S-HPED inactivation over a wide range of pH and temperature and limits enzyme aggregation. Besides characterizing the stability of S-HPED, the enzyme's catalytic activity and high stereospecificity for 10 prochiral carbonyl compounds were positively verified, thus expanding the spectrum of substrates reduced by S-HPED. Our research contributes to advancing knowledge about the biocatalytic potential of this catalyst.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estabilidad de Enzimas Idioma: En Revista: Int J Mol Sci Año: 2024 Tipo del documento: Article País de afiliación: Polonia

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estabilidad de Enzimas Idioma: En Revista: Int J Mol Sci Año: 2024 Tipo del documento: Article País de afiliación: Polonia
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