Optimization of enzymatic synthesis of l-arabinose ferulate catalyzed by feruloyl esterases from Myceliophthora thermophila in detergentless microemulsions and assessment of its antioxidant and cytotoxicity activities

Sökning: L773:1359 5113 > Optimization of enz...

Validerad;2018;Nivå 2;2018-02-09 (andbra)
The feruloyl esterases FaeA1, FaeA2, FaeB1, FaeB2 from Myceliophthora thermophila C1 and MtFae1a from M. thermophila ATCC 42464 were used as biocatalysts for the transesterification of vinyl ferulate (VFA) with l-arabinose in detergentless microemulsions. The effect of parameters such as the microemulsion composition, the substrate concentration, the enzyme load, the pH, the temperature and the agitation was investigated. FaeA1 offered the highest transesterification yield (52.2 ± 4.3%) after 8 h of incubation at 50 °C using 80 mM VFA, 55 mM l-arabinose and 0.02 mg FAE mL−1 in a mixture comprising of 19.8: 74.7: 5.5 v/v/v n-hexane: t-butanol: 100 mM MOPS-NaOH pH 8.0. The ability of l-arabinose ferulate (AFA) to scavenge 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals was significant (IC50 386.5 μM). AFA was not cytotoxic even at high concentrations (1 mM) however was found to be pro-oxidant at concentrations higher than 20 μM when the antioxidant activity was determined with the dichloro-dihydro-fluorescein diacetate (DCFH-DA) assay in human skin fibroblasts.

Papadopoulou, AdamantiaLaboratory of Cell Proliferation & Ageing, Institute of Biosciences & Applications NCSR “Demokritos”, T. Patriarchou Grigoriou & Neapoleos (författare)
Iancu, LauraDuPont Industrial Biosciences (författare)
Cerullo, GabriellaDepartment of Chemical Sciences, University of Naples "Federico II" (författare)
Ralli, MariannaKorres Natural Products (författare)
Jûtten, PeterTaros Chemicals GmbH & Co (författare)
Piechot, AlexanderTaros Chemicals GmbH & Co (författare)
Faraco, VincenzaDepartment of Chemical Sciences, University of Naples "Federico II" (författare)
Kletsas, DimitrisInstitute of Biosciences and Applications NCSR "Demokritos," Laboratory of Cell Proliferation and Aging (författare)
Rova, UlrikaLuleå tekniska universitet,Kemiteknik(Swepub:ltu)ulrok (författare)
Christakopoulos, PaulLuleå tekniska universitet,Kemiteknik(Swepub:ltu)pauchr (författare)
Luleå tekniska universitetKemiteknik (creator_code:org_t)

Av författaren/redakt...: Antonopoulou, Io; Papadopoulou, Ad ...; Iancu, Laura; Cerullo, Gabriel ...; Ralli, Marianna; Jûtten, Peter; visa fler...; Piechot, Alexand ...; Faraco, Vincenza; Kletsas, Dimitri ...; Rova, Ulrika; Christakopoulos, ...; visa färre...

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