期刊
APPLIED CATALYSIS A-GENERAL
卷 585, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcata.2019.117187
关键词
Trimethyl-epsilon-caprolactone; Baeyer-Villiger monooxygenase; Cofactor regeneration; Re-cycling; Immobilized enzymes; Biocatalyst yield
资金
- European Union project ROBOX under EU's Horizon 2020 Programme Research and Innovation actions H2020-LEIT BIO-2014-1 [635734]
- UAB
- COST Action -Systems Biocatalysis [CM 1303]
An often associated drawback with Baeyer-Villiger monooxygenases, is its poor operational stability. Furthermore, these biocatalysts frequently suffer from substrate/product inhibition. In this work, a thermostable cyclohexanone monooxygenase (TmCHMO) was immobilized and used in the synthesis of trimethyl-epsilon-caprolactone (CHL). As a cofactor regeneration enzyme, a novel and highly active glucose dehydrogenase (GDH-01) was used immobilized for the first time. MANA-agarose was the carrier chosen since it presented an immobilization yield of 76.3 +/- 0.7% and a retained activity of 62.6 +/- 2.3%, the highest metrics among the supports tested. Both immobilized enzymes were studied either separately or together in six reaction cycles (30 mL; [substrate] = 132.5 mM). A biocatalyst yield of 37.3 g g(-1) of TmCHMO and 474.2 g g(-1) of GDH-01 were obtained. These values represent a 3.6-fold and 1.9-fold increase respectively, compared with a model reaction where both enzymes were used in its soluble form.
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