RT Journal Article T1 Overcoming biochemical limitations of galactose oxidase through the design of a solid-supported self-sufficient biocatalyst A1 Lorente-Arevalo, Alvaro A1 Orellana Moraleda, Guillermo A1 Laderi, Miguel A1 Bolívar Bolívar, Juan Manuel AB Galactose Oxidase (GalOx) has gained significant interest in biocatalysis due to its ability for selective oxidation beyond the natural oxidation of galactose, enabling the production of valuable derivatives. However, the practical application of GalOx has been hindered by the limited availability of active and stable biocatalysts, as well as the inherent biochemical limitations such as oxygen (O2) dependency and the need for activation. In this study, we addressed these challenges by immobilizing GalOx into agarose-based and Purolite supports to enhance its activity and stability. Additionally, we identified and quantified the oxygen supply limitation into solid catalysts by intraparticle oxygen sensing showing a trade-off between the amount of protein loaded onto the solid support and the catalytic effectiveness of the immobilized enzyme. Furthermore, we coimmobilized a heme-containing protein along with the enzyme to function as an activator. To evaluate the practical application of the immobilized GalOx, we conducted the oxidation of galactose in an instrumented aerated reactor. The results showcased the efficient performance of the immobilized enzyme in the 8 h reaction cycle. Notably, the GalOx immobilized into dextran sulfate-activated agarose exhibited improved stability, overcoming the need for a soluble activator supply, and demonstrated exceptional performance in galactose oxidation. These findings offer promising prospects for the utilization of GalOx in technical biocatalytic applications. PB Wiley-VCH GmbH SN 1439-4227 YR 2023 FD 2023 LK https://hdl.handle.net/20.500.14352/88993 UL https://hdl.handle.net/20.500.14352/88993 LA eng NO Lorente-Arevalo A, Orellana G, Ladero M, Bolivar JM. Overcoming biochemical limitations of galactose oxidase through the design of a solid-supported self-sufficient biocatalyst. Chembiochem. 2023 Oct 2:e202300421. doi: 10.1002/cbic.202300421. Epub ahead of print. PMID: 37782555. NO Comunidad de Madrid NO European Commission NO Ministerio de Ciencia e Innovación (España) DS Docta Complutense RD 5 abr 2025