Unlocking Industrial Potential: Phase-Transition Coimmobilization of Multienzyme Systems for High-Efficiency Uridine Diphosphate Galactose Production.

ABSTRACT

Transitioning from batch to continuous industrial production often improves the economic returns and production efficiency. Immobilization is a critical strategy that can facilitate this shift. This study refined the previously established method for synthesizing uridine diphosphate galactose (UDP-Gal) by employing thermophilic enzymes. Three thermophilic enzymes (galactokinase, uridine diphosphate glucose pyrophosphorylase, and inorganic pyrophosphatase) were coimmobilized on the pH-responsive carrier Eudragit S-100, promoting enzyme recovery and reuse while their industrial potential was assessed. The coimmobilization system efficiently catalyzed UDP-Gal production, yielding 13.69 mM in 1.5 h, attaining a UTP conversion rate of 91.2% and a space-time yield (STY) of 5.16 g/L/h. Moreover, the system exhibited exceptional reproducibility, retaining 58.9% of its initial activity after five cycles. This research highlighted promising prospects for coimmobilization in industrial synthesis and proposed a novel methodology for enhancing UDP-Gal production in the industry. In addition, the phase-transition property of Eudragit S-100 paves the way for further exploration with the one-pot synthesis of poorly soluble galactosides.