Abstract:
This study aims to prepare polysaccharide hydrolysates and their filtrates from Pleurotus sajor-caju (Fr.) Singer by the enzymatic method. The crude polysaccharides were extracted using hot water extraction, with the highest yield obtained at 5.76 ± 0.15% w/w and β-glucan content of 17.19 ± 2.8 % w/w. The crude polysaccharides were then hydrolyzed using endo-1,3-β-D-glucanase at various enzyme concentrations of 10, 20, and 30 units. The results showed that the enzyme unit had no effect on the yields of polysaccharide hydrolysates and their filtrates, which ranged between 16.67±2.8 % and 18.67±1.15 % (w/w), and 66.83±4.6 % and 68.33±3.30% (w/w), respectively. The results showed that the values of total carbohydrate content (TCC) and reducing sugar content were significantly decreased after enzymatic hydrolysis (p<0.05). Thin-layer chromatography revealed that the large-sized molecules were present in the polysaccharide hydrolysates, while the polysaccharide hydrolysate filtrates possessed lower molecular size compounds. However, antioxidant capacity assayed by ABTS-radical scavenging activity was 2-fold decreased when the polysaccharides were hydrolyzed. Therefore, other bioactive constituents and their biological activities of polysaccharide hydrolysates could be conducted to support their potential utilization in cosmetics.