Producción de la enzima recombinante Xyn30D de Paenibacillus barcinonensis para la degradación de residuos agroindustriales

Abstract

The purpose of this study was to obtain the recombinant enzyme Xyn30D from Paenibacillus Barcinonensis, which after its expression in E. coli BL21 (DE3) and (TF2) and extraction, its degrading activity on agroindustrial waste was analyzed based on its specific enzyme activity (U/mg protein). Enzymatic activity was measured through the quantification of reducing sugars produced from the digestion of agroindustrial waste after the enzymatic reaction at 50 Celsius degrees and at different time intervals. Cocoa husk was the substrate that showed the highest enzymatic activity (468.3 Units per mg protein) with an incubation time of 15 minutes, followed by cane bagasse, corn stubble and rice bran. Additionally, the enzymatic activity on its optimal substrate (beech wood xylan) was calculated with enzymatic reactions at 15 and 30 minutes, obtaining values of 88.67 and 57.46 Units per mg protein. Finally, the identification of the products generated by the enzymatic reaction of Xyn30D on agroindustrial waste by means of the HPTLC technique, which showed the degradation products obtaining xylobiose and xylooligosaccharides as mentioned in the literature. On the other hand, when analyzing the degradation products of the synergy between Xyn30D and Cel6D, xylobiose, cellobiose, celooligosaccharides and xylooligosaccharides were obtained.