Enzymatic Characterization of Xylanase TgXyn2

Objectives: This study aimed to discover a acidic xylanase TgXyn2 with high enzymatic activities at low temperatures, which might have potential application in food industry. Method: TgXyn2 was heterologously expressed in E.coli with the expression vector pCold-TF. Results: The optimum reaction condition of TgXyn2 was 35 ℃ and pH5.0, respectively. Its Km was 1.287 μmol L−1 and Vmax was 2.083 μmol min−1 mg−1. Homology modeling showed that TgXyn2 had two antiparallel β-sheets and an α-helix, which was typical for the GH11 family. Conclusions: TgXyn2 had good enzymatic activities, which has potential application in food industry.