The invention discloses
bacillus subtilis capable of producing beta-
amylase and application of the
bacillus subtilis, and belongs to the technical field of bioengineering, the
bacillus subtilis is named as bacillus subtilis JXJY-0811, the bacillus subtilis is preserved in China General
Microbiological Culture Collection Center (CGMCC) on June 7, 2024, and the preservation number is CGMCC NO.30886. The invention further discloses a preparation method of the bacillus subtilis capable of producing beta-
amylase and application of the bacillus subtilis capable of producing beta-
amylase. A strain which can secrete beta-amylase in an
extracellular mode and is high in amylase activity is screened from soil through a transparent ring method, and the strain is identified as bacillus subtilis through
whole genome sequencing. The appropriate temperature condition of the
extracellular beta-amylase of the strain is 50-75 DEG C, the appropriate pH value is 3.5-6.5, the
extracellular enzyme activity is 9640.10 U / mL, and the highest
enzyme activity of the beta-amylase in a 5L
fermentation tank after
fermentation for 60 hours can reach 51980.36 U / mL. The beta-amylase obtained through
fermentation is used for treating a soluble
starch solution, the main product is
maltose, and the beta-amylase can be used for producing
maltose and high
maltose syrup.