Exiguobacterium acetylbacter YD37, and low-temperature protease and biological enzyme produced by Exiguobacterium acetylbacter YD37

The invention provides an Exiguobacterium aceticum YD37 for producing low-temperature protease and application of the Exiguobacterium aceticum YD37. The classification name of the Exiguobacterium aceticum YD37 is Exiguobacterium aceticum, the preservation number of the Exiguobacterium aceticum YD37 is CGMCC (China General Microbiological Culture Collection Center) No.25293, and the bacterial colony of the Exiguobacterium aceticum YD37 is yellow, opaque, round, regular in edge and smooth in surface. Gram-positive bacteria have two forms, namely a short rod shape and a spherical shape, the size of the bacteria is about 0.5-1.5 microns, and flagellum exists. The optimum action temperature of the protease is 35-37 DEG C, the optimum pH is 6.0-7.0, and the enzyme activity can be adjusted through metal ions. 本发明提供了一株产低温蛋白酶的乙酰微小杆菌YD37及其应用。所述乙酰微小杆菌YD37的分类命名为乙酰微小杆菌Exiguobacterium acetylicum，保藏编号为CGMCC No.25293，其菌落为呈黄色、不透明、圆形、边缘规则、表面光滑。革兰氏阳性细菌，有短杆状和球状两种形态，菌体大小约0.5～1.5μm，有鞭毛。该蛋白酶的最适作用温度为35℃-37℃，最适pH为6.0-7.0，并能够通过金属离子调节酶