The invention claims to protect
gentamicin sulfate prepared through enhanced microbial
fermentation, and an application method of the
gentamicin sulfate. The enhanced microbial
engineering bacterium is a
Micromonospora purpurea C2 1591 strain which is obtained by screening through a normal-pressure room-temperature
plasma mutagenesis technology, and the
Micromonospora purpurea C2 1591 strain is registered and collected in the China General
Microbiological Culture Collection Center (CGMCC for short, the address is No.3, No.1
Yard, Beichen West Road, Chaoyang District, Beijing) on June 13, 2021, and the collection number is CGMCC No.59450. The screened
engineering bacterium for directionally producing
gentamicin C2 in high yield can directionally produce the gentamicin C2 in the high yield, the component ratio of gentamicin C2 is increased to 85% or above from the original about 15%, and the highest
fermentation titer of an optimized formula is 1184 U / mL through Plackett-Burman design and is increased by 42% than the
titer of an original formula. Compared with an original strain, the yield of the gentamicin C2 is increased by three times, in addition, other isomers or impurities are hardly contained, the gentamicin C2 can be directly applied downstream, complex
biotransformation and purification is not required, a large amount of cost is saved, and an industrialization requirement is met.