The invention discloses a
novel gene expression
plasmid pTAEP2 capable of realizing efficient and stable overexpression in
brevibacillus laterosporus (
Brevibacillus laterosporus), and a preparation method of the
novel gene expression
plasmid pTAEP2 capable of realizing efficient and stable overexpression in
brevibacillus laterosporus. The
plasmid contains a
toxin-
antitoxin system gene cassette, so that the plasmid can stably exist in a specific non-mode host; the P2
promoter can drive high-level expression of a
target gene; the RepF
replicon is contained, so that the plasmid can be effectively replicated in a non-mode host; the composition contains
ampicillin antibiotics and
erythromycin which are used as selection markers. The invention also provides a method for
target protein expression by transforming specific non-mode
brevibacillus laterosporus with the pTAEP2 plasmid, the plasmid contains a TraJ element, so that the plasmid is efficiently introduced into a non-mode
microbial host including
brevibacillus laterosporus in a conjugational transfer manner, the
gene introduction process is greatly simplified, and the production cost is reduced. And stable and high expression of a
target gene is realized. The invention provides a powerful molecular biological tool for developing efficient and
stable gene overexpression research and industrial application, and is beneficial to efficient
gene manipulation in the non-model
bacteria.