Recombinant microorganism for producing threonine and use thereof

Abstract

Provided are a recombinant microorganism for producing threonine and the use thereof in the fermentation production of threonine or a derivative thereof. A 20-30 bp segment upstream of a start codon of a gene encoding phosphoenolpyruvate carboxylase in the recombinant microorganism is replaced with a strong promoter. By means of the specific optimization of the promoter of the gene encoding phosphoenolpyruvate carboxylase and the mutation of the encoding region of the gene, the ability of the strain to synthesize threonine is significantly improved.

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