Recombinant escherichia coli with fimA gene knocked out and construction method and application of recombinant escherichia coli

The invention discloses recombinant escherichia coli with a fimA gene knocked out. The fimA gene in the escherichia coli is inactivated. The invention further discloses a construction method of the recombinant escherichia coli with the knocked-out fimA gene. The experimental result shows that the escherichia coli with the knocked-out fimA gene is produced through fermentation, production of L-threonine through fermentation of the escherichia coli is promoted to a certain extent, and the fermentation cycle can be shortened while the yield of the L-threonine is increased. 本发明公开了株敲除fimA基因的重组大肠杆菌，该大肠杆菌中的fimA基因失活，本发明还公开了该敲除fimA基因的重组大肠杆菌的构建方法，实验结果表明发酵产敲除大肠杆菌中fimA基因，对大肠杆菌发酵产L-苏氨酸有定的促进作用，在增加L-苏氨酸的产量的同时可以缩短发酵周期。