Abstract
Adipic acid is an important monomer in the synthesis of nylon-6,6. In recent years, the biosynthesis of adipic acid has received more and more attention. The pathway with l-lysine as a precursor has potential for adipic acid synthesis, and 2-hydroxyadipate is a key intermediate metabolite in this pathway. In this Letter, the biosynthesis pathway of 2-hydroxyadipate was constructed in Escherichia coli. Through enhancement of precursor synthesis and cofactors regulation, 7.11 g/L of 2-hydroxyadipate was produced in the 5 L bioreactor, which verified the scale-up potential of 2-hydroxyadipate production. Furthermore, 11.1 g/L of 2-hydroxyadipate was produced in the 5 L bioreactor on the basis of potential optimization strategies via transcriptome analysis. This is the first time for the biosynthesis of 2-hydroxyadipate. The results lay a solid foundation for the biosynthesis of adipic acid and the production of bionylon.
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