5-Aminolevulinic acid production from inexpensive glucose by engineering the C4 pathway in Escherichia coli

Author:

Ding Wenwen12,Weng Huanjiao12,Du Guocheng12,Chen Jian12,Kang Zhen123

Affiliation:

1. 0000 0001 0708 1323 grid.258151.a The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology Jiangnan University 214122 Wuxi People’s Republic of China

2. 0000 0001 0708 1323 grid.258151.a Synergetic Innovation Center of Food Safety and Nutrition Jiangnan University 214122 Wuxi Jiangsu China

3. 0000 0001 0708 1323 grid.258151.a The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education Jiangnan University 214122 Wuxi People’s Republic of China

Abstract

Abstract 5-Aminolevulinic acid (ALA), the first committed intermediate for natural biosynthesis of tetrapyrrole compounds, has recently drawn intensive attention due to its broad potential applications. In this study, we describe the construction of recombinant Escherichia coli strains for ALA production from glucose via the C4 pathway. The hemA gene from Rhodobacter capsulatus was optimally overexpressed using a ribosome binding site engineering strategy, which enhanced ALA production substantially from 20 to 689 mg/L. Following optimization of biosynthesis pathways towards coenzyme A and precursor (glycine and succinyl-CoA), and downregulation of hemB expression, the production of ALA was further increased to 2.81 g/L in batch-fermentation.

Publisher

Oxford University Press (OUP)

Subject

Applied Microbiology and Biotechnology,Biotechnology,Bioengineering

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