期刊
ACS SYNTHETIC BIOLOGY
卷 8, 期 2, 页码 371-380出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssynbio.8b00396
关键词
precursor supply; propionate assimilation; propionylation; propionyl-CoA synthetase; erythromycin biosynthesis
资金
- National Natural Science Foundation of China [31730004, 31700058, 21575089]
- China Postdoctoral Science Foundation [2017M610232]
- Fundamental Research Funds for the Central Universities [222201714025]
Erythromycin is necessary in medical treatment and known to be biosynthesized with propionyl-CoA as direct precursor. Oversupply of propionyl-CoA induced hyperpropionylation, which was demonstrated as harmful for erythromycin synthesis in Saccharopolyspora erythraea. Herein, we identified three propionyl-CoA synthetases regulated by propionylation, and one propionyl-CoA synthetase SACE_1780 revealed resistance to propionylation. A practical strategy for raising the precursor (propionyl-CoA) supply bypassing the feedback inhibition caused by propionylation was developed through two approaches: deletion of the propionyltransferase AcuA, and SACE_1780 overexpression. The constructed Delta acuA strain presented a 10% increase in erythromycin yield; SACE_1780 overexpression strain produced 33% higher erythromycin yield than the wildtype strain NRRL2338 and 22% higher erythromycin yield than the industrial high yield Ab strain. These findings uncover the role of protein acylation in precursor supply for antibiotics biosynthesis and provide efficient post-translational modification-metabolic engineering strategy (named as PTM-ME) in synthetic biology for improvement of secondary metabolites.
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