Precursor Supply for Erythromycin Biosynthesis: Engineering of Propionate Assimilation Pathway Based on Propionylation Modification.

Abstract:

: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 Δ 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.

journal_name

ACS Synth Biol

journal_title

ACS synthetic biology

authors

You D,Wang MM,Yin BC,Ye BC

doi

10.1021/acssynbio.8b00396

subject

Has Abstract

pub_date

2019-02-15 00:00:00

pages

371-380

issue

2

issn

2161-5063

journal_volume

8

pub_type

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