JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Heterologous production of myxobacterial α-pyrone antibiotics in Myxococcus xanthus.

Metabolic Engineering 2017 November
Myxopyronins (MXN) and corallopyronins (COR) are structurally related α-pyrone antibiotics from myxobacteria that represent a highly promising compound class for the development of broad-spectrum antibacterial therapeutic agents. Their ability to inhibit RNA polymerase through interaction with the "switch region", a novel target, distant from previously characterized RNA polymerase inhibitors (e.g. rifampicin), makes them particularly promising candidates for further research. To improve compound supply for further investigation of MXN, COR and novel derivatives of these antibacterial agents, establishment of an efficient and versatile microbial production platform for myxobacterial α-pyrone antibiotics is highly desirable. Here we describe design, construction and expression of a heterologous production and engineering platforms for MXN and COR to facilitate rational structure design and yield improvement approaches in the myxobacterial host strain Myxococcus xanthus DK1622. Optimization of the cultivation medium yielded significantly higher production titers of MXN A at around 41-fold increase and COR A at around 25-fold increase, compared to the standard CTT medium.

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