Type II thioesterase gene (ECO-orf27) from Amycolatopsis orientalis influences production of the polyketide antibiotic, ECO-0501 (LW01)
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Abstract
ECO-orf27 associated with the cluster of ECO-0501 (LW01) from Amycolatopsis orientalis is deduced to encode a type II thioesterase. Disruption of ECO-orf27 reduced LW01 production by 95 %. Complementation of the disrupted mutant with intact ECO-orf27 restored the production of LW01 suggesting that ECO-orf27 is crucial for LW01 biosynthesis. ECO-TE I, the gene encoding type I thioesterase from LW01 polyketide synthases, cannot complement ECO-orf27 deficient mutant distinguishing ECO-orf27 from type I thioesterase gene. Type II thioesterase gene pikAV from Streptomyces venezuelae could complement ECO-orf27 in A. orientalis indicating that the two genes are equivalent in their function. Overexpression of ECO-orf27 resulted in a 20 % increase in LW01 production providing an alternative approach for yield improvement.
Keywords
Amycolatopsis orientalis Antibiotic ECO-0501 antibiotic LW01 antibiotic Polyketide synthase ThioesteraseNotes
Acknowledgments
The research is granted by the National S&T Major Special Project on Major New Drug Innovation (2009ZX9302-004) and National Natural Science Foundation (NFSC30672558).
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References
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