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PCR screening reveals unexpected antibiotic biosynthetic potential in Amycolatopsis sp. strain UM16

, : PCR screening reveals unexpected antibiotic biosynthetic potential in Amycolatopsis sp. strain UM16. Journal of Applied Microbiology 102(1): 245-253

Aims: To assess the antibiotic biosynthetic potential of Amycolatopsis sp. strain UM16 and eight other Amycolatopsis species.Methods and Results: Amycolatopsis genomic DNA was screened by PCR for the glycopeptide, Type-II (aromatic) polyketide and ansamycin biosynthetic gene clusters. Amycolatopsis sp. strain UM16, which exhibits weak antitubercular activity, was shown to have the glycopeptide oxyB gene and the Type-II (aromatic) polyketide-synthase KS alpha-KS beta tandem gene pair, but not the AHBA synthase gene. The ristocetin (glycopeptide) producer, Amycolatopsis lurida NRRL 2430(T), was shown to have the oxyB gene and the Type-II polyketide-synthase KS alpha-KS beta tandem gene pair. Amycolatopsis alba NRRL 18532(T) was shown to have the glycopeptide oxyB gene and the AHBA synthase gene. Phylogenetic analyses using Amycolatopsis oxyB and KS alpha-KS beta gene sequences were conducted.Conclusions: Amycolatopsis sp. strain UM16 appears to have the biosynthetic potential to produce glycopeptide and Type-II polyketide antibiotics, but not ansamycins. The potential to synthesize aromatic polyketides may be more widely distributed in Amycolatopsis than is currently recognized.Significance and Impact of the Study: PCR screening is a very useful tool for rapidly identifying the biosynthetic potential of an antibiotic-producing actinomycete isolate. Advanced knowledge of the type of antibiotic(s) produced will allow appropriate methods to be selected for antibiotic purification.


PMID: 17184341

DOI: 10.1111/j.1365-2672.2006.03043.x

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