alexa Strain improvement in actinomycetes in the postgenomic era.
Microbiology

Microbiology

Fermentation Technology

Author(s): Richard H Baltz

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With the recent advances in DNA sequencing technologies, it is now feasible to sequence multiple actinomycete genomes rapidly and inexpensively. An important observation that emerged from early Streptomyces genome sequencing projects was that each strain contains genes that encode 20 or more potential secondary metabolites, only a fraction of which are expressed during fermentation. More recently, this observation has been extended to many other actinomycetes with large genomes. The discovery of a wealth of orphan or cryptic secondary metabolite biosynthetic gene clusters has suggested that sequencing large numbers of actinomycete genomes may provide the starting materials for a productive new approach to discover novel secondary metabolites. The key issue for this approach to be successful is to find ways to turn on or turn up the expression of cryptic or poorly expressed pathways to provide material for structure elucidation and biological testing. In this review, I discuss several genetic approaches that are potentially applicable to many actinomycetes for this application.

This article was published in Journal of Industrial Microbiology & Biotechnology and referenced in Fermentation Technology

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