Abstract:
BACKGROUND:Streptomycetes produce a plethora of natural products including antibiotics and anticancer drugs, as well as many industrial enzymes. Their mycelial life style is a major bottleneck for industrial exploitation and over decades strain improvement programs have selected production strains with better growth properties. Uncovering the nature of the underlying mutations should allow the ready transfer of desirable traits to other production hosts. RESULTS:Here we report that the mat gene cluster, which was identified through reverse engineering of a non-pelleting mutant selected in a chemostat, is key to pellet formation of Streptomyces lividans. Deletion of matA or matB, which encode putative polysaccharide synthases, effects mycelial metamorphosis, with very small and open mycelia. Growth rate and productivity of the matAB null mutant were increased by over 60% as compared to the wild-type strain. CONCLUSION:Here, we present a way to counteract pellet formation by streptomycetes, which is one of the major bottlenecks in their industrial application. The mat locus is an ideal target for rational strain design approaches aimed at improving streptomycetes as industrial production hosts.
journal_name
Microb Cell Factjournal_title
Microbial cell factoriesauthors
van Dissel D,Claessen D,Roth M,van Wezel GPdoi
10.1186/s12934-015-0224-6subject
Has Abstractpub_date
2015-04-01 00:00:00pages
44issn
1475-2859pii
10.1186/s12934-015-0224-6journal_volume
14pub_type
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