Improvement of daptomycin production in Streptomyces roseosporus through the acquisition of pleuromutilin resistance.

Improvement of daptomycin production in Streptomyces roseosporus through the acquisition of pleuromutilin resistance.
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DOI:
10.1155/2013/479742
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发表时间:
2013
影响因子:
--
通讯作者:
Liao G
Liao G
中科院分区:
生物学3区
文献类型:
--
作者:
Li L;Ma T;Liu Q;Huang Y;Hu C;Liao G

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Daptomycin, a cyclic lipopeptide antibiotic produced by Streptomyces roseosporus, displays potent activity against a variety of gram-positive pathogens. There is a demand for generating high-producing strains for industrial production of this valuable antibiotic. Ribosome engineering is a powerful strategy to enhance the yield of secondary metabolites. In this study, the effect of a diterpenoid antibiotic pleuromutilin resistance mutation on daptomycin production was assessed. Spontaneous pleuromutilin-resistant derivatives of S. roseosporus were isolated. Sequencing of rplC locus (encoding the ribosomal protein L3) showed a point mutation at nt 455, resulting in the substitution of glycine with valine. G152V mutants showed increased production of daptomycin by approximately 30% in comparison with the wild-type strain. Its effect on daptomycin production was due to enhanced gene transcription of the daptomycin biosynthetic genes. In conclusion, pleuromutilin could be used as a novel ribosome engineering agent to improve the production of desired secondary metabolites.
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