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  • Title: nonG, a constituent of the nonactin biosynthetic gene cluster, regulates nocardamine synthesis in Streptomyces albus J1074.
    Author: Park W, Woo JK, Shin J, Oh KB.
    Journal: Biochem Biophys Res Commun; 2017 Aug 26; 490(3):664-669. PubMed ID: 28634080.
    Abstract:
    Many factors regulate the expression of specialised secondary metabolite biosynthetic gene clusters, which have been recognised as important for the discovery of novel microbial natural products. A cosmid library based on genomic DNA of the marine-derived Streptomyces puniceus Act1085 was constructed and screened to identify a short gene cluster similar to the nonactin biosynthetic cluster. The ORFs of the gene cluster isolated had high amino acid sequence identity, from 82% to 96%, with corresponding ORFs of the nonactin biosynthetic gene cluster from S. griseus subsp. griseus ETH A7796. Despite the expectation that nonactin or its derivatives would be made from heterologous expression of the gene cluster found in S. albus J1074, nocardamine was isolated. The heterologous expression data indicate that the production of nocardamine in S. albus J1074 is due to an ortholog of nonG, a TetR family transcriptional regulator, from S. puniceus Act1085.
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