4-Hydroxy Pyridones from Heterologous Expression and Cultivation of the Native Host.
J Nat Prod. 2020 Oct 23;:
Authors: Zhang WY, Zhong Y, Yu Y, Shi DF, Huang HY, Tang XL, Wang YH, Chen GD, Zhang HP, Liu CL, Hu D, Gao H, Yao XS
4-Hydroxy pyridones are a class of fungi-derived polyketide-nonribosomal peptide products featuring a core of 4-hydroxy-2-pyridone which have a wide range of biological activities. Genome mining of in-house strains using polyketide synthase-nonribosomal peptide synthase as a query identified an endophyte Tolypocladium sp. 49Y, which possesses a potential 4-hydroxy pyridone biosynthetic gene cluster. Heterologous expression in Aspergillus oryzae NSAR1 revealed that this gene cluster is functional and able to produce a rare type of 4-hydroxy pyridones called tolypyridones (compounds 3 and 4). Tolypocladium sp. 49Y was grown in a variety of media which led to the isolation of six 4-hydroxy pyridones (5-10) and one pyrrolidone (11) from a rice culture, and compounds 3 and 9 showed antifungal activity. These latter compounds are different from those obtained by heterologous expression. This study shows that both heterologous expression and cultivation of the native host are complementary approaches to discover new natural products.
PMID: 33095987 [PubMed – as supplied by publisher]