Related Experiment Video
Updated: Dec 18, 2025

From a Natural Product to Its Biosynthetic Gene Cluster: A Demonstration Using Polyketomycin from Streptomyces diastatochromogenes Tü6028
Published on: January 13, 2017
Genetic localization of the orevactaene/epipyrone biosynthetic gene cluster in Epicoccum nigrum
Yoon Ji Lim1, Eunha Choi1, Si-Hyung Park2
1Department of Biological Sciences and Bioinformatics, Myongji University, Yongin-si, Gyunggi-do 17058, Republic of Korea.
Abstract:
Epipyrone (EPN)-A (syn. orevactaene) is a polyketide compound of 3-d-galactosyl-4-hydroxy-2-pyrone with a modified heptaene acyl moiety, produced from Epicoccum nigrum and was reported to have various biological activities. Genome analysis identified a hypothetical EPN biosynthetic gene cluster (BGC) composed of the four genes epnABCD, which encode a highly-reducing fungal polyketide synthase, a glycosyltransferase, a cytochrome P450, and a transporter. The individual gene inactivation of epnABC resulted in the total loss of EPN production, while the inactivation of a nearby transcription factor-encoding gene had no effect on the production of EPN, substantiating that epnABCD is the EPN BGC. mRNA expression indicated no epnA transcription in the epnB knockout mutant and the occurrence of the bicistronic transcription of epnAB. This study defined an EPN BGC, which is the first blueprint reported for glycosylated 2-pyrone polyketide biosynthesis.
More Related Videos
09:44Characterization of a Pathogenic Escherichia coli Strain Derived from Oreochromis spp. Farms Using Whole-Genome Sequencing
Published on: December 23, 2022
10:41The Logic, Experimental Steps, and Potential of Heterologous Natural Product Biosynthesis Featuring the Complex Antibiotic Erythromycin A Produced Through E. coli
Published on: January 13, 2013
Related Concept Videos
Exon Recombination
Exon shuffling follows “splice frame rules.” Each exon...
Repressible Operon: trp Operon
Prokaryotic Transcriptional Activators and Repressors
Transcription of prokaryotic...
Conservative Site-specific Recombination and Phase Variation
The recognition sites for Cre recombinase called LoxP...
Export of Mitochondrial and Chloroplast Genes