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Keywords = zunyimycins

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9 pages, 1404 KB  
Article
Zunyimycins B and C, New Chloroanthrabenzoxocinones Antibiotics against Methicillin-Resistant Staphylococcus aureus and Enterococci from Streptomyces sp. FJS31-2
by Yuhong Lü, Meiyun Shao, Yinyin Wang, Shengyan Qian, Miao Wang, Yingquan Wang, Xiaoqian Li, Yuxin Bao, Chengmin Deng, Changwu Yue, Daishun Liu, Ning Liu, Minghao Liu, Ying Huang, Zehui Chen and Yonglin Hu
Molecules 2017, 22(2), 251; https://doi.org/10.3390/molecules22020251 - 8 Feb 2017
Cited by 27 | Viewed by 6027
Abstract
This study performed an optimization of the fermentation conditions to activate the expression of the zunyimycin family biosynthesis genes of the zunyimycin-producing streptomycetes strain Streptomyces sp. FJS31-2. Bioassay-guided isolation and purification by varied chromatographic methods yielded two new compounds of the zunyimycin derivatives, [...] Read more.
This study performed an optimization of the fermentation conditions to activate the expression of the zunyimycin family biosynthesis genes of the zunyimycin-producing streptomycetes strain Streptomyces sp. FJS31-2. Bioassay-guided isolation and purification by varied chromatographic methods yielded two new compounds of the zunyimycin derivatives, namely, 31-2-7 and 31-2-8, accompanied with three known anthrabenzoxocinones family members of zunyimycin A, BE24566B, and chloroanthrabenzoxocinone. Their structures were elucidated by NMR, HRESIMS, IR, UV, and CD. Results showed that these two compounds were structurally similar to the previously reported compound zunyimycin A but differed in positions and number of chlorine atom substitution. The two novel compounds were called zunyimycins B and C. Antibacterial activity assay indicated that zunyimycin C showed a good inhibitory effect on the methicillin-resistant Staphylococcus aureus and Enterococci. Full article
(This article belongs to the Section Medicinal Chemistry)
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9 pages, 1952 KB  
Article
Molecular Genetic Characterization of an Anthrabenzoxocinones Gene Cluster in Streptomyces Sp. FJS31-2 for the Biosynthesis of BE-24566B and Zunyimycin Ale
by Yuhong Lü, Changwu Yue, Meiyun Shao, Shengyan Qian, Ning Liu, Yuxin Bao, Miao Wang, Minghao Liu, Xiaoqian Li, Yinyin Wang and Ying Huang
Molecules 2016, 21(6), 711; https://doi.org/10.3390/molecules21060711 - 30 May 2016
Cited by 16 | Viewed by 7133
Abstract
Genome mining is an effective tool used to discover novel natural products from actinomycetes. Genome sequence analysis of Streptomyces sp. FJS31-2 revealed the presence of one putative type II polyketide gene cluster (ABX), which may correspond to type II polyketide products including BE-24566B [...] Read more.
Genome mining is an effective tool used to discover novel natural products from actinomycetes. Genome sequence analysis of Streptomyces sp. FJS31-2 revealed the presence of one putative type II polyketide gene cluster (ABX), which may correspond to type II polyketide products including BE-24566B and its chloro-derivatives. The addition of natural humus acid successfully activated the biosynthsis of the abx gene cluster. BE-24566B and its chloro-derivatives, named zunyimycin A, were also detected. The targeted deletion of the polyketide skeleton synthesis genes such as abxp, abxk, and abxs was performed in the wild strain to identify the gene cluster for BE-24566B biosynthesis. Full article
(This article belongs to the Special Issue Polyketides)
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