Discovery of Three 22-Membered Macrolides by Deciphering the Streamlined Genome of Mangrove-Derived Streptomyces sp. HM190
| Autor: | Yanfang Nie, Zhe Zhao, Cen Yan, Jianwei Zhang, Min Wu, Xu-Ming Mao, Yanghui Ye, Ji-Dong Wang, Nusratgul Anwar, Shihua Wu, Ran Zhang |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Microbiology (medical)
Stereochemistry lcsh:QR1-502 22-membered macrolides Streptomyces Microbiology lcsh:Microbiology 03 medical and health sciences Polyketide Genomic island Gene cluster Streptomyces heilongjiangensis Secondary metabolism Gene Original Research 030304 developmental biology cytotoxic activities 0303 health sciences biology 030306 microbiology Chemistry structure elucidation Ribosomal RNA biology.organism_classification biosynthetic gene clusters Streptomyces sp. HM190 |
| Zdroj: | Frontiers in Microbiology, Vol 11 (2020) Frontiers in Microbiology |
| ISSN: | 1664-302X |
| DOI: | 10.3389/fmicb.2020.01464 |
| Popis: | Strain HM190, a moderate halophile, was isolated from rhizosphere soil of the mangrove Kandelia obovata in Fugong village, China. The 16S ribosomal RNA (rRNA) gene sequence and the results of phylogenetic analysis revealed that strain HM190 belonged to the genus Streptomyces and had the highest sequence similarity of 99.79% to Streptomyces heilongjiangensis NEAU-W2T. The complete genome of strain HM190 comprised 7,762,826 bp in a linear chromosome with 71.97% G + C content. According to antiSMASH analysis, a total of 30 biosynthetic gene clusters (BGCs) were predicted to be involved in secondary metabolism, 12 of which were responsible for the production of polyketide- and non-ribosomal peptide-derived secondary metabolites. Gene cluster 5 was responsible for macrolide biosynthesis in a strain-specific 126,331-bp genomic island belonging to the left-arm region. Combined genomics–metabolomics analysis led to the discovery of three 22-membered macrolides (compounds 1–3). Their structures were elucidated by using spectroscopic techniques including high-resolution electrospray ionization mass spectroscopy (HRESIMS) and nuclear magnetic resonance (NMR). The absolute configurations of compounds 1–3 were determined by the X-ray single crystal diffraction and NMR data analysis. All three compounds displayed moderate cytotoxic activities toward tumor cell lines HepG2, A549, and HCT116. |
| Databáze: | OpenAIRE |
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