Abstract
Heterologous expression of the fluostatin biosynthetic gene cluster from the marine-derived Micromonospora rosaria SCSIO N160 in Streptomyces albus J1074 led to the isolation of a novel isoindolequinone albumycin (1) and a known isoquinolinequinone mansouramycin A (2). The structure of 1 was elucidated on the basis of detailed 1D and 2D NMR spectroscopic analysis. Mansouramycin A (2) is active against methicillin-resistant Staphylococcus aureus ATCC 43300, with a MIC of 8 μg ml−1, while albumycin (1) displayed negligible antibacterial activities. This study represents another example of activation of secondary metabolites that are non-relevant to the heterologously introduced biosynthetic gene cluster in a bacterial host.
This is a preview of subscription content, access via your institution
Access options
Subscribe to Journal
Get full journal access for 1 year
$119.00
only $9.92 per issue
All prices are NET prices.
VAT will be added later in the checkout.
Tax calculation will be finalised during checkout.
Buy article
Get time limited or full article access on ReadCube.
$32.00
All prices are NET prices.


References
Dashti Y, Grkovic T, Abdelmohsen U, Hentschel U, Quinn R. Production of induced secondary metabolites by a co-culture of sponge-associated Actinomycetes, Actinokineospora sp. EG49 and Nocardiopsis sp. RV163. Mar Drugs. 2014;12:3046–59.
Esquenazi E, Yang Y-L, Watrous J, Gerwick WH, Dorrestein PC. Imaging mass spectrometry of natural products. Nat Prod Rep. 2009;26:1521–34.
Hindra, Huang T, Yang D, Rudolf JD, Xie P, Xie G, et al. Strain prioritization for natural product discovery by a high-throughput real-time PCR method. J Nat Prod. 2014;77:2296–303.
Yan Y, Liu Q, Zang X, Yuan S, Bat-Erdene U, Nguyen C, et al. Resistance-gene-directed discovery of a natural-product herbicide with a new mode of action. Nature. 2018;559:415–8.
Bushin LB, Clark KA, Pelczer I, Seyedsayamdost MR. Charting an unexplored streptococcal biosynthetic landscape reveals a unique peptide cyclization motif. J Am Chem Soc. 2018. https://doi.org/10.1021/jacs.8b10266.
Zhang MM, Wong FT, Wang Y, Luo S, Lim YH, Heng E, et al. CRISPR-Cas9 strategy for activation of silent Streptomyces biosynthetic gene clusters. Nat Chem Biol. 2017;13:607–9.
Yang D, Zhu X, Wu X, Feng Z, Huang L, Shen B, et al. Titer improvement of iso-migrastatin in selected heterologous Streptomyces hosts and related analysis of mRNA expression by quantitative RT–PCR. Appl Microbiol Biotechnol. 2011;89:1709–19.
Yang C, Huang C, Zhang W, Zhu Y, Zhang C. Heterologous expression of fluostatin gene cluster leads to a bioactive heterodimer. Org Lett. 2015;17:5324–7.
Huang C, Yang C, Zhang W, Zhang L, De BC, Zhu Y, et al. Molecular basis of dimer formation during the biosynthesis of benzofluorene-containing atypical angucyclines. Nat Commun. 2018;9:2088.
Huang C, Yang C, Zhu Y, Zhang W, Yuan C, Zhang C. Marine bacterial aromatic polyketides from host-dependent heterologous expression and fungal mode of cyclization. Front Chem. 2018;6:528.
Mahmoud KAS. Nafisamycin, cyclisation product of a new enediyne precursor, highly cytotoxic mansouramycins, karamomycins possessing a novel heterocyclic skeleton and further unusual secondary metabolites from terrestrial and marine bacteria. Ph.D. Thesis, Georg-August-Universität zu Göttingen, Germany, 2008.
Hawas UW, Shaaban M, Shaaban KA, Speitling M, Maier A, Kelter G, et al. Mansouramycins A−D, cytotoxic isoquinolinequinones from a marine Streptomycete. J Nat Prod. 2009;72:2120–4.
Xu F, Nazari B, Moon K, Bushin LB, Seyedsayamdost MR. Discovery of a cryptic antifungal compound from Streptomyces albus J1074 using high-throughput elicitor screens. J Am Chem Soc. 2017;139:9203–12.
Karlsson C, Jämstorp E, Strømme M, Sjödin M. Computational electrochemistry study of 16 isoindole-4,7-diones as candidates for organic cathode materials. J Phys Chem C. 2012;116:3793–801.
Zhang W, Liu Z, Li S, Lu Y, Chen Y, Zhang H, et al. Fluostatins I-K from the South China Sea-derived Micromonospora rosaria SCSIO N160. J Nat Prod. 2012;75:1937–43.
Zhang W, Yang C, Huang C, Zhang L, Zhang H, Zhang Q, et al. Pyrazolofluostatins A–C, pyrazole-fused benzo[a]fluorenes from South China Sea-derived Micromonospora rosaria SCSIO N160. Org Lett. 2017;19:592–5.
Braña AF, Rodríguez M, Pahari P, Rohr J, García LA, Blanco G. Activation and silencing of secondary metabolites in Streptomyces albus and Streptomyces lividans after transformation with cosmids containing the thienamycin gene cluster from Streptomyces cattleya. Arch Microbiol. 2014;196:345–55.
Olano C, García I, González A, Rodriguez M, Rozas D, Rubio J, et al. Activation and identification of five clusters for secondary metabolites in Streptomyces albus J1074. Microb Biotechnol. 2014;7:242–56.
Huang J, Shi J, Molle V, Sohlberg B, Weaver D, Bibb MJ, et al. Cross-regulation among disparate antibiotic biosynthetic pathways of Streptomyces coelicolor. Mol Microbiol. 2005;58:1276–87.
Schoenian I, Paetz C, Dickschat JS, Aigle B, Leblond P, Spiteller D. An unprecedented 1,2-shift in the biosynthesis of the 3-aminosalicylate moiety of antimycins. ChemBioChem. 2012;13:769–73.
Yan Y, Chen J, Zhang L, Zheng Q, Han Y, Zhang H, et al. Multiplexing of combinatorial chemistry in antimycin biosynthesis: expansion of molecular diversity and utility. Angew Chem Int Ed. 2013;52:12308–12.
Acknowledgements
This work is financially supported in part by the National Natural Science Foundation of China (31820103003, 31700042, 41676165), Guangdong Province (GDME-2018C005, 2015A030308013), and Chinese Academy of Sciences (QYZDJ-SSW-DQC004). We are grateful to Z. Xiao, A. Sun, C. Li, and Y. Zhang in the analytical facilities of SCSIO.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
The authors declare that they have no conflict of interest.
Additional information
Publisher’s note: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Supplementary information
Rights and permissions
About this article
Cite this article
Huang, C., Yang, C., Zhang, W. et al. Albumycin, a new isoindolequinone from Streptomyces albus J1074 harboring the fluostatin biosynthetic gene cluster. J Antibiot 72, 311–315 (2019). https://doi.org/10.1038/s41429-019-0161-4
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1038/s41429-019-0161-4