Inthomycins are polyketide antibiotics which contain a terminal carboxamide group and a triene chain. Inthomycin B (1) and its two new analogues 2 and 3 were isolated from the crude extract of Streptomyces pactum L8. Identification of the gene cluster for inthomycin biosynthesis as well as the N-labeled glycine incorporation into inthomycins are described. Combined with the gene deletion of the rare P450 domain in the NRPS module, a formation mechanism of carboxamide moiety in inthomycins was proposed via an oxidative release of the assembly chain assisted by the P450 domain.
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http://dx.doi.org/10.1016/S1875-5364(20)60006-1 | DOI Listing |
Dokl Biol Sci
January 2025
Biological Faculty, Moscow State University, Moscow, Russia.
Expression of 11 genes of the Hox cluster (SiHox1, 2, 3, 5, 6, 7, 8, 9/10, 11/13a, 11/13b, and 11/13c) was assessed in the sea urchin Strongylocentrotus intermedius at early developmental stages, including the blastula (13 h post fertilization (hpf)), gastrula (35 hpf), prism (46 hpf), and pluteus (4 and 9 days post fertilization (dpf)) stages. Expression of SiHox7, 11/13b, and 11/13c was observed at the blastula stage; early activation of 11/13c was detected for the first time in regular sea urchins. The expression level was very low at the gastrula and prism stages.
View Article and Find Full Text PDFJ Nat Prod
January 2025
Fungal Natural Products Group, Westerdijk Fungal Biodiversity Institute, 3584 CT Utrecht, Netherlands.
Xylindein is a blue-green pigment produced by the fungi and Its stunning color and optoelectronic properties make xylindein valuable for textiles and as a natural semiconductor material. However, producing xylindein from culture broths remains challenging because of the slow growth of the species and the poor solubility of xylindein in organic solvents. An alternative production route for obtaining pure xylindein is heterologous expression of the xylindein biosynthetic genes.
View Article and Find Full Text PDFAppl Environ Microbiol
January 2025
State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China.
The biosynthesis of mupirocin, a clinically significant antibiotic produced by sp. NCIMB 10586, is activated by the -acyl homoserine lactone (AHL) MupR/I quorum sensing (QS) system. However, to date, limited research has focused on the influence of global regulators such as the GacS/A two-component system (TCS) on the MupR/I QS system or mupirocin biosynthesis.
View Article and Find Full Text PDFJCI Insight
January 2025
Centre for Cancer Research, Hudson Institute of Medical Research, and.
Pediatric high-grade gliomas (pHGGs) are the most aggressive brain tumors in children, necessitating innovative therapies to improve outcomes. Unlike adult gliomas, recent research reveals that childhood gliomas have distinct biological features, requiring specific treatment strategies. Here, we focused on deciphering unique genetic dependencies specific to childhood gliomas.
View Article and Find Full Text PDFFront Immunol
January 2025
Department of Neurological Care Unit, The First Affiliated Hospital of YangTze University, Jingzhou, Hubei, China.
Background: Recent years have seen persistently poor prognoses for glioma patients. Therefore, exploring the molecular subtyping of gliomas, identifying novel prognostic biomarkers, and understanding the characteristics of their immune microenvironments are crucial for improving treatment strategies and patient outcomes.
Methods: We integrated glioma datasets from multiple sources, employing Non-negative Matrix Factorization (NMF) to cluster samples and filter for differentially expressed metabolic genes.
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