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Fig. 6 in Feature-based molecular networking-guided discovery of siderophores from a marine mesophotic zone Axinellida sponge-associated actinomycete Streptomyces diastaticus NBU2966

Fig. 6. NMR calculation results of 8. (a) Linear correlation plots of computed vs experimental 13C and 1H NMR chemical shifts. (b) Relative errors between the computed NMR values and experimental values. (c) The evaluation of NMR calculation results with statistical parameter MAE and CMAE.

Fig. 5 in Feature-based molecular networking-guided discovery of siderophores from a marine mesophotic zone Axinellida sponge-associated actinomycete Streptomyces diastaticus NBU2966

Fig. 5. NMR calculation results of two plausible isomers of 6. (a) Linear correlation plots of experimental vs computed 13C NMR chemical shifts. (b) Relative errors between the computed 13C NMR values of two potential structures and experimental 13C NMR chemical shifts. (c) The evaluation of calculation results with statistical parameter ME (Maximum Error), CME (Corrected Maximum Error), and CMAE (Corrected Mean Absolute Error).

Fig. 2 in Feature-based molecular networking-guided discovery of siderophores from a marine mesophotic zone Axinellida sponge-associated actinomycete Streptomyces diastaticus NBU2966

Fig. 2. Structures of siderophores 1–10. Three types of iron-chelating moieties are marked with blue, red, and purple, respectively. Previously undescribed natural products are highlighted with red subscript numbers. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)

Fig. 1 in Feature-based molecular networking-guided discovery of siderophores from a marine mesophotic zone Axinellida sponge-associated actinomycete Streptomyces diastaticus NBU2966

Fig. 1. Detected chemistries of the EtOAc extract of Streptomyces sp. NBU2966 as generated by LC-MS/MS, which was analyzed using NAP, Dereplicator+, and MolNetEnhancer workflow via the GNPS platform. With this network, wherein nodes represent a precursor ion, and its size is scaled to signal intensity and the thickness of edge between nodes suggests the similarity of fragment pattern. (a) Structural annotation for molecular families, wherein the color of nodes denotes the structural annotation at the superclass level by NAP. (b) Observation of molecular family A allows highlighting dereplicated (R)-2-(2-Hydroxyphenyl)-4-hydroxymethyl-4,5-dihydrothiazole. (c) Observation of molecular family B allowed to highlighting dereplicated pyochelin methyl ester. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)

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Figure 1 from: Fadhilah QG, Santoso I, Maryanto AE, Abdullah S, Yasman Y (2021) Evaluation of the antifungal activity of marine actinomycetes isolates against the phytopathogenic fungi Colletotrichum siamense KA: A preliminary study for new antifungal compound discovery. Pharmacia 68(4): 837-843. https://doi.org/10.3897/pharmacia.68.e72817

Figure 1 Results of the antibiosis assay of SM14 isolate in PDA filtrate medium. A. control, B. 6 days, C. 9 days, D. 12 days.

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Figure 3 from: Fadhilah QG, Santoso I, Maryanto AE, Abdullah S, Yasman Y (2021) Evaluation of the antifungal activity of marine actinomycetes isolates against the phytopathogenic fungi Colletotrichum siamense KA: A preliminary study for new antifungal compound discovery. Pharmacia 68(4): 837-843. https://doi.org/10.3897/pharmacia.68.e72817

Figure 3 Phylogenetic analysis of marine actinomycetes isolates. The neighbor-joining tree of the three marine actinomycetes isolates (SM11, SM14, and SM15) was based on the 16S rRNA gene sequences. Streptomyces albus subsp. albus DSM 40313T is represented as an outgroup. The bootstrap values, based on 1,000 replications, are shown at the nodes; only values above 50% are given. The scale bar indicates 0.0050 substitutions per nucleotide position.

Fig. 7 in Feature-based molecular networking-guided discovery of siderophores from a marine mesophotic zone Axinellida sponge-associated actinomycete Streptomyces diastaticus NBU2966

Fig. 7. Experimental and calculated ECD spectra of compounds 5, 6, 7, 9, and 10.

Fig. 4 in Feature-based molecular networking-guided discovery of siderophores from a marine mesophotic zone Axinellida sponge-associated actinomycete Streptomyces diastaticus NBU2966

Fig. 4. Putative mechanism leading to the formation of epimers in 5 and 9.

Fig. 3 in Feature-based molecular networking-guided discovery of siderophores from a marine mesophotic zone Axinellida sponge-associated actinomycete Streptomyces diastaticus NBU2966

Fig. 3. The key COSY and HMBC correlations of 5, 6, 7, 9, and 10.