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Mining novel biosynthetic machineries of secondary metabolites from actinobacteria

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Pages 1606-1615 | Received 15 Mar 2019, Accepted 03 Apr 2019, Published online: 24 Apr 2019

Figures & data

Figure 1. Biosynthesis of nonproteinogenic amino acids used as building blocks of nonribosomal peptides. Biosynthesis pathways of methylproline (2) (a), α-methyl-l-serine (8) (b) and nitrotyrosine (10) (c) used as building blocks of griselimycin (1), JBIR-34 (6), −35 (7) and rufomycin (9), respectively, are shown. KG, alpha-ketoglutarate; 5,10-MTHF, 5,10-methylenetetrahydrofolate; THF, tetrahydrofolate; SC, succinate.

Figure 1. Biosynthesis of nonproteinogenic amino acids used as building blocks of nonribosomal peptides. Biosynthesis pathways of methylproline (2) (a), α-methyl-l-serine (8) (b) and nitrotyrosine (10) (c) used as building blocks of griselimycin (1), JBIR-34 (6), −35 (7) and rufomycin (9), respectively, are shown. KG, alpha-ketoglutarate; 5,10-MTHF, 5,10-methylenetetrahydrofolate; THF, tetrahydrofolate; SC, succinate.

Figure 2. Biosynthesis of polyketides, streptazone E (11) (a), JBIR-76 (12), and −77 (13) (b) and fogacins (1517) (c).

Figure 2. Biosynthesis of polyketides, streptazone E (11) (a), JBIR-76 (12), and −77 (13) (b) and fogacins (15–17) (c).

Figure 3. Biosynthesis of an aromatic polyketide and a polyene polyketide by type II PKS systems. Overview of biosynthetic pathways of actinorhodin (a) and ishigamide (19) (b) are shown as examples, respectively.

Figure 3. Biosynthesis of an aromatic polyketide and a polyene polyketide by type II PKS systems. Overview of biosynthetic pathways of actinorhodin (a) and ishigamide (19) (b) are shown as examples, respectively.

Figure 4. Secondary metabolite specific nitrous acid biosynthetic pathway discovered from actinobacteria and natural products synthesized by this pathway.

Figure 4. Secondary metabolite specific nitrous acid biosynthetic pathway discovered from actinobacteria and natural products synthesized by this pathway.

Figure 5. Biosynthesis of benzastatin derivatives (a) and the key reaction involved in its bicyclic ring formation (b).

Figure 5. Biosynthesis of benzastatin derivatives (a) and the key reaction involved in its bicyclic ring formation (b).

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