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. 2019 Aug 5;58(37):13024–13029. doi: 10.1002/anie.201906326

Figure 3.

Figure 3

Discovery of novel diazeniumdiolate siderophores. A) Structure of gramibactin B, produced by P. caledonica. B) Biosynthetic gene cluster and deduced NRPS assembly line for megapolibactins, together with predicted building blocks. A: adenylation domain; C: condensation domain; E: epimerase domain; TE: thioesterase domain; green: thiolation domains. MSMS spectra showing characteristic losses of NO upon fragmentation of megapolibactin B, C, and F. C) Chemical structures of megapolibactins. D) Biosynthetic gene cluster and deduced NRPS for plantaribactin, together with predicted building blocks. MSMS spectra showing characteristic losses of NO upon fragmentation of plantaribactin. E) EIC traces of Marfey's derivatives to assign absolute configurations of β‐hydroxy aspartates in 6, 9, and 12. F) EIC traces of Mosher derivatives of 3‐hydroxy myristic acid from 9 and 12.