Legonoxamines A-B, two new hydroxamate siderophores from the soil bacterium, Streptomyces sp. MA37

Fleurdeliz Maglangit* (Corresponding Author), Ming Him Tong, Marcel Jaspars, Kwaku Kyeremeh, Hai Deng* (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Two new siderophores belonging to the hydroxamate class, Legonoxamine A (1) and B (2) have been isolated from the soil bacterium, Streptomyces sp. MA37, together with one known compound, desferrioxamine B (3). Their structures were elucidated based on spectroscopic methods including 1D, 2D NMR, MS, as well as by comparison with the relevant literatures. To our knowledge, this is the first report describing a siderophore containing the N-hydroxyl phenylacetyl cadaverine (HPAC) moiety in the structure. Based on bioinformatics analysis and previous knowledge of the biosynthesis of the hydroxamate-type siderophore, the biosynthetic gene cluster (lgo) responsible for the production of 1–3 was identified in the annotated genome of the producing strain. The supplementation of phenylacetate and benzoate analogues with meta substitution into the cultures of Streptomyces sp. MA37 resulted in the production of new legonoxamine A derivatives as observed in LC-HR-ESIMS, suggesting that the legonoxamine biosynthetic pathway has a good degree of natural flexibility of accepting unnatural precursors with different functional groups.

Original languageEnglish
Pages (from-to)75-79
Number of pages5
JournalTetrahedron Letters
Issue number1
Early online date24 Nov 2018
Publication statusPublished - 3 Jan 2019

Bibliographical note

KK, HD and MJ are grateful for the financial support through Leverhulme Trust-Royal Society Africa award (AA090088). FM thanks the University of the Philippines for the Faculty, Reps and Staff Development Program (FRAS DP) PhD grant fellowship. MHT and HD thank Leverhulme Trust research project (RPG-2014-418).


  • Hydroxamates
  • Legonoxamine
  • Precursor-directed biosynthesis
  • Siderophores
  • Streptomyces sp. MA37


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