Cyanochelin B: a cyanobacterium-produced siderophore with photolytic properties that negate iron monopolization in UV light.

ABSTRACT: Siderophores are low-molecular-weight compounds excreted by microorganisms to acquire iron and possibly to monopolize iron resource to achieve competitive advantage over other strains, or to trade for other substrates in mutualistic relationships. Siderophores that employ β-hydroxy-aspartate (β-OH-Asp) for iron chelation can undergo UV-mediated photolytic cleavage, simultaneously reducing Fe³⁺ to Fe²⁺. Photolytic siderophores can promote algal-bacterial mutualism, where the bacteria provide iron in exchange for dissolved organic carbon. We present a comprehensive characterization of cyanochelin B, a photolytic β-OH-Asp-containing siderophore produced by the filamentous cyanobacterium Leptolyngbya sp. NIES-3755. Combining nuclear magnetic resonance, high-resolut

SUBMITTER: Falcao BP 

PROVIDER: S-EPMC12628792 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature